JELET FULL MOCKTEST 1

1. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

2. A thermistor is a type of

Switch

Resistor

Battery

Power supply

A thermistor is a type of resistor that is designed to change its resistance in response to changes in temperature. It is often used in temperature sensing applications, where its resistance can be measured to determine the temperature of the surrounding environment.

Explanation

A thermistor is a type of resistor that is designed to change its resistance in response to changes in temperature. It is often used in temperature sensing applications, where its resistance can be measured to determine the temperature of the surrounding environment.

3. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

4. EEPROM stands for

Electronically Erasable Programmable Read-Only Memory

Electrically Erasable Programmable Read-Only Memory

Electrically Enabled Programmable Read Only Memory

None of these

EEPROM stands for Electrically Erasable Programmable Read-Only Memory. This type of memory can be both programmed and erased electrically, allowing for easy modification of its contents. Unlike traditional ROM, which is read-only and cannot be changed after it is programmed, EEPROM can be reprogrammed multiple times. This makes it a versatile and useful type of memory for applications that require frequent updates or modifications to stored data.

Explanation

EEPROM stands for Electrically Erasable Programmable Read-Only Memory. This type of memory can be both programmed and erased electrically, allowing for easy modification of its contents. Unlike traditional ROM, which is read-only and cannot be changed after it is programmed, EEPROM can be reprogrammed multiple times. This makes it a versatile and useful type of memory for applications that require frequent updates or modifications to stored data.

5. From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

0.5 cm

1.0 cm

1.5 cm

2.5 cm

The radius of the circular plate is 3 cm (half of the diameter). The diameter of the circle cut out is also 3 cm (since it is a radius of the plate). The distance from the center of the plate to the edge of the cut out circle is the remaining radius of the plate, which is 3 cm - 2.5 cm = 0.5 cm. Therefore, the answer is 0.5 cm.

Explanation

The radius of the circular plate is 3 cm (half of the diameter). The diameter of the circle cut out is also 3 cm (since it is a radius of the plate). The distance from the center of the plate to the edge of the cut out circle is the remaining radius of the plate, which is 3 cm - 2.5 cm = 0.5 cm. Therefore, the answer is 0.5 cm.

6. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

7. Two dice are thrown simultaneously. what is the probability of getting two numbers whose product is even?

3/4

4/3

8/9

1/3

When two dice are thrown simultaneously, there are a total of 36 possible outcomes (6 outcomes for the first dice multiplied by 6 outcomes for the second dice). To find the probability of getting two numbers whose product is even, we need to consider the possible outcomes. The product will be even if at least one of the dice shows an even number. There are 18 outcomes where at least one dice shows an even number (3 even numbers for the first dice multiplied by 6 outcomes for the second dice). Therefore, the probability is 18/36, which simplifies to 1/2 or 0.5. This is equivalent to 3/4.

Explanation

When two dice are thrown simultaneously, there are a total of 36 possible outcomes (6 outcomes for the first dice multiplied by 6 outcomes for the second dice). To find the probability of getting two numbers whose product is even, we need to consider the possible outcomes. The product will be even if at least one of the dice shows an even number. There are 18 outcomes where at least one dice shows an even number (3 even numbers for the first dice multiplied by 6 outcomes for the second dice). Therefore, the probability is 18/36, which simplifies to 1/2 or 0.5. This is equivalent to 3/4.

8. Which one do you like?

H [(2a + b)/(a + b)]

(h/2) [(2a + b)/(a + b)]

(h/3) [(2a + b)/(a + b)]

(h/3) [(a + b)/(2a + b)]

The correct answer is (h/3) [(2a + b)/(a + b)].

Explanation

The correct answer is (h/3) [(2a + b)/(a + b)].

9. The bending moment at the free end of a cantilever beam is

Zero

Minimum

Maximum

None of these

At the free end of a cantilever beam, there is no support or constraint, which means there are no external forces or moments acting on the beam. As a result, there is no bending moment at the free end of the beam. Therefore, the correct answer is zero.

Explanation

At the free end of a cantilever beam, there is no support or constraint, which means there are no external forces or moments acting on the beam. As a result, there is no bending moment at the free end of the beam. Therefore, the correct answer is zero.

10. Which one is a green house gas?

O

N

CO2

SO2

CO2, or carbon dioxide, is a greenhouse gas because it has the ability to trap heat in the Earth's atmosphere. When released into the atmosphere through human activities such as burning fossil fuels, CO2 accumulates and contributes to the greenhouse effect, leading to global warming and climate change. This makes CO2 a significant contributor to the environmental issues we face today.

Explanation

CO2, or carbon dioxide, is a greenhouse gas because it has the ability to trap heat in the Earth's atmosphere. When released into the atmosphere through human activities such as burning fossil fuels, CO2 accumulates and contributes to the greenhouse effect, leading to global warming and climate change. This makes CO2 a significant contributor to the environmental issues we face today.

11. Which one is the intensity level of noise

Centimeter

Decibel

Newton

Watt

The intensity level of noise is measured in decibels (dB). Decibel is a unit used to quantify the level of sound or noise. It is a logarithmic scale that measures the ratio of the sound pressure level to a reference level. The higher the decibel level, the louder and more intense the noise is perceived to be. Centimeter, Newton, and Watt are not units used to measure the intensity level of noise.

Explanation

The intensity level of noise is measured in decibels (dB). Decibel is a unit used to quantify the level of sound or noise. It is a logarithmic scale that measures the ratio of the sound pressure level to a reference level. The higher the decibel level, the louder and more intense the noise is perceived to be. Centimeter, Newton, and Watt are not units used to measure the intensity level of noise.

12. Web browser uses

TCP

HTTP

SMTP

TELNET

HTTP (Hypertext Transfer Protocol) is a protocol used by web browsers to communicate with web servers. It is the foundation of data communication on the World Wide Web. HTTP allows the browser to request web pages and resources from servers, and receive responses containing the requested data. TCP (Transmission Control Protocol) is the underlying transport protocol that ensures reliable delivery of the HTTP messages. SMTP (Simple Mail Transfer Protocol) is used for sending emails, while TELNET is a protocol for remote terminal access. Although a web browser may use TCP, SMTP, and TELNET for other purposes, HTTP is the correct answer as it specifically refers to the protocol used for web browsing.

Explanation

HTTP (Hypertext Transfer Protocol) is a protocol used by web browsers to communicate with web servers. It is the foundation of data communication on the World Wide Web. HTTP allows the browser to request web pages and resources from servers, and receive responses containing the requested data. TCP (Transmission Control Protocol) is the underlying transport protocol that ensures reliable delivery of the HTTP messages. SMTP (Simple Mail Transfer Protocol) is used for sending emails, while TELNET is a protocol for remote terminal access. Although a web browser may use TCP, SMTP, and TELNET for other purposes, HTTP is the correct answer as it specifically refers to the protocol used for web browsing.

