Aerospace Ground Equipment CDC Vol. 2
This is from the latest updated CDC set (Change 05)
Questions and Answers
- 1.
Every atom must contain what types of particles?
- A.
Electrons and protons
- B.
Electrons and neutrons
- C.
Protons and neutrons
- D.
Electrons, protons, and neutrons
Correct Answer
A. Electrons and protonsExplanation
Every atom must contain electrons and protons. Electrons are negatively charged particles that orbit around the nucleus of an atom, while protons are positively charged particles located in the nucleus. These two particles are essential for the stability and structure of an atom. Neutrons, on the other hand, are neutral particles and are not required in every atom, although they can be present in some atoms to provide stability.Rate this question:
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- 2.
An atom with eight electrons in its outermost shell is said to be
- A.
Free
- B.
Stable
- C.
Valence
- D.
Ionized
Correct Answer
B. StableExplanation
An atom with eight electrons in its outermost shell is said to be stable. This is because the outermost shell, also known as the valence shell, is considered complete when it contains eight electrons. This configuration is known as the octet rule and is commonly observed in noble gases, which have full outer shells and are therefore very stable. In contrast, atoms with fewer or more than eight electrons in their outermost shell tend to be reactive and less stable, as they seek to gain, lose, or share electrons to achieve a stable configuration.Rate this question:
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- 3.
How many valence electrons are needed to make a good conductor?
- A.
3
- B.
4
- C.
5
- D.
6
Correct Answer
A. 3Explanation
A good conductor requires a small number of valence electrons to easily move through the material. This allows for the efficient flow of electric current. Therefore, having only 3 valence electrons would make a material a good conductor as it would have less resistance to the movement of electrons.Rate this question:
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- 4.
"Dielectric" is the term used for
- A.
Conductors
- B.
Insulators
- C.
Doped atoms
- D.
Semi-conductors
Correct Answer
B. InsulatorsExplanation
The term "dielectric" is used to refer to insulators. Insulators are materials that do not conduct electricity well and have high resistance to the flow of electric current. Dielectrics are commonly used in capacitors and other electrical devices to store and distribute electrical energy. They are characterized by their ability to store electric charge when an electric field is applied to them. Unlike conductors, which allow the flow of electrons, dielectrics prevent the flow of electrons and act as an electrical insulator.Rate this question:
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- 5.
"The flow or drift of electrons through a conductor" in the same direction at the same time is the definition of
- A.
Conductivity
- B.
Voltage
- C.
Current
- D.
Valence
Correct Answer
C. CurrentExplanation
Current is defined as the flow or drift of electrons through a conductor in the same direction at the same time. It is the movement of electric charge, typically measured in amperes, and is responsible for the transfer of energy and the operation of electrical devices. Conductivity refers to the ability of a material to conduct electric current, voltage is the potential difference between two points in a circuit, and valence refers to the combining capacity of an atom.Rate this question:
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- 6.
The potential difference between two points in a circuit that exerts a force on free electrons is called
- A.
Conductivity
- B.
Voltage
- C.
Current
- D.
Valence
Correct Answer
B. VoltageExplanation
Voltage is the correct answer because potential difference is the measure of the electrical force that pushes the free electrons in a circuit. It is the force that causes the flow of electrons, also known as electric current. Conductivity refers to the ability of a material to conduct electricity, while valence is a property of atoms.Rate this question:
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- 7.
What is used to control current flow in a circuit?
- A.
Voltage
- B.
Coulombs
- C.
Resistance
- D.
Conductivity
Correct Answer
C. ResistanceExplanation
Resistance is used to control current flow in a circuit. It is a property of a material or component that opposes the flow of electric current. When resistance is increased, the current flow decreases, and when resistance is decreased, the current flow increases. This is achieved by using resistors in the circuit, which are designed to have a specific resistance value. By adjusting the resistance, the amount of current flowing through the circuit can be controlled.Rate this question:
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- 8.
The relationship of voltage, current, and resistance is expressed through
- A.
E, I, and C
- B.
Power formulas
- C.
Conductance
- D.
