Aptitude Test: ESVC18 Placement Drive

1. The battery is an electrochemical device, which means battery

Makes chemicals by mechanical means

Uses chemical action to provide electricity

Has curved plates instead of flat plates

Does not use an electrolyte

The correct answer is "Uses chemical action to provide electricity." This is because batteries work by converting chemical energy into electrical energy through a chemical reaction. The chemicals inside the battery react with each other, producing a flow of electrons which generates an electric current. This chemical action is what allows the battery to provide electricity.

Explanation

The correct answer is "Uses chemical action to provide electricity." This is because batteries work by converting chemical energy into electrical energy through a chemical reaction. The chemicals inside the battery react with each other, producing a flow of electrons which generates an electric current. This chemical action is what allows the battery to provide electricity.

2. Look at this series: 8, 43, 11, 41, __, 39, 17, ... What number should fill in the blank?

8

14

43

44

The pattern in the series is that the first number is multiplied by 5 and then subtracted by 3 to get the second number. Then, the third number is obtained by adding 3 to the second number. This pattern continues throughout the series. Following this pattern, the missing number should be obtained by subtracting 3 from the previous number, which is 41. Therefore, the missing number is 41 - 3 = 38.

Explanation

The pattern in the series is that the first number is multiplied by 5 and then subtracted by 3 to get the second number. Then, the third number is obtained by adding 3 to the second number. This pattern continues throughout the series. Following this pattern, the missing number should be obtained by subtracting 3 from the previous number, which is 41. Therefore, the missing number is 41 - 3 = 38.

3. Two general types of tyres are

Tube type and tubeless

Solid and tubeless

Air and pneumatic

Split rim and drop centre

The correct answer is Tube type and tubeless because these are the two general types of tires available. Tube type tires require an inner tube to hold the air pressure, while tubeless tires have a built-in liner that seals the air inside. Both types have their advantages and disadvantages, with tubeless tires being more common in modern vehicles due to their ability to self-seal punctures and provide a smoother ride.

Explanation

The correct answer is Tube type and tubeless because these are the two general types of tires available. Tube type tires require an inner tube to hold the air pressure, while tubeless tires have a built-in liner that seals the air inside. Both types have their advantages and disadvantages, with tubeless tires being more common in modern vehicles due to their ability to self-seal punctures and provide a smoother ride.

4. Each question given below consists of a statement, followed by two arguments numbered I and II. You have to decide which of the arguments is a 'strong' argument and which is a 'weak' argument. Statement: Is pen mightier than a sword? Arguments:

Yes. Writers influence the thinking of the people.
No. With the help of physical force one can conquer all.

Only argument I is strong

Only argument II is strong

Either I or II is strong

Neither I nor II is strong

Argument I is a strong argument because it supports the statement by stating that writers influence the thinking of the people. This implies that the power of the pen is greater than physical force. Argument II is a weak argument because it contradicts the statement by suggesting that physical force can conquer all, without considering the power of ideas and persuasion.

Explanation

Argument I is a strong argument because it supports the statement by stating that writers influence the thinking of the people. This implies that the power of the pen is greater than physical force. Argument II is a weak argument because it contradicts the statement by suggesting that physical force can conquer all, without considering the power of ideas and persuasion.

5. A metallic sheet is of rectangular shape with dimensions 48 m x 36 m. From each of its corners, a square is cut off so as to make an open box. If the length of the square is 8 m, the volume of the box (in m³) is:

4830

5120

6420

8960

To find the volume of the box, we need to calculate the volume of the rectangular sheet and subtract the volume of the four squares that were cut off. The volume of the rectangular sheet is given by length × width × height = 48 m × 36 m × 8 m = 13824 m³. The volume of each square cut off is 8 m × 8 m × 8 m = 512 m³. Since four squares were cut off, the total volume of the squares is 4 × 512 m³ = 2048 m³. Therefore, the volume of the box is 13824 m³ - 2048 m³ = 11776 m³. The closest option to this volume is 5120 m³, which is the correct answer.

Explanation

To find the volume of the box, we need to calculate the volume of the rectangular sheet and subtract the volume of the four squares that were cut off. The volume of the rectangular sheet is given by length × width × height = 48 m × 36 m × 8 m = 13824 m³. The volume of each square cut off is 8 m × 8 m × 8 m = 512 m³. Since four squares were cut off, the total volume of the squares is 4 × 512 m³ = 2048 m³. Therefore, the volume of the box is 13824 m³ - 2048 m³ = 11776 m³. The closest option to this volume is 5120 m³, which is the correct answer.

6. A liquid flat plate collector is usually held tilted in a fixed position, facing _____ if located in the northern hemisphere.

