Aerospace Ground Equipment CDC Vol. 2

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  • 1/60 Questions

    What is used to control current flow in a  circuit?

    • Voltage
    • Coulombs
    • Resistance
    • Conductivity
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Electrical Principles Quizzes & Trivia
About This Quiz

This quiz, titled 'Aerospace Ground Equipment CDC Vol. 2', assesses foundational knowledge in electrical principles, focusing on atomic structure, electron flow, and electrical properties such as voltage and current. It's designed to enhance understanding and skills relevant to aerospace ground equipment.

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  • 2. 

    The relationship of voltage, current, and resistance is expressed through

    • E, I, and C

    • Power formulas

    • Conductance

    • Ohm's Law

    Correct Answer
    A. Ohm's Law
    Explanation
    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.

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  • 3. 

    A relay is an electrically operated

    • Meter

    • Motor

    • Switch

    • Safety device

    Correct Answer
    A. Switch
    Explanation
    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.

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  • 4. 

    The area around a magnet where its influence can be felt is the definition of the

    • Saturation principle

    • Magnetic theory

    • Magnetic field

    • Law of attraction and repulsion

    Correct Answer
    A. Magnetic field
    Explanation
    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.

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  • 5. 

    The magnetic field of an electromagnet can be varied by changing the

    • Type of core

    • Number of turns in the coil

    • Amount of current through the coil

    • All of the above.

    Correct Answer
    A. 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.

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  • 6. 

    The best method of troubleshooting is the

    • Systematic method

    • Instantaneous method

    • Hit-and-miss method

    • Trial-and-error method

    Correct Answer
    A. Systematic method
    Explanation
    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.

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  • 7. 

    The magnetism that remains after the magnetizing force has been removed is known as

    • Electromagnetism

    • Molecular magnetism

    • Permeability

    • Risidual magnetism

    Correct Answer
    A. Risidual magnetism
    Explanation
    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.

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  • 8. 

    "The flow or drift of electrons through a conductor" in the same direction at the same time is the definition of

    • Conductivity

    • Voltage

    • Current

    • Valence

    Correct Answer
    A. Current
    Explanation
    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.

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  • 9. 

    The potential difference between two points in a circuit that exerts a force on free electrons is called

    • Conductivity

    • Voltage

    • Current

    • Valence

    Correct Answer
    A. Voltage
    Explanation
    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.

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  • 10. 

    An atom with eight electrons in its outermost shell is said to be

    • Free

    • Stable

    • Valence

    • Ionized

    Correct Answer
    A. Stable
    Explanation
    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.

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  • 11. 

    "Dielectric" is the term used for

    • Conductors

    • Insulators

    • Doped atoms

    • Semi-conductors

    Correct Answer
    A. Insulators
    Explanation
    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.

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  • 12. 

    The principle behind all electromechanical generation is

    • Conduction

    • Commutation

    • Rectification

    • Electromagnetic induction

    Correct Answer
    A. Electromagnetic induction
    Explanation
    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.

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  • 13. 

    How many valence electrons are needed to make a good conductor?

    • 3

    • 4

    • 5

    • 6

    Correct Answer
    A. 3
    Explanation
    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.

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  • 14. 

    The electromechanical generation of a voltage requires a magnetic field, relative motion, and

    • A complete circuit

    • A conductor

    • An insulator

    • A load

    Correct Answer
    A. A conductor
    Explanation
    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.

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  • 15. 

    Normally, the winding of a transformer that is connected to a power source is known as the

    • Field winding

    • Primary winding

    • Current winding

    • Secondary winding

    Correct Answer
    A. Primary winding
    Explanation
    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.

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  • 16. 

    The SCR has how many PN junctions?

    • One

    • Two

    • Three

    • Four

    Correct Answer
    A. Three
    Explanation
    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.

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  • 17. 

    In a capacitor, the dielectric is the

    • Positive lead

    • Conductor

    • Insulator

    • Outer case

    Correct Answer
    A. Insulator
    Explanation
    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.

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  • 18. 

    A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be

    • Tinned

    • Clean of solder

    • Replaced

    • Checked for length

    Correct Answer
    A. Tinned
    Explanation
    When a soldering iron tip becomes pitted or worn, it can affect the quality of solder joints. Tinning the tip involves coating it with a thin layer of solder, which helps to improve heat transfer and prevent oxidation. This process restores the tip's functionality and extends its lifespan. Therefore, the correct answer is tinned.

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  • 19. 

    "the ability of a material to pass lines of force" is a definition of

    • Permeability

    • Reluctance

    • Electromagnetism

    • Retentivity

    Correct Answer
    A. Permeability
    Explanation
    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.