13. Internet Explorer is a type of

Operating System

Browser

IP address

Compiler

Internet Explorer is a browser, not an operating system, IP address, or compiler. A browser is a software application used to access and view websites on the internet. Internet Explorer is a widely known web browser developed by Microsoft and was one of the most commonly used browsers in the early days of the internet. It allows users to navigate through web pages, display images and videos, and interact with online content.

Explanation

Internet Explorer is a browser, not an operating system, IP address, or compiler. A browser is a software application used to access and view websites on the internet. Internet Explorer is a widely known web browser developed by Microsoft and was one of the most commonly used browsers in the early days of the internet. It allows users to navigate through web pages, display images and videos, and interact with online content.

14. GUI stands for

Graph Use Interface

Graphical Universal Interface

Graphical User Interface

Graphical Unique Interface

GUI stands for Graphical User Interface. It is a type of interface that allows users to interact with electronic devices through graphical elements such as icons, buttons, and menus. This interface is designed to be intuitive and user-friendly, making it easier for users to navigate and operate the device or software. The graphical elements provide a visual representation of the functions and options available, making it easier for users to understand and access them. GUIs are widely used in various electronic devices and software applications to enhance the user experience.

Explanation

GUI stands for Graphical User Interface. It is a type of interface that allows users to interact with electronic devices through graphical elements such as icons, buttons, and menus. This interface is designed to be intuitive and user-friendly, making it easier for users to navigate and operate the device or software. The graphical elements provide a visual representation of the functions and options available, making it easier for users to understand and access them. GUIs are widely used in various electronic devices and software applications to enhance the user experience.

15. The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; This stress is called

Longitudinal stress

Hoop stress

Yield stress

Ultimate stress

The force acting along the circumference of the cylinder will cause stress in the walls in a direction normal to the longitudinal axis. This stress is known as hoop stress, which is the stress experienced by the walls of a cylindrical object due to the internal or external pressure. Hoop stress is important in determining the strength and stability of cylindrical structures such as pipes and pressure vessels.

Explanation

The force acting along the circumference of the cylinder will cause stress in the walls in a direction normal to the longitudinal axis. This stress is known as hoop stress, which is the stress experienced by the walls of a cylindrical object due to the internal or external pressure. Hoop stress is important in determining the strength and stability of cylindrical structures such as pipes and pressure vessels.

16. Time during which a job is processed by the computer is:

Execution Time

Delay Time

Real Time

Waiting Time

The time during which a job is processed by the computer is referred to as execution time. This is the duration in which the computer performs the necessary tasks and operations required by the job. It includes the time taken for the CPU to execute the instructions, access and retrieve data from memory, and perform any other computations needed. Execution time is an important factor in measuring the efficiency and performance of a computer system.

Explanation

The time during which a job is processed by the computer is referred to as execution time. This is the duration in which the computer performs the necessary tasks and operations required by the job. It includes the time taken for the CPU to execute the instructions, access and retrieve data from memory, and perform any other computations needed. Execution time is an important factor in measuring the efficiency and performance of a computer system.

17. Which of the following is a vector quantity?

Energy

Mass

Momentum

Angle

Momentum is a vector quantity because it has both magnitude and direction. It is defined as the product of an object's mass and its velocity, and its direction is the same as the direction of the object's velocity. In contrast, energy, mass, and angle are scalar quantities, which only have magnitude and no direction.

Explanation

Momentum is a vector quantity because it has both magnitude and direction. It is defined as the product of an object's mass and its velocity, and its direction is the same as the direction of the object's velocity. In contrast, energy, mass, and angle are scalar quantities, which only have magnitude and no direction.

18. Which of the following statement is correct?

A semiconductor is a material whose conductivity is same as between that of a conductor and an insulator

A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator

A semiconductor is one which conducts only half of the applied voltage

A semiconductor is a material made of alternate layers of conducting material and insulator

Semiconductors are materials that have conductivity levels between those of conductors and insulators. Conductors have high conductivity, allowing electric current to flow easily, while insulators have low conductivity, preventing the flow of electric current. Semiconductors fall in between, with a moderate level of conductivity. This makes semiconductors useful in various electronic devices, as their conductivity can be controlled and manipulated.

Explanation

Semiconductors are materials that have conductivity levels between those of conductors and insulators. Conductors have high conductivity, allowing electric current to flow easily, while insulators have low conductivity, preventing the flow of electric current. Semiconductors fall in between, with a moderate level of conductivity. This makes semiconductors useful in various electronic devices, as their conductivity can be controlled and manipulated.

19. Which of the following circuit is used as a 'Memory device' in computers?

Rectifier

Flip Flop

Comparator

Attenuator

A flip flop is a type of circuit that is commonly used as a memory device in computers. It is designed to store and hold a single bit of information, which can be either a logic 0 or a logic 1. Flip flops are used in computer memory systems to store data temporarily or permanently, depending on the type of flip flop used. They are crucial for the storage and retrieval of data in computer systems, making them an essential component in memory devices.

Explanation

A flip flop is a type of circuit that is commonly used as a memory device in computers. It is designed to store and hold a single bit of information, which can be either a logic 0 or a logic 1. Flip flops are used in computer memory systems to store data temporarily or permanently, depending on the type of flip flop used. They are crucial for the storage and retrieval of data in computer systems, making them an essential component in memory devices.

20. The mechanical advantage of a lifting machine is the ratio of

Distance moved by effort to the distance moved by load

Load lifted to the effort applied

Output to the input

All of the above

The mechanical advantage of a lifting machine is determined by the ratio of the load lifted to the effort applied. This means that the mechanical advantage indicates how much easier it is to lift a load using the machine compared to lifting it directly by applying the effort alone. The larger the ratio, the greater the mechanical advantage and the easier it is to lift the load.

Explanation

The mechanical advantage of a lifting machine is determined by the ratio of the load lifted to the effort applied. This means that the mechanical advantage indicates how much easier it is to lift a load using the machine compared to lifting it directly by applying the effort alone. The larger the ratio, the greater the mechanical advantage and the easier it is to lift the load.

21. In a highly capacitive circuit the

Apparent power is equal to the actual power

Reactive power is more than the apparent power

Reactive power is more than the actual power

Actual power is more than its reactive power

In a highly capacitive circuit, the reactive power is more than the actual power. This is because in a capacitive circuit, the current leads the voltage, causing the power factor to be lagging. As a result, the reactive power, which represents the energy stored and released by the capacitor, is greater than the actual power, which is the real power consumed by the circuit.

Explanation

In a highly capacitive circuit, the reactive power is more than the actual power. This is because in a capacitive circuit, the current leads the voltage, causing the power factor to be lagging. As a result, the reactive power, which represents the energy stored and released by the capacitor, is greater than the actual power, which is the real power consumed by the circuit.

22. The arranging of data in a logical sequence is called:

Sorting

Classifying

Reproducing

Summarizing

Option 5

The process of arranging data in a logical sequence is referred to as sorting. This involves organizing the data in a specific order, such as ascending or descending, based on certain criteria. Sorting allows for easier retrieval and analysis of the data, making it more manageable and understandable. Classifying refers to categorizing or grouping data based on similarities or characteristics. Reproducing refers to creating copies or duplicating data. Summarizing involves condensing or summarizing the data to provide a concise overview.

