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Electrical Systems MCQ

1. What does not constitute fast bilateral storage?

Solar panels

Hydroelectric dams

Pumped hydroelectric storage

Wind turbines

Answer

Correct Answer: Pumped hydroelectric storage

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2. What does EHV stand for?

Extra Heavy Voltage

Extra High Voltage

Equal High Voltage

Every High Voltage

Answer

Correct Answer: Extra High Voltage

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3. What is Extra High Voltage?

An electrical system or cable designed to operate at 66kv (nominal) or higher.

An electrical system or cable designed to operate at 345kv (nominal) or higher.

An electrical system or cable designed to operate at 44kv (nominal) or higher.

An electrical system or cable designed to operate at 132kv (nominal) or higher.

Answer

Correct Answer: An electrical system or cable designed to operate at 345kv (nominal) or higher.

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4. What is electromotive force?

The force that Holds the electrons in an atom

A measure of the amount of electrical energy available to push charge around a circuit.

Potential causing electricity to flow in a closed circuit.

The force that drives the electrons around a circuit

Answer

Correct Answer: Potential causing electricity to flow in a closed circuit.

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5. What is electricity?

The force that attracts opposite charges and repels like charges.

The flow of electrons through a conducting medium.

A physical phenomenon associated with the presence and motion of electric charge.

The study of electric and magnetic fields.

Answer

Correct Answer: The flow of electrons through a conducting medium.

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6. What is electric load shaping?

The scheduling and operation of generating resources to meet changing load levels

The study of how electricity is used

The study of how electricity is produced

A device that connects and disconnects an electric circuit

Answer

Correct Answer: The scheduling and operation of generating resources to meet changing load levels

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7. What is an electric generator?

A machine that transforms mechanical power into electric power.

A machine that uses electric power to generate light.

A machine that transforms electric power into mechanical power.

A machine that uses electric power to generate heat.

Answer

Correct Answer: A machine that transforms mechanical power into electric power.

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8. What is the most basic form of coupling in the grid?

No Coupling

Indirect Electric Interconnection

Direct Electric Interconnection

Data Chain Coupling

Answer

Correct Answer: Direct Electric Interconnection

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9. What is an electric cooperative?

A private, not-for-profit business governed by its consumers (known as consumer-members)

A for-profit business

A private business

A business governed by the government

Answer

Correct Answer: A private, not-for-profit business governed by its consumers (known as consumer-members)

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10. After what conditions will an electrical relay produce sudden changes in one or more electrical circuits?

The appearance of certain conditions in the controlling circuit.

When the device is turned off.

When there is a power outage.

When the device is turned on.

Answer

Correct Answer: The appearance of certain conditions in the controlling circuit.

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11. What is lighting efficiency?

A measure of how well a lighting system produces visible light.

A ratio of the light output of a lamp to the power it consumes.

A ratio of light emitted from a luminaire to the light produced by the bare lamp.

The number of lumens produced by a lighting system divided by the power consumed.

Answer

Correct Answer: A ratio of light emitted from a luminaire to the light produced by the bare lamp.

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12. What is the discharge current?

The amount of time it takes for a surge to dissipate.

The amount of energy needed to deliver a surge of electricity.

The surge current that is dissipated through a surge arrester.

The number of surges that can be delivered by an arrester.

Answer

Correct Answer: The surge current that is dissipated through a surge arrester.

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13. What is the surge current dissipated through a surge arrester called?

Discharge Current

Amperage

Dispersed Current

Arresting Current

Answer

Correct Answer: Discharge Current

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14. What is the opposite of direct current?

Conduction current

Static current

Alternating current

Direct current

Answer

Correct Answer: Alternating current

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15. Which of the following is not a type of current?

DC - Direct Current

AC - Alternating Current

CC - Continuous Current

AC/DC - Both

Answer

Correct Answer: AC - Alternating Current

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16. What is the Dielectric Test?

A test that is used to measure the electrical resistance of a material.

A test that is used to measure the speed of light in a vacuum.

A test that is used to determine the density of an object.

A test that is used to verify an insulation system.

Answer

Correct Answer: A test that is used to verify an insulation system.

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17. What is a dielectric?

A semiconductor

An insulator

A conductor

Any insulating medium which intervenes between two conductors and permits electrostatic attraction and repulsion to take place across it.

Answer

Correct Answer: Any insulating medium which intervenes between two conductors and permits electrostatic attraction and repulsion to take place across it.