Ohm's Law
Correct Answer
D. Ohm's LawExplanation
Ohm's Law is the correct answer because it expresses the relationship between voltage (E), current (I), and resistance (C). According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor. This relationship is expressed by the equation I = E/C, where I is the current, E is the voltage, and C is the resistance. Ohm's Law is a fundamental principle in electrical circuits and is used to calculate and understand the behavior of electrical systems.Rate this question:
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- 9.
Total current in a series circuit is equal to the
- A.
Current through one component
- B.
Sum of the current through each componenet
- C.
Reciprocal of the current through one componenet
- D.
Reciprocal of the sum of the current through each component
Correct Answer
A. Current through one componentExplanation
In a series circuit, the current is the same throughout all components. This means that the total current in the circuit is equal to the current through one component. Therefore, the correct answer is "current through one component".Rate this question:
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- 10.
What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
- A.
.14 watts (w)
- B.
.14 kilowatts (kw)
- C.
3.92 w.
- D.
3.92 kw.
Correct Answer
D. 3.92 kw.Explanation
The wattage of a circuit can be calculated using the formula P = V^2 / R, where P is the power in watts, V is the voltage in volts, and R is the resistance in ohms. In this case, the voltage is 28 volts and the resistance is 0.2 ohms. Plugging these values into the formula, we get P = 28^2 / 0.2 = 784 / 0.2 = 3920 watts. Since the question asks for the wattage in kilowatts, we divide the result by 1000 to get 3.92 kilowatts.Rate this question:
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- 11.
In a parallel circuit, the total voltage is equal to the
- A.
Sum of the voltages across each branch
- B.
Voltage across each resistor
- C.
Voltage across each branch
- D.
The reciprocal of the voltage across the resistances
Correct Answer
C. Voltage across each branchExplanation
In a parallel circuit, the total voltage is equal to the voltage across each branch. This is because in a parallel circuit, each branch has its own separate path for current flow. Therefore, the voltage across each branch remains constant and is equal to the total voltage of the circuit.Rate this question:
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- 12.
Source current in a parallel circuit will be divided according to branch
- A.
Voltage
- B.
Powers
- C.
Lengths
- D.
Resistances
Correct Answer
D. ResistancesExplanation
In a parallel circuit, the current flowing through each branch is determined by the resistance of that branch. This is because the total current entering the parallel circuit is divided among the different branches based on their resistance values. The branch with a lower resistance will allow more current to flow through it, while the branch with a higher resistance will allow less current to flow through it. Therefore, the statement that the source current in a parallel circuit will be divided according to resistances is correct.Rate this question:
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- 13.
The area around a magnet where its influence can be felt is the definition of the
- A.
Saturation principle
- B.
Magnetic theory
- C.
Magnetic field
- D.
Law of attraction and repulsion
Correct Answer
C. Magnetic fieldExplanation
A magnetic field refers to the area around a magnet where its influence can be felt. It is a region in which magnetic forces are exerted on other objects or magnets. This field is responsible for the attraction or repulsion between magnets and the interaction between magnets and magnetic materials. Therefore, the correct answer is magnetic field.Rate this question:
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- 14.
"the ability of a material to pass lines of force" is a definition of
- A.
Permeability
- B.
Reluctance
- C.
Electromagnetism
- D.
Retentivity
Correct Answer
A. PermeabilityExplanation
Permeability refers to the ability of a material to allow lines of force to pass through it. It is a measure of how easily magnetic flux can pass through a substance. Materials with high permeability allow a greater amount of magnetic flux to pass through, while materials with low permeability impede the flow of magnetic flux. Permeability is an important property in electromagnetism and is used to describe the behavior of magnetic materials in the presence of a magnetic field.Rate this question:
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- 15.
The magnetism that remains after the magnetizing force has been removed is known as
- A.
Electromagnetism
- B.
Molecular magnetism
- C.
Permeability
- D.
Risidual magnetism
Correct Answer
D. Risidual magnetismExplanation
Residual magnetism refers to the magnetism that remains in a material even after the magnetizing force has been removed. This phenomenon occurs when the magnetic domains within the material align in a specific direction due to the applied magnetic field. The alignment of these domains creates a net magnetic field within the material, resulting in residual magnetism.Rate this question:
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- 16.