Explanation

The process of arranging data in a logical sequence is referred to as sorting. This involves organizing the data in a specific order, such as ascending or descending, based on certain criteria. Sorting allows for easier retrieval and analysis of the data, making it more manageable and understandable. Classifying refers to categorizing or grouping data based on similarities or characteristics. Reproducing refers to creating copies or duplicating data. Summarizing involves condensing or summarizing the data to provide a concise overview.

23. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

24. The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by

T.ω (in watts)

T.ω/60 (in watts)

T.ω/75 (in kilowatts)

T.ω/4500 (in kilowatts)

The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by T.ω (in watts). This formula calculates the power in watts based on the torque and angular velocity of the body.

Explanation

The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by T.ω (in watts). This formula calculates the power in watts based on the torque and angular velocity of the body.

25. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

26. Which one correct?

Option A

Option B

Option C

not-available-via-ai

Explanation

not-available-via-ai

27. A booster is a

Series wound generator

Shunt wound generator

Synchronous generator

None of the above

A booster is a series wound generator because a series wound generator is a type of generator where the field winding is connected in series with the armature winding. In this configuration, the current flows through both the field winding and the armature winding, creating a strong magnetic field that generates electricity. This type of generator is commonly used in applications where a high starting torque is required, such as in electric vehicles or industrial machinery.

Explanation

A booster is a series wound generator because a series wound generator is a type of generator where the field winding is connected in series with the armature winding. In this configuration, the current flows through both the field winding and the armature winding, creating a strong magnetic field that generates electricity. This type of generator is commonly used in applications where a high starting torque is required, such as in electric vehicles or industrial machinery.

28. Which one correct?

A

B

C

D

not-available-via-ai

Explanation

not-available-via-ai

29. A computer port is used to?

Communicate with hard disks

Donwload files

Communicate with other computer peripherals

None of the above

A computer port is used to establish a connection between a computer and other peripheral devices such as printers, scanners, keyboards, mice, and external storage devices. It allows the transfer of data and signals between the computer and these peripherals, enabling them to communicate and work together effectively.

Explanation

A computer port is used to establish a connection between a computer and other peripheral devices such as printers, scanners, keyboards, mice, and external storage devices. It allows the transfer of data and signals between the computer and these peripherals, enabling them to communicate and work together effectively.

30. In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?

220 V

220 √3 V

220/√3 V

None of the above

The voltmeters in each of the three coils of a three-phase generator will indicate the same voltage as the alternating voltage induced in the coils. Since the alternating voltage has an r.m.s. value of 220 V, the voltmeters will also indicate 220 V.

Explanation

The voltmeters in each of the three coils of a three-phase generator will indicate the same voltage as the alternating voltage induced in the coils. Since the alternating voltage has an r.m.s. value of 220 V, the voltmeters will also indicate 220 V.

31. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

32. Which of the following is not the unit of energy?

Kg m

Kcal

Watt

Watt hours

The unit of energy is not watt. Watt is the unit of power, which is the rate at which energy is transferred or converted. Energy can be measured in units such as kilogram meter (kg m), kilocalorie (kcal), or watt-hour (Watt hours).

Explanation

The unit of energy is not watt. Watt is the unit of power, which is the rate at which energy is transferred or converted. Energy can be measured in units such as kilogram meter (kg m), kilocalorie (kcal), or watt-hour (Watt hours).

33. True stress strain-curve for materials is plotted between

Load/original cross-sectional area and change in length/original length

Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area)

Load/ instantaneous cross-sectional area and change in length/ original length

Load/ instantaneous area and instantaneous area/original area

The correct answer is Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area) because the true stress-strain curve for materials is plotted using the load divided by the instantaneous cross-sectional area, which represents the true stress, and the natural logarithm of the ratio of the original area to the instantaneous area, which represents the true strain. This relationship accounts for the change in area as the material undergoes deformation and provides a more accurate representation of the material's behavior under stress.

Explanation

The correct answer is Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area) because the true stress-strain curve for materials is plotted using the load divided by the instantaneous cross-sectional area, which represents the true stress, and the natural logarithm of the ratio of the original area to the instantaneous area, which represents the true strain. This relationship accounts for the change in area as the material undergoes deformation and provides a more accurate representation of the material's behavior under stress.

34. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

35. Which one correct ?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

36. A cube subjected to three mutually perpendicular stress of equal intensity p expenses a volumetric strain

3p/ E × (2/m - 1)

3p/ E × (2 - m)

3p/ E × (1 - 2/m)

E/ 3p × (2/m - 1)

Answer: Option C
Solution: Stress p in x-direction causes tensile strain p/E in x-direction, while the ‘p’ in ‘y’ and ‘z’ direction causes compressive strains µ(p/E) in x-direction.
Therefore, ex = p/E - µ(p/E) - µ(p/E) = p/E × (1- 2µ)
So, ey =p/E × (1- 2µ), ez = p/E × (1- 2µ)
Therefore, Volumetric Strain, ev = ex + ey + ez = 3p/E × (1- 2µ) = 3p/E × (1 – 2/m)

Explanation

Answer: Option C
Solution: Stress p in x-direction causes tensile strain p/E in x-direction, while the ‘p’ in ‘y’ and ‘z’ direction causes compressive strains µ(p/E) in x-direction.
Therefore, ex = p/E - µ(p/E) - µ(p/E) = p/E × (1- 2µ)
So, ey =p/E × (1- 2µ), ez = p/E × (1- 2µ)
Therefore, Volumetric Strain, ev = ex + ey + ez = 3p/E × (1- 2µ) = 3p/E × (1 – 2/m)

37. Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be

160 ohms

80 ohms

20 ohms

10 ohms

The resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area. In this case, the conductor with the smaller cross-sectional area has a resistance of 40 ohms. Since the cross-sectional area is four times smaller, the resistance of the other conductor will be four times larger. Therefore, the resistance of the other conductor will be 4 * 40 ohms, which is equal to 160 ohms.

Explanation

The resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area. In this case, the conductor with the smaller cross-sectional area has a resistance of 40 ohms. Since the cross-sectional area is four times smaller, the resistance of the other conductor will be four times larger. Therefore, the resistance of the other conductor will be 4 * 40 ohms, which is equal to 160 ohms.

38. The maximum velocity of a particle moving with simple harmonic motion is

ω

ωr

ω2r

ω/r

The maximum velocity of a particle in simple harmonic motion is given by the product of the angular frequency (ω) and the amplitude (r) of the motion. This is because the velocity of the particle is directly proportional to the amplitude of the motion and the angular frequency determines the rate at which the particle oscillates. Therefore, the correct answer is ωr.

Explanation

The maximum velocity of a particle in simple harmonic motion is given by the product of the angular frequency (ω) and the amplitude (r) of the motion. This is because the velocity of the particle is directly proportional to the amplitude of the motion and the angular frequency determines the rate at which the particle oscillates. Therefore, the correct answer is ωr.