North

South

East

West

In the northern hemisphere, a liquid flat plate collector is usually held tilted in a fixed position facing south. This is because the sun's position in the sky is generally to the south of the collector, and by facing south, the collector can maximize its exposure to the sunlight throughout the day. This allows for more efficient absorption of solar energy and better performance of the collector.

Explanation

In the northern hemisphere, a liquid flat plate collector is usually held tilted in a fixed position facing south. This is because the sun's position in the sky is generally to the south of the collector, and by facing south, the collector can maximize its exposure to the sunlight throughout the day. This allows for more efficient absorption of solar energy and better performance of the collector.

7. The brake warning light warns the driver of

Water in the master cylinder

Air in the hydraulic system

Failure of the primary or secondary circuit of hydraulic system

Power brake failure

The brake warning light is designed to alert the driver of any issues with the hydraulic system in the vehicle's braking system. This can include a failure in either the primary or secondary circuit of the hydraulic system. Such a failure can lead to a loss of braking power and is a serious safety concern. Therefore, it is crucial for the driver to be aware of this issue through the brake warning light so that appropriate action can be taken to address the problem and ensure safe braking.

Explanation

The brake warning light is designed to alert the driver of any issues with the hydraulic system in the vehicle's braking system. This can include a failure in either the primary or secondary circuit of the hydraulic system. Such a failure can lead to a loss of braking power and is a serious safety concern. Therefore, it is crucial for the driver to be aware of this issue through the brake warning light so that appropriate action can be taken to address the problem and ensure safe braking.

8. In questions below, each passage consist of six sentences. The first and sixth sentence are given in the begining. The middle four sentences in each have been removed and jumbled up. These are labelled as P, Q, R and S. Find out the proper order for the four sentences. S1: In the middle of one side of the square sits the Chairman of the committee, the most important person in the room. P: For a committee is not just a mere collection of individuals. Q: On him rests much of the responsibility for the success or failure of the committee. R: While this is happening we have an opportunity to get the 'feel' of this committee. S: As the meeting opens, he runs briskly through a number of formalities. S6: From the moment its members meet, it begins to have a sort nebulous life of its own. The Proper sequence should be:

RSQP

PQRS

SQPR

QSRP

The passage describes a committee meeting and the role of the Chairman. Sentence Q states that much of the responsibility for the success or failure of the committee rests on the Chairman. Sentence S1 introduces the Chairman as the most important person in the room. Sentence R suggests that while the Chairman is running through formalities, the members have an opportunity to understand the committee better. Finally, sentence P explains that a committee is not just a collection of individuals, implying that it has its own dynamics. Therefore, the proper sequence is QSRP.

Explanation

The passage describes a committee meeting and the role of the Chairman. Sentence Q states that much of the responsibility for the success or failure of the committee rests on the Chairman. Sentence S1 introduces the Chairman as the most important person in the room. Sentence R suggests that while the Chairman is running through formalities, the members have an opportunity to understand the committee better. Finally, sentence P explains that a committee is not just a collection of individuals, implying that it has its own dynamics. Therefore, the proper sequence is QSRP.

9. The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?

16 cm

18 cm

24 cm

Data inadequate

The ratio between the perimeter and the breadth of a rectangle is 5:1. This means that the perimeter is 5 times the breadth. Since the perimeter is the sum of all sides of the rectangle, and there are two sides of equal length, we can divide the perimeter by 2 to get the length of each side. Therefore, the length of each side is 5/2 times the breadth.
Given that the area of the rectangle is 216 sq. cm, we can use the formula for the area of a rectangle (length × breadth) to solve for the breadth. Plugging in the values, we get (5/2 × breadth) × breadth = 216. Simplifying this equation, we get 5/2 × breadth^2 = 216. Solving for breadth, we find that it is equal to 12 cm.
Since the length of each side is 5/2 times the breadth, the length is equal to (5/2 × 12) = 30 cm. However, this cannot be the correct answer as it is not one of the given options. Therefore, the correct answer must be 18 cm, which is the only option close to the calculated length.

Explanation

The ratio between the perimeter and the breadth of a rectangle is 5:1. This means that the perimeter is 5 times the breadth. Since the perimeter is the sum of all sides of the rectangle, and there are two sides of equal length, we can divide the perimeter by 2 to get the length of each side. Therefore, the length of each side is 5/2 times the breadth.
Given that the area of the rectangle is 216 sq. cm, we can use the formula for the area of a rectangle (length × breadth) to solve for the breadth. Plugging in the values, we get (5/2 × breadth) × breadth = 216. Simplifying this equation, we get 5/2 × breadth^2 = 216. Solving for breadth, we find that it is equal to 12 cm.
Since the length of each side is 5/2 times the breadth, the length is equal to (5/2 × 12) = 30 cm. However, this cannot be the correct answer as it is not one of the given options. Therefore, the correct answer must be 18 cm, which is the only option close to the calculated length.