The magnetic field of an electromagnet can be varied by changing the
- A.
Type of core
- B.
Number of turns in the coil
- C.
Amount of current through the coil
- D.
All of the above.
Correct Answer
D. All of the above.Explanation
The magnetic field of an electromagnet can be varied by changing the type of core, the number of turns in the coil, and the amount of current through the coil. The type of core affects the strength of the magnetic field, with different materials having different magnetic properties. Increasing the number of turns in the coil increases the magnetic field strength, as each turn contributes to the overall field. Finally, increasing the amount of current flowing through the coil increases the strength of the magnetic field according to Ampere's law. Therefore, all of the above options can be used to vary the magnetic field of an electromagnet.Rate this question:
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- 17.
The electromechanical generation of a voltage requires a magnetic field, relative motion, and
- A.
A complete circuit
- B.
A conductor
- C.
An insulator
- D.
A load
Correct Answer
B. A conductorExplanation
In order to generate a voltage electromechanically, a conductor is necessary. A conductor is a material that allows the flow of electric current. When there is relative motion between a magnetic field and a conductor, it induces a voltage in the conductor according to Faraday's law of electromagnetic induction. This voltage can then be used to create an electric current in a complete circuit, which can power a load. Therefore, a conductor is an essential component for the electromechanical generation of a voltage.Rate this question:
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- 18.
The principle behind all electromechanical generation is
- A.
Conduction
- B.
Commutation
- C.
Rectification
- D.
Electromagnetic induction
Correct Answer
D. Electromagnetic inductionExplanation
Electromagnetic induction is the principle behind all electromechanical generation. This principle states that when a conductor moves through a magnetic field or when there is a change in the magnetic field around a conductor, an electromotive force (EMF) is induced in the conductor. This induced EMF can then be used to generate electricity in various electromechanical devices such as generators and transformers. Electromagnetic induction is a fundamental concept in physics and plays a crucial role in the functioning of many electrical power systems.Rate this question:
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- 19.
The function of the commutator in a DC generator is to
- A.
Complete the circuit to the load
- B.
Induce DC into the external circuit
- C.
Rectify the input
- D.
Change AC voltage to DC voltage
Correct Answer
D. Change AC voltage to DC voltageExplanation
The commutator in a DC generator is responsible for converting the alternating current (AC) produced by the generator into direct current (DC) voltage. It achieves this by reversing the direction of the current in the external circuit at the appropriate moment, ensuring that the output voltage remains constant and flows in a single direction. This process of commutation allows the generator to produce a steady and continuous flow of DC voltage, which is essential for many electrical applications.Rate this question:
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- 20.
Because an inductor stores energy and then returns it to the circuit, it is called a
- A.
Resistive device
- B.
Reactive device
- C.
Retentive device
- D.
Retroactive device
Correct Answer
B. Reactive deviceExplanation
An inductor is called a reactive device because it stores energy in its magnetic field when current flows through it. This stored energy is then returned to the circuit when the current changes or is interrupted. Unlike resistive devices, which dissipate energy in the form of heat, inductors do not consume power but rather store and release it. Therefore, the term "reactive" accurately describes the behavior of an inductor in a circuit.Rate this question:
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- 21.
An inductor stores energy in the form of
- A.
Heat
- B.
Resistance
- C.
A magnetic field
- D.
An electrostatic field
Correct Answer
C. A magnetic fieldExplanation
An inductor stores energy in the form of a magnetic field. When current flows through an inductor, a magnetic field is created around it. This magnetic field stores energy, which can be released when the current is interrupted or changed. This property of inductors is utilized in various applications such as transformers, motors, and generators, where the stored energy in the magnetic field is converted into useful work.Rate this question:
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- 22.
The process by which a current change in one coil produces a voltage in another coil is called
- A.
Inductance
- B.
Self-induction
- C.
Mutual induction
- D.