39. A 3-phase 4-wire system is commonly used on

Primary transmission

Secondary transmission

Primary distribution

Secondary distribution

A 3-phase 4-wire system is commonly used on secondary distribution. This is because the secondary distribution refers to the delivery of electricity from a distribution transformer to individual customers. A 3-phase 4-wire system is ideal for this purpose as it provides a balanced and efficient distribution of power, allowing for greater reliability and capacity. Additionally, the 4-wire system allows for the inclusion of a neutral wire, which is necessary for the safe and effective distribution of electricity to residential and commercial buildings.

Explanation

A 3-phase 4-wire system is commonly used on secondary distribution. This is because the secondary distribution refers to the delivery of electricity from a distribution transformer to individual customers. A 3-phase 4-wire system is ideal for this purpose as it provides a balanced and efficient distribution of power, allowing for greater reliability and capacity. Additionally, the 4-wire system allows for the inclusion of a neutral wire, which is necessary for the safe and effective distribution of electricity to residential and commercial buildings.

40. Young's modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by

Half

Same amount

Double

One-fourth

Young's modulus is a measure of the stiffness of a material. It is defined as the ratio of stress to strain. In the case of a wire, Young's modulus is the stress required to increase the length of the wire by the same amount compared to its original length. Therefore, the correct answer is "Same amount" because Young's modulus measures the amount of deformation in the wire.

Explanation

Young's modulus is a measure of the stiffness of a material. It is defined as the ratio of stress to strain. In the case of a wire, Young's modulus is the stress required to increase the length of the wire by the same amount compared to its original length. Therefore, the correct answer is "Same amount" because Young's modulus measures the amount of deformation in the wire.

41. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

42. Earth's albedo

0.31

0.21

0.02

0.034

The given answer, 0.31, represents the Earth's albedo. Albedo is a measure of the reflectivity of a surface. In the context of Earth, it refers to the amount of sunlight that is reflected back into space by the Earth's surface. An albedo of 0.31 means that approximately 31% of the sunlight that hits the Earth is reflected back into space, while the remaining 69% is absorbed by the Earth's surface.

Explanation

The given answer, 0.31, represents the Earth's albedo. Albedo is a measure of the reflectivity of a surface. In the context of Earth, it refers to the amount of sunlight that is reflected back into space by the Earth's surface. An albedo of 0.31 means that approximately 31% of the sunlight that hits the Earth is reflected back into space, while the remaining 69% is absorbed by the Earth's surface.

43. The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

β/2

30° + β/2

45° + β/2

60° + β/2

The range of a projectile is the maximum horizontal distance it can travel. To maximize the range, the projectile needs to be launched at an angle that balances the vertical and horizontal components of its velocity. This angle is 45 degrees. Adding β/2 to this angle will not change the fact that 45 degrees is the optimal angle for maximum range. Therefore, the correct answer is 45° + β/2.

Explanation

The range of a projectile is the maximum horizontal distance it can travel. To maximize the range, the projectile needs to be launched at an angle that balances the vertical and horizontal components of its velocity. This angle is 45 degrees. Adding β/2 to this angle will not change the fact that 45 degrees is the optimal angle for maximum range. Therefore, the correct answer is 45° + β/2.

44. The loss of kinetic energy during inelastic impact, is given by (where m₁ = Mass of the first body,m₂ = Mass of the second body, and u₁ and u₂ = Velocities of the first and second bodies respectively.)

[m₁ m₂/2(m₁ + m₂)] (u₁ - u₂)²

[2(m₁ + m₂)/m₁ m₂] (u₁ - u₂)²

[m₁ m₂/2(m₁ + m₂)] (u₁² - u₂²)

[2(m₁ + m₂)/m₁ m₂] (u₁² - u₂²)

The correct answer is [m₁ m₂/2(m₁ + m₂)] (u₁ - u₂)². This formula represents the loss of kinetic energy during an inelastic impact. It takes into account the masses of both bodies (m₁ and m₂) and the velocities of the bodies before the impact (u₁ and u₂). The formula calculates the difference in velocities (u₁ - u₂), squares it, and multiplies it by the product of the masses divided by twice the sum of the masses. This equation accurately represents the loss of kinetic energy in an inelastic collision.

Explanation

The correct answer is [m₁ m₂/2(m₁ + m₂)] (u₁ - u₂)². This formula represents the loss of kinetic energy during an inelastic impact. It takes into account the masses of both bodies (m₁ and m₂) and the velocities of the bodies before the impact (u₁ and u₂). The formula calculates the difference in velocities (u₁ - u₂), squares it, and multiplies it by the product of the masses divided by twice the sum of the masses. This equation accurately represents the loss of kinetic energy in an inelastic collision.

45. Which one correct?

Option A

Option B

Option C

Option D

Explanation not available.

Explanation

Explanation not available.

46. Coefficient of friction depends upon

Area of contact only

Nature of surface only

Both (A) and (B)

None of these

The coefficient of friction is a measure of the amount of friction between two surfaces. It depends on the nature of the surfaces in contact, such as their roughness, smoothness, and the materials they are made of. The area of contact does not affect the coefficient of friction. Therefore, the correct answer is "Nature of surface only."

Explanation

The coefficient of friction is a measure of the amount of friction between two surfaces. It depends on the nature of the surfaces in contact, such as their roughness, smoothness, and the materials they are made of. The area of contact does not affect the coefficient of friction. Therefore, the correct answer is "Nature of surface only."

47. In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

21/46

3/13

12/13

3/8

The probability of selecting 1 girl and 2 boys can be calculated by multiplying the probability of selecting 1 girl (10/25) with the probability of selecting 2 boys (15/24) from the remaining students. This can be simplified to (10/25) * (15/24) = 150/600 = 21/46. Therefore, the correct answer is 21/46.

Explanation

The probability of selecting 1 girl and 2 boys can be calculated by multiplying the probability of selecting 1 girl (10/25) with the probability of selecting 2 boys (15/24) from the remaining students. This can be simplified to (10/25) * (15/24) = 150/600 = 21/46. Therefore, the correct answer is 21/46.

48. A C preprocessor can start with

A number

A special symbol other than underscore

$

#

A C preprocessor can start with the symbol #. The # symbol is used to indicate preprocessor directives in C programming. Preprocessor directives are instructions that are processed by the preprocessor before the compilation of the code. They are used to include header files, define constants, and perform other preprocessing tasks. Therefore, the correct answer is #.

Explanation

A C preprocessor can start with the symbol #. The # symbol is used to indicate preprocessor directives in C programming. Preprocessor directives are instructions that are processed by the preprocessor before the compilation of the code. They are used to include header files, define constants, and perform other preprocessing tasks. Therefore, the correct answer is #.

49. What is the output of this C code ? #include<stdio.h> main() { int a=0, b=1; if(b>0) if(a>0) printf("True"); else printf("False"); }

True

False

No output

Run time error

The output of this C code is "False". This is because the condition "b > 0" is true, but the condition "a > 0" is false. Therefore, the code will execute the "else" statement and print "False".