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  • 20. 

    What kind of turns of wire is found in the secondary windings of a step up transformer?

    • Equal

    • Less

    • More

    • All of the above

    Correct Answer
    A. More
    Explanation
    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.

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  • 21. 

    Every atom must contain what types of particles?

    • Electrons and protons

    • Electrons and neutrons

    • Protons and neutrons

    • Electrons, protons, and neutrons

    Correct Answer
    A. Electrons and protons
    Explanation
    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.

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  • 22. 

    The function of the commutator in a DC generator is to

    • Complete the circuit to the load

    • Induce DC into the external circuit

    • Rectify the input

    • Change AC voltage to DC voltage

    Correct Answer
    A. Change AC voltage to DC voltage
    Explanation
    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.

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  • 23. 

    The process by which a current change in one coil produces a voltage in another coil is called

    • Inductance

    • Self-induction

    • Mutual induction

    • None of the above

    Correct Answer
    A. Mutual induction
    Explanation
    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.

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  • 24. 

    A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a

    • Locking relay

    • Latching relay

    • Timing relay

    • Tripping relay

    Correct Answer
    A. Latching relay
    Explanation
    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.

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  • 25. 

    Because an inductor stores energy and then returns it to the circuit, it is called a

    • Resistive device

    • Reactive device

    • Retentive device

    • Retroactive device

    Correct Answer
    A. Reactive device
    Explanation
    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.

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  • 26. 

    The first step in soldering a conductor is to

    • Wick the wire

    • Remove the insulation

    • Apply heat to the connection

    • Apply solder to the connection

    Correct Answer
    A. Remove the insulation
    Explanation
    The correct answer is to remove the insulation. When soldering a conductor, the first step is to remove the insulation from the wire. This is necessary to expose the bare metal surface of the conductor, which allows for proper soldering. Insulation can hinder the flow of heat and prevent the solder from bonding effectively. By removing the insulation, the bare wire is ready to be heated and soldered to create a strong and reliable connection.

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  • 27. 

    The best method of repairing a lifted circuit track on a PCB is to

    • Bond it

    • Glue it

    • Replace it with bare wire

    • Replace it with insulated wire

    Correct Answer
    A. Replace it with insulated wire
    Explanation
    The best method of repairing a lifted circuit track on a PCB is to replace it with insulated wire. This is because insulated wire provides better insulation and protection against short circuits compared to bare wire. Additionally, using insulated wire helps to maintain the integrity of the circuit and prevent further damage. Bonding or gluing the lifted circuit track may not provide a secure and reliable connection, and it may not provide the necessary insulation.

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  • 28. 

    The anode of a diode is constructed of

    • Neutral material

    • Biased material

    • Positive material

    • Negative material

    Correct Answer
    A. Positive material
    Explanation
    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.

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  • 29. 

    What is the approximate operating voltage of a LED?

    • .5 volts

    • .1 volts

    • 1.6 volts

    • 2.4 volts

    Correct Answer
    A. 1.6 volts
    Explanation
    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.

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  • 30. 

    How can you identify an electrostatic sensitive device?

    • The package will have special coloraing as specified in local directives

    • The package will have a special control number as specified in local directives

    • It will be marked with the MIL-STD-129 symbol or a caution marking

    • It will be marked with the MIL-SPC-235 symbol or a warning marking

    Correct Answer
    A. It will be marked with the MIL-STD-129 symbol or a caution marking
    Explanation
    Electrostatic sensitive devices are marked with the MIL-STD-129 symbol or a caution marking. This marking is used to indicate that the device is sensitive to electrostatic discharge and proper precautions need to be taken while handling it. The MIL-STD-129 symbol or caution marking serves as a visual reminder for individuals to use appropriate grounding techniques and anti-static measures to prevent damage to the device.

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  • 31. 

    When soldering flat perforated terminals, the conductor is connected to the terminal using a

    • 90 degree wrap

    • 180 degree wrap

    • 270 degree wrap

    • 360 degree wrap

    Correct Answer
    A. 180 degree wrap
    Explanation
    When soldering flat perforated terminals, the conductor is connected to the terminal using a 180 degree wrap. This means that the conductor is wrapped around the terminal in a half-circle shape, creating a secure and strong connection. This wrapping method ensures that the conductor is tightly secured to the terminal, preventing any loosening or disconnection that could cause electrical issues. Additionally, the 180 degree wrap allows for maximum surface contact between the conductor and the terminal, optimizing the flow of current and minimizing resistance.

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  • 32. 