None of the above
Correct Answer
C. Mutual inductionExplanation
Mutual induction is the process by which a current change in one coil induces a voltage in another coil. This occurs when the magnetic field produced by the changing current in one coil cuts through the turns of the second coil, causing a voltage to be induced. This phenomenon is commonly used in transformers, where mutual induction is utilized to transfer electrical energy from one coil to another. Inductance refers to the property of a coil to oppose changes in current, while self-induction is the induction of a voltage in the same coil due to changes in current.Rate this question:
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- 23.
A transformer will change all of the following except
- A.
Power
- B.
Current
- C.
Voltage
- D.
Resistance
Correct Answer
A. PowerExplanation
A transformer is an electrical device that is used to transfer electrical energy between two or more circuits through electromagnetic induction. It works by changing the voltage and current levels of the input electrical energy to the desired levels in the output circuit. However, the transformer does not change the power. Power is the product of voltage and current, and in a transformer, the power in the input circuit is equal to the power in the output circuit. Therefore, the correct answer is power.Rate this question:
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- 24.
Normally, the winding of a transformer that is connected to a power source is known as the
- A.
Field winding
- B.
Primary winding
- C.
Current winding
- D.
Secondary winding
Correct Answer
B. Primary windingExplanation
The winding of a transformer that is connected to a power source is known as the primary winding. This is because the primary winding is responsible for receiving the electrical energy from the power source and transferring it to the secondary winding. The primary winding typically has a higher number of turns compared to the secondary winding, allowing it to step up or step down the voltage as required by the transformer.Rate this question:
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- 25.
What kind of turns of wire is found in the secondary windings of a step up transformer?
- A.
Equal
- B.
Less
- C.
More
- D.
All of the above
Correct Answer
C. MoreExplanation
In the secondary windings of a step-up transformer, the turns of wire are more than the turns of wire in the primary windings. This is because a step-up transformer is designed to increase the voltage from the primary side to the secondary side. By having more turns of wire in the secondary windings, the transformer can effectively step up the voltage.Rate this question:
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- 26.
A relay is an electrically operated
- A.
Meter
- B.
Motor
- C.
Switch
- D.
Safety device
Correct Answer
C. SwitchExplanation
A relay is an electrically operated switch. It is a device that allows a low-power signal to control a high-power circuit. When the relay receives an electrical signal, it activates an electromagnet which then opens or closes the switch contacts, allowing or interrupting the flow of current in the circuit. This makes it a versatile component used in various applications where a low-power control signal needs to control a high-power circuit.Rate this question:
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- 27.
A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
- A.
Locking relay
- B.
Latching relay
- C.
Timing relay
- D.
Tripping relay
Correct Answer
B. Latching relayExplanation
A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a latching relay. This type of relay "latches" or holds its position until a separate signal is received to release it. It is commonly used in applications where it is necessary to maintain a specific state until a reset signal is received. Unlike other relays that return to their original position once the power is removed, a latching relay remains in its last position until specifically reset.Rate this question:
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- 28.
A capacitor stores energy in the form of
- A.
Heat
- B.
Resistance
- C.
A magnetic field
- D.
An electrostatic field
Correct Answer
D. An electrostatic fieldExplanation
A capacitor stores energy in the form of an electrostatic field. When a voltage is applied across the capacitor, it creates an electric field between its two plates. This electric field causes the accumulation of positive and negative charges on the plates, creating an electrostatic field. The energy is stored in this field, and when the capacitor is discharged, the energy is released back into the circuit. This is why capacitors are commonly used in electronic devices for energy storage and power regulation.Rate this question:
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- 29.
In a capacitor, the dielectric is the
- A.
Positive lead
- B.
Conductor
- C.
Insulator
- D.
Outer case
Correct Answer
C. InsulatorExplanation
In a capacitor, the dielectric is the insulator. The dielectric is a material that is placed between the plates of a capacitor to increase its capacitance. It acts as an electrical insulator, preventing the flow of direct current between the plates while allowing the storage of electric charge. The dielectric material can be made from various substances such as ceramic, plastic, or paper. Its main purpose is to reduce the electric field strength between the plates, thereby increasing the capacitance of the capacitor.Rate this question:
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- 30.