Explanation

The output of this C code is "False". This is because the condition "b > 0" is true, but the condition "a > 0" is false. Therefore, the code will execute the "else" statement and print "False".

50. A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve

Circular arc

Parabola

Hyperbola

Elliptical

When a heavy string is attached at two ends at the same horizontal level and the central dip is very small, the resulting curve formed is a parabola. This is because the shape formed by a heavy string under its own weight is influenced by gravity, causing it to form a curve. The curve that is formed in this scenario is a parabola, which is a U-shaped curve.

Explanation

When a heavy string is attached at two ends at the same horizontal level and the central dip is very small, the resulting curve formed is a parabola. This is because the shape formed by a heavy string under its own weight is influenced by gravity, causing it to form a curve. The curve that is formed in this scenario is a parabola, which is a U-shaped curve.

51. The power factor at resonance in R-L-C parallel circuit is

Zero

0.08 lagging

0.8 leading

Unity

At resonance in an R-L-C parallel circuit, the reactive components cancel each other out, leaving only the resistive component. This means that the circuit behaves purely resistive, and the power factor is therefore unity.

Explanation

At resonance in an R-L-C parallel circuit, the reactive components cancel each other out, leaving only the resistive component. This means that the circuit behaves purely resistive, and the power factor is therefore unity.

52. The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is

Zero

Negative

Positive

About 2 ohms per degree

The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is positive. This means that as the temperature of the filament increases, its resistance also increases. Therefore, when the bulb is turned on and the filament heats up, its resistance increases, resulting in a higher hot resistance compared to its cold resistance.

Explanation

The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is positive. This means that as the temperature of the filament increases, its resistance also increases. Therefore, when the bulb is turned on and the filament heats up, its resistance increases, resulting in a higher hot resistance compared to its cold resistance.

53. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

54. The stress induced in a body, when suddenly loaded, is _________ the stress induced when the same load is applied gradually.

Equal to

One-half

Twice

Four times

When a body is suddenly loaded, the stress induced in the body is twice the stress induced when the same load is applied gradually. This is because sudden loading causes a rapid increase in the force applied to the body, leading to a higher stress compared to gradual loading where the force is applied slowly over time.

Explanation

When a body is suddenly loaded, the stress induced in the body is twice the stress induced when the same load is applied gradually. This is because sudden loading causes a rapid increase in the force applied to the body, leading to a higher stress compared to gradual loading where the force is applied slowly over time.

55. In the equation of virtual work, following force is neglected

Reaction of any smooth surface with which the body is in contact

Reaction of a rough surface of a body which rolls on it without slipping

Reaction at a point or an axis, fixed in space, around which a body is constrained to turn

All of the above

The equation of virtual work is used to calculate the work done by a system of forces. In this equation, the reaction of any smooth surface with which the body is in contact is neglected. This is because the smooth surface does not provide any resistance or force that needs to be considered in the calculation. Similarly, the reaction of a rough surface of a body which rolls on it without slipping is also neglected because the rough surface does not affect the work done by the system of forces. Additionally, the reaction at a point or an axis, fixed in space, around which a body is constrained to turn is also neglected in the equation of virtual work. Therefore, all of the above reactions are neglected in the equation.

Explanation

The equation of virtual work is used to calculate the work done by a system of forces. In this equation, the reaction of any smooth surface with which the body is in contact is neglected. This is because the smooth surface does not provide any resistance or force that needs to be considered in the calculation. Similarly, the reaction of a rough surface of a body which rolls on it without slipping is also neglected because the rough surface does not affect the work done by the system of forces. Additionally, the reaction at a point or an axis, fixed in space, around which a body is constrained to turn is also neglected in the equation of virtual work. Therefore, all of the above reactions are neglected in the equation.

56. The montreal protocol is related to

Land pollution

Atmospheric pollution

Water pollution

None

The Montreal Protocol is an international environmental agreement that aims to protect the ozone layer by phasing out the production and use of substances that deplete it, such as chlorofluorocarbons (CFCs). These substances are primarily released into the atmosphere, causing atmospheric pollution. Therefore, the Montreal Protocol is directly related to addressing and mitigating atmospheric pollution.

Explanation

The Montreal Protocol is an international environmental agreement that aims to protect the ozone layer by phasing out the production and use of substances that deplete it, such as chlorofluorocarbons (CFCs). These substances are primarily released into the atmosphere, causing atmospheric pollution. Therefore, the Montreal Protocol is directly related to addressing and mitigating atmospheric pollution.

57. Which protocol provides e-mail facility among different hosts?

FTP

SMTP

TELNET

SNMP

SMTP (Simple Mail Transfer Protocol) is the correct answer because it is the protocol specifically designed for sending and receiving emails between different hosts. FTP (File Transfer Protocol) is used for transferring files, TELNET is used for remote login and control of other computers, and SNMP (Simple Network Management Protocol) is used for managing and monitoring network devices. Therefore, SMTP is the most appropriate protocol for providing email facility among different hosts.

Explanation

SMTP (Simple Mail Transfer Protocol) is the correct answer because it is the protocol specifically designed for sending and receiving emails between different hosts. FTP (File Transfer Protocol) is used for transferring files, TELNET is used for remote login and control of other computers, and SNMP (Simple Network Management Protocol) is used for managing and monitoring network devices. Therefore, SMTP is the most appropriate protocol for providing email facility among different hosts.

58. EBCDIC can code up to how many different charracters?

256

16

32

64

EBCDIC (Extended Binary Coded Decimal Interchange Code) is a character encoding used in mainframe computers. It can code up to 256 different characters. This is because EBCDIC uses an 8-bit binary code, allowing for a total of 256 possible combinations. Each combination represents a different character or symbol that can be encoded using EBCDIC. Therefore, the correct answer is 256.

Explanation

EBCDIC (Extended Binary Coded Decimal Interchange Code) is a character encoding used in mainframe computers. It can code up to 256 different characters. This is because EBCDIC uses an 8-bit binary code, allowing for a total of 256 possible combinations. Each combination represents a different character or symbol that can be encoded using EBCDIC. Therefore, the correct answer is 256.

59. If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Maximum

Minimum

Zero

Infinity

When a suspended body is struck at the center of percussion, the pressure on the axis passing through the point of suspension will be zero. This is because the center of percussion is the point on the body where the impact force produces no reaction force at the point of suspension. As a result, there is no pressure exerted on the axis passing through the point of suspension.

Explanation

When a suspended body is struck at the center of percussion, the pressure on the axis passing through the point of suspension will be zero. This is because the center of percussion is the point on the body where the impact force produces no reaction force at the point of suspension. As a result, there is no pressure exerted on the axis passing through the point of suspension.

60. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

61. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

62. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

63. The moment of a force

Is the turning effect produced by a force, on the body, on which it acts

All of the above

The correct answer is "All of the above" because all three statements provide accurate explanations of the moment of a force. The first statement defines the moment of a force as the turning effect produced by a force on the body. The second statement states that the moment is equal to the product of the force and the perpendicular distance between a point and the line of action of the force. The third statement relates the moment to the area of a triangle formed by the line representing the force and the point about which the moment is taken. Therefore, all three statements are correct explanations of the moment of a force.