    A wire is inserted into a solder cup until the

    • Wire touches the bottom

    • Wire clears the top of the cup

    • Insulation touches the cup

    • Wire protrudes from the weep hole

    Correct Answer
    A. Wire touches the bottom
    Explanation
    The correct answer is "wire touches the bottom". This means that the wire is inserted into the solder cup until it makes contact with the bottom of the cup. This ensures a secure connection and proper conductivity between the wire and the cup.

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  • 33. 

    A diode placed in a circuit in reverse bias is being used as

    • A spike protector

    • An amplifier

    • A regulator

    • A rectifier

    Correct Answer
    A. A spike protector
    Explanation
    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.

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  • 34. 

    A heat sink is used in soldering to

    • Prevent heat from damaging the component being soldered

    • Prevent heat from damaging other components in the circuit

    • Apply heat to the component being soldered

    • Apply heat to the other components in the circuit

    Correct Answer
    A. Prevent heat from damaging other components in the circuit
    Explanation
    A heat sink is a device used to dissipate heat and prevent overheating of electronic components. When soldering, excessive heat can be generated, which can potentially damage not only the component being soldered but also other nearby components in the circuit. By using a heat sink, the heat is efficiently transferred away from the soldered area, protecting both the soldered component and the surrounding components from heat damage.

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  • 35. 

    A transformer will change all of the following except

    • Power

    • Current

    • Voltage

    • Resistance

    Correct Answer
    A. Power
    Explanation
    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.

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  • 36. 

    Expanding or contracting the depletion region of a diode is called

    • Basing

    • Gating

    • Spiking

    • Biasing

    Correct Answer
    A. Biasing
    Explanation
    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.

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  • 37. 

    Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?

    • Zones

    • Schematic

    • Wiring Diagram

    • Reference designation index

    Correct Answer
    A. Reference designation index
    Explanation
    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.

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  • 38. 

    Which troubleshooting aid is designed to aid you in finding components on a diagram?

    • Zones

    • Schematic

    • Wiring Diagram

    • Reference designation index

    Correct Answer
    A. Zones
    Explanation
    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.

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  • 39. 

    A capacitor stores energy in the form of

    • Heat

    • Resistance

    • A magnetic field

    • An electrostatic field

    Correct Answer
    A. An electrostatic field
    Explanation
    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.

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  • 40. 

    A zener will conduct in reverse bias

    • For a second or two at a time

    • Until gate potantial has been reached

    • Once the avalanche point has been reached

    • Until the breakdown point has been reached

    Correct Answer
    A. Once the avalanche point has been reached
    Explanation
    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.

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  • 41. 

    In order for an SCR to be turned off

    • The forward breakover voltage must exceed the holding voltage

    • The current must drop below the holding current

    • The negative amp switch must activate

    • The negative volt switch must activate

    Correct Answer
    A. The current must drop below the holding current
    Explanation
    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.

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  • 42. 

    Total current in a series circuit is equal to the

    • Current through one component

    • Sum of the current through each componenet

    • Reciprocal of the current through one componenet

    • Reciprocal of the sum of the current through each component

    Correct Answer
    A. Current through one component
    Explanation
    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".

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  • 43. 

    Opposition of a capacitor to AC is called

    • Inductive reactance

    • Impedance

    • Capacitive reactance

    • Capacitance

    Correct Answer
    A. Capacitive reactance
    Explanation
    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.

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  • 44. 

    Source current in a parallel circuit will be divided according to branch

    • Voltage

    • Powers

    • Lengths

    • Resistances

    Correct Answer
    A. Resistances
    Explanation
    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.

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  • 45. 

    During which troubleshooting step do you try to determine which system could cause the malfunction?

    • Analysis

    • Verification

    • Recognition

    • Elimination and isolation

    Correct Answer
    A. Analysis
    Explanation
    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.

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  • 46. 

    Which troubleshooting step is done by knowing proper equipment operation?

    • Analysis

    • Recognition

    • Repair and check

    • Elimination and isolation

    Correct Answer
    A. Recognition
    Explanation
    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.

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  • 47. 

    What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?

    • .14 watts (w)

    • .14 kilowatts (kw)

    • 3.92 w.

    • 3.92 kw.

    Correct Answer
    A. 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.

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  • 48. 

    An inductor stores energy in the form of

    • Heat

    • Resistance

    • A magnetic field

    • An electrostatic field

    Correct Answer
    A. A magnetic field
    Explanation
    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.

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  • 49. 

    The amount of current required to gate an SCR is called

    • Forward breakover voltage

    • Holding current

    • Peak voltage

    • Gate current

    Correct Answer
    A. Forward breakover voltage
    Explanation
    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.

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  • Mar 21, 2023
    Quiz Edited by
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  • Aug 06, 2012
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    Cwonder

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