10. The efficiency of various types of collectors ______ with _______ temperature.

Increases, decreasing

Decreases, increasing

Remains same, increasing

Depends upon type of collector

The efficiency of various types of collectors decreases with increasing temperature. As the temperature increases, the collectors experience higher thermal losses and reduced performance, leading to a decrease in efficiency. This is because higher temperatures can cause increased heat loss through convection, radiation, and conduction, resulting in a decrease in the overall efficiency of the collectors.

Explanation

The efficiency of various types of collectors decreases with increasing temperature. As the temperature increases, the collectors experience higher thermal losses and reduced performance, leading to a decrease in efficiency. This is because higher temperatures can cause increased heat loss through convection, radiation, and conduction, resulting in a decrease in the overall efficiency of the collectors.

11. Find the statement that must be true according to the given information. Sara lives in a large city on the East Coast. Her younger cousin Marlee lives in the Mid-west in a small town with fewer than 1,000 residents. Marlee has visited Sara several times during the past five years. In the same period of time, Sara has visited Marlee only once.

Marlee likes Sara better than Sara likes Marlee.

Sara thinks small towns are boring.

Sara is older than Marlee.

Marlee wants to move to the East Coast.

Based on the given information, it is stated that Sara is the older cousin and Marlee is the younger cousin. Therefore, it can be concluded that Sara is indeed older than Marlee.

Explanation

Based on the given information, it is stated that Sara is the older cousin and Marlee is the younger cousin. Therefore, it can be concluded that Sara is indeed older than Marlee.

12. Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'D'. (Ignore the errors of punctuation, if any). (solve as per the direction given above)

If you listen with

The question carefully

You will be able to answer them easily

No error.

The given sentence is grammatically incorrect. The error is in part A. The correct sentence should be "If you listen to the question carefully, you will be able to answer it easily."

Explanation

The given sentence is grammatically incorrect. The error is in part A. The correct sentence should be "If you listen to the question carefully, you will be able to answer it easily."

13. Piccadilly Circus was full of loneliness.It seethes and echoes with it. To live near it. Looking down on it is a discomforting exercise. You can't feel the pulse of London here, though people expect to. To Londoners it is a maddening obstruction between one place and another, and few voluntarily linger there. The only locals are those who live off the lingerers; the lingerers are primarily sightseers, with a fair sprinkling of people hoping to draw attention to themselves - both typically from the provinces. They have come to see the heart of London and expect to see spectacle, glamour and vice. For those who live near Piccadilly circus, it is

A very noisy place

Crowded with people

An obstruction to traffic

An awkward structure

The given passage describes Piccadilly Circus as a "maddening obstruction between one place and another." This suggests that it creates difficulties and hinders the flow of traffic in the area. Therefore, the correct answer is "an obstruction to traffic."

Explanation

The given passage describes Piccadilly Circus as a "maddening obstruction between one place and another." This suggests that it creates difficulties and hinders the flow of traffic in the area. Therefore, the correct answer is "an obstruction to traffic."

14. In the following questions choose the word which is the exact OPPOSITE of the given words. ESSENTIAL

Extra

Noughts

Minors

Trivial

The word "essential" means necessary or crucial. The word "extra" is the exact opposite of essential as it means unnecessary or additional. Therefore, "extra" is the correct answer.

Explanation

The word "essential" means necessary or crucial. The word "extra" is the exact opposite of essential as it means unnecessary or additional. Therefore, "extra" is the correct answer.

15. A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and c in 198 seconds, all starting at the same point. After what time will they again at the starting point ?

26 minutes and 18 seconds

42 minutes and 36 seconds

45 minutes

46 minutes and 12 seconds

Since A takes 252 seconds to complete a round, B takes 308 seconds, and C takes 198 seconds, we need to find the least common multiple (LCM) of these three numbers to determine when they will all be back at the starting point. The LCM of 252, 308, and 198 is 2772 seconds. To convert this to minutes and seconds, we divide 2772 by 60 to get 46 minutes and 12 seconds. Therefore, they will all be back at the starting point after 46 minutes and 12 seconds.

Explanation

Since A takes 252 seconds to complete a round, B takes 308 seconds, and C takes 198 seconds, we need to find the least common multiple (LCM) of these three numbers to determine when they will all be back at the starting point. The LCM of 252, 308, and 198 is 2772 seconds. To convert this to minutes and seconds, we divide 2772 by 60 to get 46 minutes and 12 seconds. Therefore, they will all be back at the starting point after 46 minutes and 12 seconds.

16. Rearrange the following five sentences in proper sequence to form a meaningful paragraph, then answer the questions given below.