Opposition of a capacitor to AC is called
- A.
Inductive reactance
- B.
Impedance
- C.
Capacitive reactance
- D.
Capacitance
Correct Answer
C. Capacitive reactanceExplanation
Capacitive reactance is the opposition that a capacitor exhibits to the flow of alternating current (AC). It is caused by the storage and release of electrical energy in the capacitor. When AC is applied to a capacitor, the capacitor charges and discharges, resulting in a phase shift between the voltage and current. This opposition is known as capacitive reactance, and it is measured in ohms. It is the opposite of inductive reactance, which is the opposition exhibited by an inductor to AC. Impedance, on the other hand, is the overall opposition to the flow of AC in a circuit and includes both resistance and reactance. Capacitance refers to the ability of a capacitor to store electrical energy.Rate this question:
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- 31.
The factors which determine the time required to charge a capacitor are the capacitance and the
- A.
Applied voltage
- B.
Circuit current
- C.
Amount of resistance
- D.
Type of dielectric
Correct Answer
C. Amount of resistanceExplanation
The amount of resistance is a factor that determines the time required to charge a capacitor. Resistance limits the flow of current in the circuit, which affects the rate at which the capacitor charges. A higher resistance will slow down the charging process, while a lower resistance will allow the capacitor to charge more quickly. Therefore, the amount of resistance in the circuit plays a crucial role in determining the charging time of a capacitor.Rate this question:
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- 32.
The anode of a diode is constructed of
- A.
Neutral material
- B.
Biased material
- C.
Positive material
- D.
Negative material
Correct Answer
C. Positive materialExplanation
The anode of a diode is typically made of a positive material. In a diode, current can only flow in one direction, from the anode to the cathode. The anode is positively charged, while the cathode is negatively charged. When a forward bias voltage is applied, the positive material in the anode attracts the negatively charged electrons, allowing current to flow through the diode. Therefore, the anode is made of positive material to facilitate the flow of current in the desired direction.Rate this question:
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- 33.
Expanding or contracting the depletion region of a diode is called
- A.
Basing
- B.
Gating
- C.
Spiking
- D.
Biasing
Correct Answer
D. BiasingExplanation
Biasing refers to the process of applying a DC voltage to a diode or transistor in order to establish a desired operating point. By applying a bias voltage, the depletion region of a diode can be expanded or contracted, allowing or preventing the flow of current through the diode. This is essential for controlling the behavior of the diode and ensuring it operates within its desired range. Therefore, biasing is the correct term for expanding or contracting the depletion region of a diode.Rate this question:
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- 34.
A diode placed in a circuit in reverse bias is being used as
- A.
A spike protector
- B.
An amplifier
- C.
A regulator
- D.
A rectifier
Correct Answer
A. A spike protectorExplanation
When a diode is placed in reverse bias, it allows only a very small amount of current to flow in the opposite direction. This makes it useful as a spike protector in a circuit. When a voltage spike occurs, the diode acts as a barrier, preventing the spike from damaging the rest of the circuit. Therefore, the correct answer is a spike protector.Rate this question:
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- 35.
A zener will conduct in reverse bias
- A.
For a second or two at a time
- B.
Until gate potantial has been reached
- C.
Once the avalanche point has been reached
- D.
Until the breakdown point has been reached
Correct Answer
C. Once the avalanche point has been reachedExplanation
Once the avalanche point has been reached, a zener diode will conduct in reverse bias. The avalanche breakdown occurs when the voltage across the diode exceeds a certain threshold, causing a rapid increase in current flow. At this point, the diode enters the breakdown region and starts conducting in reverse bias. Therefore, once the avalanche point is reached, the zener diode will conduct.Rate this question:
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- 36.
A zener being used as a regulator must have a resistor placed in the circuit in
- A.
Series
- B.
Parallel
- C.
Reverse bias
- D.
Series-parallel
Correct Answer
A. SeriesExplanation
When a zener diode is used as a regulator, it is necessary to have a resistor placed in series with it in the circuit. This resistor helps to limit the current flowing through the zener diode and ensures that it operates within its specified voltage range. By placing the resistor in series, it allows the zener diode to regulate the voltage across the load by maintaining a constant voltage drop across itself. This configuration is commonly used in voltage regulator circuits to provide a stable output voltage.Rate this question:
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- 37.