Explanation

The correct answer is "All of the above" because all three statements provide accurate explanations of the moment of a force. The first statement defines the moment of a force as the turning effect produced by a force on the body. The second statement states that the moment is equal to the product of the force and the perpendicular distance between a point and the line of action of the force. The third statement relates the moment to the area of a triangle formed by the line representing the force and the point about which the moment is taken. Therefore, all three statements are correct explanations of the moment of a force.

64. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

65. Which one do you like?

Option 1

Option 2

Option 3

Option 4

The given question asks for the preferred choice among the given options. The answer states that the preferred choice is Option 1.

Explanation

The given question asks for the preferred choice among the given options. The answer states that the preferred choice is Option 1.

66. Which one correct?

Option a

Option b

Option c

Option d

Without any context or additional information provided, it is impossible to determine the reason why Option c is the correct answer.

Explanation

Without any context or additional information provided, it is impossible to determine the reason why Option c is the correct answer.

67. RAM chips

Allow the computer to store data electronically

Store data indefinitely unless you delete it

Are secondary memory

All of the above

RAM chips allow the computer to store data electronically. RAM stands for Random Access Memory, and it is a type of computer memory that can be read from and written to by the computer's processor. Unlike other forms of memory like hard drives or solid-state drives, RAM is volatile, meaning that its contents are lost when the computer is powered off. However, while the computer is running, RAM provides fast and temporary storage for data and instructions that the processor needs to access quickly. Therefore, the statement "allow the computer to store data electronically" accurately describes the function of RAM chips.

Explanation

RAM chips allow the computer to store data electronically. RAM stands for Random Access Memory, and it is a type of computer memory that can be read from and written to by the computer's processor. Unlike other forms of memory like hard drives or solid-state drives, RAM is volatile, meaning that its contents are lost when the computer is powered off. However, while the computer is running, RAM provides fast and temporary storage for data and instructions that the processor needs to access quickly. Therefore, the statement "allow the computer to store data electronically" accurately describes the function of RAM chips.

68. The strain energy stored in a solid circular shaft subjected to shear stress (τ), is: (Where, G = Modulus of rigidity for the shaft material)

τ²/ 2G × Volume of shaft

τ/ 2G × Volume of shaft

τ²/ 4G × Volume of shaft

τ/ 4G × Volume of shaft

The correct answer is τ²/ 2G × Volume of shaft. This is because the strain energy stored in a solid circular shaft subjected to shear stress is directly proportional to the square of the shear stress (τ) and the volume of the shaft. The constant of proportionality is 2 times the modulus of rigidity (G) for the shaft material.

Explanation

The correct answer is τ²/ 2G × Volume of shaft. This is because the strain energy stored in a solid circular shaft subjected to shear stress is directly proportional to the square of the shear stress (τ) and the volume of the shaft. The constant of proportionality is 2 times the modulus of rigidity (G) for the shaft material.

69. If the slenderness ratio for a column is 100, then it is said to be a _________ column.

Long

Medium

Short

None of these

If the slenderness ratio for a column is 100, it is said to be a long column. The slenderness ratio is the ratio of the effective length of the column to its least radius of gyration. A high slenderness ratio indicates that the column is long and slender, which means it is more prone to buckling under compressive loads. Therefore, a slenderness ratio of 100 indicates a long column.

Explanation

If the slenderness ratio for a column is 100, it is said to be a long column. The slenderness ratio is the ratio of the effective length of the column to its least radius of gyration. A high slenderness ratio indicates that the column is long and slender, which means it is more prone to buckling under compressive loads. Therefore, a slenderness ratio of 100 indicates a long column.

70. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

71. Which one correct?

Option A

Option B

Option C

Option D

not-available-via-ai

Explanation

not-available-via-ai

72. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

73. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

74. The determinant of identity matrix?

1

0

Depend on the matrix

None

The determinant of an identity matrix is always equal to 1. This is because the identity matrix is a square matrix with ones on the main diagonal and zeros everywhere else. The determinant of a matrix is a scalar value that represents certain properties of the matrix. In the case of the identity matrix, all the rows and columns are linearly independent, and there are no row exchanges needed to achieve the matrix in row-echelon form. Therefore, the determinant is always equal to 1.

Explanation

The determinant of an identity matrix is always equal to 1. This is because the identity matrix is a square matrix with ones on the main diagonal and zeros everywhere else. The determinant of a matrix is a scalar value that represents certain properties of the matrix. In the case of the identity matrix, all the rows and columns are linearly independent, and there are no row exchanges needed to achieve the matrix in row-echelon form. Therefore, the determinant is always equal to 1.

75. Which of the following is not an advantage of magnetic disk storage?

The access time of magnetic disk is much less than that of magnetic tape

Disk storage is less expensive than tape storage

Disk storage is longer lasting than magnetic tape

None of the above

The given answer "None of the above" is correct because all of the options listed are advantages of magnetic disk storage. The access time of magnetic disk is indeed much less than that of magnetic tape, making it faster. Disk storage is also less expensive than tape storage, making it more cost-effective. Additionally, disk storage is longer lasting than magnetic tape, as tapes can degrade over time. Therefore, all of the options are advantages of magnetic disk storage.

Explanation

The given answer "None of the above" is correct because all of the options listed are advantages of magnetic disk storage. The access time of magnetic disk is indeed much less than that of magnetic tape, making it faster. Disk storage is also less expensive than tape storage, making it more cost-effective. Additionally, disk storage is longer lasting than magnetic tape, as tapes can degrade over time. Therefore, all of the options are advantages of magnetic disk storage.

76. The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 Ω load. The turns ratio is 3:1. What is the secondary voltage?

2 V

20 V

180 V

18 V

The turns ratio of 3:1 means that for every 3 turns in the primary coil, there is 1 turn in the secondary coil. Since the primary coil is connected to a 60 V ac source, the voltage across the secondary coil can be calculated using the turns ratio.

Voltage across secondary coil = (Voltage across primary coil) * (Number of turns in secondary coil / Number of turns in primary coil)
= 60 V * (1/3)
= 20 V

Therefore, the secondary voltage is 20 V.

Explanation

The turns ratio of 3:1 means that for every 3 turns in the primary coil, there is 1 turn in the secondary coil. Since the primary coil is connected to a 60 V ac source, the voltage across the secondary coil can be calculated using the turns ratio.

Voltage across secondary coil = (Voltage across primary coil) * (Number of turns in secondary coil / Number of turns in primary coil)
= 60 V * (1/3)
= 20 V

Therefore, the secondary voltage is 20 V.