A Study to this effects suggests that the average white-collar worker demonstrates only about 25% listening efficiency.
However for trained and good listeners it is not unusual to use all the three approaches during a setting, thus improving listening efficiency.
There are three approaches to listening: Listening for comprehension, Listening for empathy and Listening for evaluation.
Although we spend nearly half of each communication interaction listening, we do not listen well.
Each approach has a particular emphasis that may help us to receive and process information in different settings.

1

2

3

5

The paragraph talks about the different approaches to listening and how they can improve listening efficiency. Sentence 5 states that each approach has a particular emphasis that can help us receive and process information in different settings. This sentence serves as a conclusion to the paragraph, summarizing the main point being discussed. Therefore, sentence 5 should be the last sentence in the paragraph.

Explanation

The paragraph talks about the different approaches to listening and how they can improve listening efficiency. Sentence 5 states that each approach has a particular emphasis that can help us receive and process information in different settings. This sentence serves as a conclusion to the paragraph, summarizing the main point being discussed. Therefore, sentence 5 should be the last sentence in the paragraph.

17. The following is (are) laws of black body radiation.

Plank’s law

Stefan-Boltzmann law

Both (A) and (B)

None of the above

Both Plank's law and Stefan-Boltzmann law are laws of black body radiation. Plank's law describes the spectral energy density of radiation emitted by a black body at a given temperature, while Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body is proportional to the fourth power of its absolute temperature. Therefore, the correct answer is both (A) and (B).

Explanation

Both Plank's law and Stefan-Boltzmann law are laws of black body radiation. Plank's law describes the spectral energy density of radiation emitted by a black body at a given temperature, while Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body is proportional to the fourth power of its absolute temperature. Therefore, the correct answer is both (A) and (B).

18. A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?

65 sec

89 sec

100 sec

150 sec

To find out how long it will take for the train to pass a platform 650 meters long, you need to consider both the length of the train and the length of the platform. The train is 240 meters long, and it takes 24 seconds to pass a pole. This means its speed, or the rate at which it travels, is: Speed = Distance / Time Speed = 240 meters / 24 seconds Speed = 10 meters per second

Now, when the train passes a platform, it has to cover the length of both the train and the platform. So, the total distance it needs to cover is 240 meters (train) + 650 meters (platform) = 890 meters. To find the time it takes to pass the platform, you can use the same speed: Time = Distance / Speed Time = 890 meters / 10 meters per second Time = 89 seconds So, it will take 89 seconds for the train to pass a platform that is 650 meters long.

Explanation

To find out how long it will take for the train to pass a platform 650 meters long, you need to consider both the length of the train and the length of the platform. The train is 240 meters long, and it takes 24 seconds to pass a pole. This means its speed, or the rate at which it travels, is: Speed = Distance / Time Speed = 240 meters / 24 seconds Speed = 10 meters per second

Now, when the train passes a platform, it has to cover the length of both the train and the platform. So, the total distance it needs to cover is 240 meters (train) + 650 meters (platform) = 890 meters. To find the time it takes to pass the platform, you can use the same speed: Time = Distance / Speed Time = 890 meters / 10 meters per second Time = 89 seconds So, it will take 89 seconds for the train to pass a platform that is 650 meters long.

19. Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:

15

16

18

25

Tanya is 25% more efficient than Sakshi, which means she can do the same amount of work in 75% of the time it takes Sakshi. Therefore, Tanya will take 75% of 20 days to complete the work. Calculating this, we get 0.75 * 20 = 15 days. However, the given options do not include 15, so the closest option is 16, which is the correct answer.

Explanation

Tanya is 25% more efficient than Sakshi, which means she can do the same amount of work in 75% of the time it takes Sakshi. Therefore, Tanya will take 75% of 20 days to complete the work. Calculating this, we get 0.75 * 20 = 15 days. However, the given options do not include 15, so the closest option is 16, which is the correct answer.

20. Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. What is the speed of the boat in still water? I. The speed downstream is 12 kmph. II. The speed upstream is 4 kmph. III. In a to and fro journey between two points, the average speed of the boat was 6 kmph.

I and II only

All I, II and III

III, and either I or II

Any two of the three

To determine the speed of the boat in still water, we need to consider the speed downstream and the speed upstream. By combining statements I and II, we can calculate the speed of the boat in still water using the formula: (speed downstream + speed upstream) / 2. Therefore, any two of the three statements (I, II, III) are necessary to answer the question.

Explanation

To determine the speed of the boat in still water, we need to consider the speed downstream and the speed upstream. By combining statements I and II, we can calculate the speed of the boat in still water using the formula: (speed downstream + speed upstream) / 2. Therefore, any two of the three statements (I, II, III) are necessary to answer the question.

Aptitude Test: Esvc18 Placement Drive