What is the approximate operating voltage of a LED?
- A.
.5 volts
- B.
.1 volts
- C.
1.6 volts
- D.
2.4 volts
Correct Answer
C. 1.6 voltsExplanation
LEDs (Light Emitting Diodes) are semiconductor devices that emit light when an electric current passes through them. They have a specific forward voltage drop, which is the approximate voltage required for them to function properly. The approximate operating voltage of a LED is commonly around 1.6 volts. This voltage may vary slightly depending on the specific type and color of the LED, but 1.6 volts is a typical value.Rate this question:
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- 38.
The SCR has how many PN junctions?
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
C. ThreeExplanation
The Silicon Controlled Rectifier (SCR) has three PN junctions. This semiconductor device consists of three layers of alternating P-type and N-type materials. The two outer layers are P-type, and the middle layer is N-type. The junctions between these layers form the three PN junctions. These junctions play a crucial role in the operation of the SCR, allowing it to control the flow of electric current effectively.Rate this question:
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- 39.
The amount of current required to gate an SCR is called
- A.
Forward breakover voltage
- B.
Holding current
- C.
Peak voltage
- D.
Gate current
Correct Answer
A. Forward breakover voltageExplanation
The forward breakover voltage refers to the minimum voltage required to trigger the SCR into conduction when a positive gate current is applied. It is the threshold voltage that must be exceeded for the SCR to start conducting current. The holding current, on the other hand, is the minimum current required to maintain conduction once the SCR has been triggered. Peak voltage refers to the maximum voltage that the SCR can withstand without breakdown. Gate current is the current that is applied to the gate terminal of the SCR to control its conduction.Rate this question:
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- 40.
In order for an SCR to be turned off
- A.
The forward breakover voltage must exceed the holding voltage
- B.
The current must drop below the holding current
- C.
The negative amp switch must activate
- D.
The negative volt switch must activate
Correct Answer
B. The current must drop below the holding currentExplanation
When the current flowing through an SCR drops below the holding current, the SCR will turn off. The holding current is the minimum current required to maintain conduction in the SCR once it has been triggered. Therefore, if the current drops below this threshold, the SCR will stop conducting and turn off. This is the condition that needs to be met for the SCR to be turned off.Rate this question:
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- 41.
The best method of troubleshooting is the
- A.
Systematic method
- B.
Instantaneous method
- C.
Hit-and-miss method
- D.
Trial-and-error method
Correct Answer
A. Systematic methodExplanation
The systematic method is the best method of troubleshooting because it involves a step-by-step approach to identify and solve problems. It allows for a logical and organized process, ensuring that all possible causes are considered and systematically eliminated until the root cause is found. This method minimizes the chances of missing any important steps or overlooking potential solutions, leading to more efficient and effective troubleshooting.Rate this question:
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- 42.
Which troubleshooting step is done by knowing proper equipment operation?
- A.
Analysis
- B.
Recognition
- C.
Repair and check
- D.
Elimination and isolation
Correct Answer
B. RecognitionExplanation
Recognition is the troubleshooting step that is done by knowing proper equipment operation. This step involves identifying the symptoms and issues related to the equipment based on the knowledge of how it should operate. By recognizing the normal operation of the equipment, it becomes easier to identify any deviations or abnormalities that may indicate a problem. This step is crucial in the troubleshooting process as it helps in narrowing down the potential causes of the issue and determining the appropriate course of action.Rate this question:
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- 43.
During which troubleshooting step do you try to determine which system could cause the malfunction?
- A.
Analysis
- B.
Verification
- C.
Recognition
- D.
Elimination and isolation
Correct Answer
A. AnalysisExplanation
During the analysis step of troubleshooting, you try to determine which system could be causing the malfunction by gathering information, examining symptoms, and identifying potential causes. This involves reviewing any available logs, conducting tests, and analyzing data to narrow down the possible sources of the problem. By carefully analyzing the situation, you can gain insights into the underlying issues and make informed decisions about the next steps in the troubleshooting process.Rate this question:
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- 44.