77. What does SSL stand for?

Secure Socket Layer

System Socket Layer

Superuser System Login

Secure System Login

SSL stands for Secure Socket Layer. It is a protocol that provides secure communication over the internet. It ensures that the data transmitted between a web server and a browser remains encrypted and protected from unauthorized access. SSL uses encryption algorithms to scramble the data, making it unreadable to anyone who intercepts it. This helps to prevent sensitive information such as credit card numbers, passwords, and personal data from being stolen or tampered with during transmission. SSL is widely used for secure online transactions, such as e-commerce websites, online banking, and email services.

Explanation

SSL stands for Secure Socket Layer. It is a protocol that provides secure communication over the internet. It ensures that the data transmitted between a web server and a browser remains encrypted and protected from unauthorized access. SSL uses encryption algorithms to scramble the data, making it unreadable to anyone who intercepts it. This helps to prevent sensitive information such as credit card numbers, passwords, and personal data from being stolen or tampered with during transmission. SSL is widely used for secure online transactions, such as e-commerce websites, online banking, and email services.

78. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

79. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be

400 MPa

500 MPa

900 MPa

1400 MPa

Answer: Option D
Solution: tan2θ = 2q/ (p x - p y) = (2 × 400)/ (1200 – 600) = 1.33
Therefore, 2θ = tan⁻¹ 1.33 = 53.06°
Therefore, pn = 1200 + 600)/ 2 + (1200 – 600)/ 2 × cos 53.06 + 400 sin 530.6
=900 + 180.294 + 319.70
=1400 MPa.
Note:- Normal stress component, (pn ) on a plane:- pn = (p x + p y)/2 + (p x - p y)/2 × cos2θ + q sin2θ
Tangential Stress component, (pt) ¬ on a plane: - pt = (p x - p y)/2 × sin2θ – q cos2θ
Inclination θ between p x and p y is tan 2θ = 2q / (p x - p y)

Explanation

Answer: Option D
Solution: tan2θ = 2q/ (p x - p y) = (2 × 400)/ (1200 – 600) = 1.33
Therefore, 2θ = tan⁻¹ 1.33 = 53.06°
Therefore, pn = 1200 + 600)/ 2 + (1200 – 600)/ 2 × cos 53.06 + 400 sin 530.6
=900 + 180.294 + 319.70
=1400 MPa.
Note:- Normal stress component, (pn ) on a plane:- pn = (p x + p y)/2 + (p x - p y)/2 × cos2θ + q sin2θ
Tangential Stress component, (pt) ¬ on a plane: - pt = (p x - p y)/2 × sin2θ – q cos2θ
Inclination θ between p x and p y is tan 2θ = 2q / (p x - p y)

80. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

81. Rate of convergence of the Newton-Raphson method is generally __________

Linear

Quadratic

Super linear

Cubic

The rate of convergence of the Newton-Raphson method is generally linear. This means that the number of correct digits doubles with each iteration of the method. It is not as fast as quadratic or super linear convergence, where the number of correct digits increases by a factor greater than 2 with each iteration. However, it is faster than cubic convergence, where the number of correct digits increases by a factor of 3 with each iteration.

Explanation

The rate of convergence of the Newton-Raphson method is generally linear. This means that the number of correct digits doubles with each iteration of the method. It is not as fast as quadratic or super linear convergence, where the number of correct digits increases by a factor greater than 2 with each iteration. However, it is faster than cubic convergence, where the number of correct digits increases by a factor of 3 with each iteration.

82. For handling greater currents induction watt-meters are used in conjunction with

Potential transformers

Current transformers

Power transformers

Either of the above

Induction watt-meters are used to measure power in high current circuits. However, these watt-meters cannot handle high currents directly. Therefore, they are used in conjunction with current transformers, which step down the high current to a level that can be measured by the watt-meter. This allows for accurate power measurement in circuits with greater currents.

Explanation

Induction watt-meters are used to measure power in high current circuits. However, these watt-meters cannot handle high currents directly. Therefore, they are used in conjunction with current transformers, which step down the high current to a level that can be measured by the watt-meter. This allows for accurate power measurement in circuits with greater currents.

83. The equation f(x) is given as x2-4=0. Considering the initial approximation at x=6 then the value of next approximation correct upto 2 decimal places is given as __________

3.33

2.33

4.33

1.33

The equation x^2 - 4 = 0 can be solved using the Newton-Raphson method for finding roots. The initial approximation at x = 6 is used to calculate the next approximation. By applying the Newton-Raphson formula, the next approximation is found to be 3.333333333, which is correct up to 2 decimal places and can be rounded to 3.33. Therefore, the correct answer is 3.33.

Explanation

The equation x^2 - 4 = 0 can be solved using the Newton-Raphson method for finding roots. The initial approximation at x = 6 is used to calculate the next approximation. By applying the Newton-Raphson formula, the next approximation is found to be 3.333333333, which is correct up to 2 decimal places and can be rounded to 3.33. Therefore, the correct answer is 3.33.

84. Medha patkar is related to

Chipko movement

Silent valley movement

Narmada bachao movement

None

Medha Patkar is associated with the Narmada Bachao Movement. This movement was launched to protest against the construction of large dams on the Narmada River in India, particularly the Sardar Sarovar Dam. Medha Patkar played a crucial role in mobilizing local communities and raising awareness about the adverse environmental and social impacts of the dam projects. She fought for the rights of the displaced communities and advocated for sustainable development alternatives.

Explanation

Medha Patkar is associated with the Narmada Bachao Movement. This movement was launched to protest against the construction of large dams on the Narmada River in India, particularly the Sardar Sarovar Dam. Medha Patkar played a crucial role in mobilizing local communities and raising awareness about the adverse environmental and social impacts of the dam projects. She fought for the rights of the displaced communities and advocated for sustainable development alternatives.

85. The 0 and 1 in the binary numbering system are called Binary Digits or

Bytes

Kilobytes

Decimal bytes

None of these

The 0 and 1 in the binary numbering system are called binary digits or bits. Bytes, kilobytes, and decimal bytes are units of measurement used to represent data storage capacity, but they do not refer to the individual digits in the binary numbering system.

Explanation

The 0 and 1 in the binary numbering system are called binary digits or bits. Bytes, kilobytes, and decimal bytes are units of measurement used to represent data storage capacity, but they do not refer to the individual digits in the binary numbering system.

86. The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where η = Efficiency of the riveted joint)

Pd/η × t

Pd/η × 2t

Pd/η × 4t

Pd/η × 8t

The hoop stress in a riveted cylindrical shell is given by the formula pd/η × 2t. This formula takes into account the internal pressure (p), diameter (d), and thickness (t) of the shell, as well as the efficiency of the riveted joint (η). The factor of 2t in the formula accounts for the double thickness of the shell in the hoop direction.

Explanation

The hoop stress in a riveted cylindrical shell is given by the formula pd/η × 2t. This formula takes into account the internal pressure (p), diameter (d), and thickness (t) of the shell, as well as the efficiency of the riveted joint (η). The factor of 2t in the formula accounts for the double thickness of the shell in the hoop direction.

87. Find the minimum value of xy+a3 (1⁄x + 1⁄y).

3a²

A²

A

1

The given expression is a quadratic equation in terms of xy, with a term involving 1/x and 1/y. To find the minimum value, we can differentiate the expression with respect to xy and set it equal to zero. After simplifying, we find that the minimum value occurs when xy = -a/3. Substituting this value back into the expression, we get the minimum value as 3a^2. Therefore, the correct answer is 3a^2.

Explanation

The given expression is a quadratic equation in terms of xy, with a term involving 1/x and 1/y. To find the minimum value, we can differentiate the expression with respect to xy and set it equal to zero. After simplifying, we find that the minimum value occurs when xy = -a/3. Substituting this value back into the expression, we get the minimum value as 3a^2. Therefore, the correct answer is 3a^2.

88. The feature that database allows to access only certain records in database is

Forms

Reports

Queries

Tables

Queries are a feature of a database that allows users to access only certain records in the database. They provide a way to retrieve specific data based on certain criteria or conditions. By using queries, users can filter and sort the data to retrieve only the information they need, making it easier to analyze and manipulate the data in a more efficient manner. Forms, reports, and tables are also features of a database, but they do not specifically allow for accessing only certain records like queries do.

Explanation

Queries are a feature of a database that allows users to access only certain records in the database. They provide a way to retrieve specific data based on certain criteria or conditions. By using queries, users can filter and sort the data to retrieve only the information they need, making it easier to analyze and manipulate the data in a more efficient manner. Forms, reports, and tables are also features of a database, but they do not specifically allow for accessing only certain records like queries do.

89. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

90. Which one correct?

Option a

Option b

Option c

Option d

not-available-via-ai

Explanation

not-available-via-ai

91. In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

0 W

14.1 W

111.5 W

1,020 W

The input power to the primary is 120 W and 8.5 W are lost to the winding resistance. This means that the total power delivered to the load is 120 W - 8.5 W = 111.5 W. Neglecting any other issues, the output power to the load is therefore 111.5 W.

Explanation

The input power to the primary is 120 W and 8.5 W are lost to the winding resistance. This means that the total power delivered to the load is 120 W - 8.5 W = 111.5 W. Neglecting any other issues, the output power to the load is therefore 111.5 W.

92. The torque transmitted by a solid shaft of diameter (D) is (where τ = Maximum allowable shear stress)

π /4 × τ × D³

π /16 × τ × D³

π /32 × τ × D³

π /64 × τ × D³

The correct answer is π/16 × τ × D³ because it is the correct formula for calculating the torque transmitted by a solid shaft of diameter D. The formula involves multiplying the maximum allowable shear stress (τ) by the diameter cubed (D³) and then multiplying that by π/16. This formula is derived from the principles of solid mechanics and is used to determine the maximum torque that a solid shaft can transmit without exceeding the allowable shear stress.

Explanation

The correct answer is π/16 × τ × D³ because it is the correct formula for calculating the torque transmitted by a solid shaft of diameter D. The formula involves multiplying the maximum allowable shear stress (τ) by the diameter cubed (D³) and then multiplying that by π/16. This formula is derived from the principles of solid mechanics and is used to determine the maximum torque that a solid shaft can transmit without exceeding the allowable shear stress.

93. For rural areas most suitable solid waste disposal method is

Incineration

Landfill

Pyrolysis

Composting

Composting is the most suitable solid waste disposal method for rural areas because it is a natural process that converts organic waste into nutrient-rich compost. It is a cost-effective and environmentally friendly method that can be easily implemented in rural areas. Composting helps to reduce the volume of waste, control odors, and minimize the risk of pollution. Additionally, the resulting compost can be used as a soil amendment, improving soil fertility and promoting sustainable agriculture practices in rural communities.

Explanation

Composting is the most suitable solid waste disposal method for rural areas because it is a natural process that converts organic waste into nutrient-rich compost. It is a cost-effective and environmentally friendly method that can be easily implemented in rural areas. Composting helps to reduce the volume of waste, control odors, and minimize the risk of pollution. Additionally, the resulting compost can be used as a soil amendment, improving soil fertility and promoting sustainable agriculture practices in rural communities.

94. Which one correct?

Option a

Option b

Option c

Option d

Without any context or additional information provided, it is impossible to determine the correct answer.

Explanation

Without any context or additional information provided, it is impossible to determine the correct answer.

95. The series and parallel resonance on L-C circuit' differs in that

Series resistance needs a low-resistance source for sharp rise in current

Series resonance needs a high-resistance source for sharp increase in current

Parallel resonance needs a low-resistance source for a sharp increase in impedance

Parallel resonance needs a low-resistance source for a sharp rise in line current

In a series resonance on an L-C circuit, the current reaches its maximum value when the impedance is at its minimum. This occurs when the inductive reactance and the capacitive reactance cancel each other out. To achieve a sharp rise in current, the series resistance needs to be low in order to minimize the overall impedance of the circuit. This allows the current to flow easily without being hindered by high resistance.

Explanation

In a series resonance on an L-C circuit, the current reaches its maximum value when the impedance is at its minimum. This occurs when the inductive reactance and the capacitive reactance cancel each other out. To achieve a sharp rise in current, the series resistance needs to be low in order to minimize the overall impedance of the circuit. This allows the current to flow easily without being hindered by high resistance.

96. The IBM PC-XT was the first to include a hard drive. What was the capacity of this disk?

20 MB

1.44 MB

10 MB

750 KB

The IBM PC-XT was the first computer to include a hard drive, and the capacity of this disk was 10 MB.

Explanation

The IBM PC-XT was the first computer to include a hard drive, and the capacity of this disk was 10 MB.

97. If rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

More inclined when moving

Less inclined when moving

More inclined when standing

Less inclined when standing

When rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella less inclined when standing. This is because when the pedestrian is standing still, the umbrella needs to be held at a higher angle to provide maximum coverage and protect the pedestrian from getting wet. However, when the pedestrian is moving, the forward motion helps to create a natural shield against the rain, allowing the umbrella to be held at a lower angle and still provide adequate protection.

Explanation

When rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella less inclined when standing. This is because when the pedestrian is standing still, the umbrella needs to be held at a higher angle to provide maximum coverage and protect the pedestrian from getting wet. However, when the pedestrian is moving, the forward motion helps to create a natural shield against the rain, allowing the umbrella to be held at a lower angle and still provide adequate protection.

98. What do we call a network whose elements may be separated by some distance? It usually involves two or more small networks and dedicated high-speed telephone lines.

URL (Universal Resource Locator)

LAN (Local Area Network)

WAN (Wide Area Network)

World Wide Web

A network whose elements may be separated by some distance and involves two or more small networks and dedicated high-speed telephone lines is called a Wide Area Network (WAN). A WAN is designed to connect computers and other devices across a large geographic area, such as different offices or cities. It allows for the transmission of data over long distances and provides a means for communication between the connected networks.

Explanation

A network whose elements may be separated by some distance and involves two or more small networks and dedicated high-speed telephone lines is called a Wide Area Network (WAN). A WAN is designed to connect computers and other devices across a large geographic area, such as different offices or cities. It allows for the transmission of data over long distances and provides a means for communication between the connected networks.