During which troubleshooting step do you first use the schematic diagram?
- A.
Recognition
- B.
Verification
- C.
Analysis
- D.
Isolation
Correct Answer
C. AnalysisExplanation
The schematic diagram is used during the analysis step of troubleshooting. This step involves examining the schematic diagram to understand the circuitry and identify potential issues or faulty components. By analyzing the diagram, technicians can gain insights into how the system works and determine the most likely cause of the problem. This allows them to develop an effective plan for further troubleshooting and resolving the issue.Rate this question:
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- 45.
Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
- A.
Zones
- B.
Schematic
- C.
Wiring Diagram
- D.
Reference designation index
Correct Answer
D. Reference designation indexExplanation
The reference designation index is designed to aid you if you see an unfamiliar symbol. It provides a list of symbols used in a schematic or wiring diagram along with their corresponding reference designations, helping you identify and understand the meaning of the symbols. This can be particularly useful when troubleshooting electrical or electronic systems, as it allows you to quickly locate and interpret unfamiliar symbols, enabling effective problem-solving.Rate this question:
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- 46.
Which troubleshooting aid is designed to aid you in finding components on a diagram?
- A.
Zones
- B.
Schematic
- C.
Wiring Diagram
- D.
Reference designation index
Correct Answer
A. ZonesExplanation
Zones are a troubleshooting aid that are designed to aid in finding components on a diagram. They divide a diagram into different sections or areas, making it easier to locate specific components or areas of interest. By using zones, technicians can quickly identify and navigate to the relevant parts of a diagram, saving time and effort in troubleshooting and repair tasks.Rate this question:
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- 47.
When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
- A.
In series
- B.
To ground
- C.
In parallel
- D.
In series-parallel
Correct Answer
C. In parallelExplanation
A multimeter is connected in parallel when used in a series circuit to measure voltage. This means that the multimeter is connected across the component or load being measured, allowing the voltage to be measured directly. Connecting the multimeter in parallel ensures that it does not interfere with the circuit and accurately measures the voltage across the component without affecting the circuit's overall current flow.Rate this question:
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- 48.
To set a value to the height of the oscilloscope grid markings, you adjust the
- A.
Focus
- B.
Pitch control
- C.
Voltage selector
- D.
Time sweep selector
Correct Answer
C. Voltage selectorExplanation
The voltage selector is used to set the value of the height of the oscilloscope grid markings. By adjusting the voltage selector, you can control the vertical position of the waveform being displayed on the oscilloscope screen. This allows you to accurately measure and analyze the voltage levels of the signal being observed. The focus control is used to adjust the sharpness and clarity of the waveform, while the pitch control is used to adjust the horizontal position of the waveform. The time sweep selector is used to control the speed at which the waveform is displayed on the screen.Rate this question:
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- 49.
To ensure accuracy of the oscilloscope when preparing for operation, you should always
- A.
Zero the display
- B.
Center the display
- C.
Identify the cal point and adjust to zero
- D.
Identify the cal point and calibrate the display
Correct Answer
D. Identify the cal point and calibrate the displayExplanation
To ensure accuracy of the oscilloscope, it is important to identify the calibration point, which is a known reference signal, and then calibrate the display accordingly. This process helps to align the measurements on the oscilloscope with the actual values of the signals being measured. Zeroing the display and centering the display are not sufficient for accurate operation, as they do not involve calibration. Hence, the correct answer is to identify the cal point and calibrate the display.Rate this question:
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- 50.
When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
- A.
A beep
- B.
An extending analog bar graph
- C.
OL
- D.
0 ohms
Correct Answer
C. OLExplanation
When testing a transformer, an open coil reading on the 8025A multimeter will be indicated by "OL" which stands for "Open Loop". This means that there is no continuity or connection in the coil, indicating that the coil is open or broken. This reading suggests that there is a fault in the transformer and it needs to be repaired or replaced.Rate this question:
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Mar 21, 2023Quiz Edited by
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Aug 06, 2012Quiz Created by
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