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18. What is the optimization of the incremental cost of delivered power called?

Economic Dispatch

Peak Load Management

Capacity Planning

Load Management

Answer

Correct Answer: Economic Dispatch

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19. What is the name of the speed control mode that enables synchronous generators to be run in parallel?

Decreasing Speed Control

Droop Speed Control

Slip Speed Control

Constant Speed Control

Answer

Correct Answer: Droop Speed Control

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20. What is the purpose of a Distribution Transformer?

Transfers electrical energy from a primary to a secondary distribution circuit

Decreased the voltage in an electrical circuit

Isolates two circuits so that they do not affect each other

Increased the voltage in an electrical circuit

Answer

Correct Answer: Transfers electrical energy from a primary to a secondary distribution circuit

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21. A distribution transformer is a transformer for transferring electrical energy from a primary distribution circuit to a:

Generation circuit

Secondary distribution circuit

Primary distribution circuit

Consumer's service circuit

Answer

Correct Answer: Secondary distribution circuit

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22. What is the distribution system operator responsible for?

Monitoring the performance of the distribution network.

Providing reliable real-time distribution service, including the operation of Distributed Energy Resource.

Deciding on the location of new substations

Appointing local distribution area Managers

Answer

Correct Answer: Providing reliable real-time distribution service, including the operation of Distributed Energy Resource.

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23. What is the responsible for providing reliable real-time distribution service, including the operation of Distributed Energy Resource?

Independent Electricity Provider

Distribution System Operator

Local Distribution Company

Transmission System Operator

Answer

Correct Answer: Distribution System Operator

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24. The distribution system is generally considered to be anything from the distribution substation fence to what?

The transformer

The load center

The substation fence

The customer meter

Answer

Correct Answer: The customer meter

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25. What is Distributed Energy Resource (DER)?

A process of generating energy through the use of solar panels

A type of energy resource that is not renewable

A device that is used to store energy

Small-scale distributed generation and storage, usually connected to a distribution grid.

Answer

Correct Answer: Small-scale distributed generation and storage, usually connected to a distribution grid.

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26. What is Distributed Energy Resource?

Large-scale distributed generation and storage, usually connected to a distribution grid.

Small-scale distributed generation and storage, usually connected to a distribution grid.

Medium-scale distributed generation and storage, usually connected to a distribution grid.

Demand response

Answer

Correct Answer: Small-scale distributed generation and storage, usually connected to a distribution grid.

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27. What is the full meaning of "DR"?

Demand Response

Direct Response

Demand Restriction

Data Restriction

Answer

Correct Answer: Demand Response

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28. What is electric current?

The rate of flow of electrical energy through a vacuum

The rate of flow of water through a conductor

The rate of flow of electrical energy through a resistor

The rate of flow of electrical energy through a conductor or wire

Answer

Correct Answer: The rate of flow of electrical energy through a conductor or wire

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29. What is measured in amperes?

Brightness of light

Time

Electric current

Voltage

Answer

Correct Answer: Electric current

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30. What does the CSA registered mark show?

That a product has been independently tested and certified to meet recognized standards for quality.

That a product has been independently tested and certified to meet recognized standards for durability.

That a product has been independently tested and certified to meet recognized standards for aesthetics.

That a product has been independently tested and certified to meet recognized standards for safety or performance.

Answer

Correct Answer: That a product has been independently tested and certified to meet recognized standards for safety or performance.

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31. A connector is wired to the _____.

Ground

Source of power

Destination of power

Load

Answer

Correct Answer: Source of power

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32. Which of the following is NOT a conducting material?

Copper

Gold

Paper

Silver

Answer

Correct Answer: Paper

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33. Which of the following is the best conductor?

Silver

Copper

Gold

Iron

Answer

Correct Answer: Silver

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34. What does CE stand for?

Contract Electronics

Conformite Europeene

Cooperative Engineering

Continuous Evolution

Answer

Correct Answer: Conformite Europeene

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35. What does the CE marking on products indicate?

Compliance with some applicable directives

Absence of compliance with all applicable directives

Compliance with all applicable directives

Compliance with no applicable directives

Answer

Correct Answer: Compliance with all applicable directives

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36. What does a carbon monoxide alarm do?

Detect the presence of carbon monoxide in the air

Monitor the CO concentration in the surrounding environment over time

Produce carbon monoxide

Detect the presence of carbon dioxide in the air

Answer

Correct Answer: Detect the presence of carbon monoxide in the air

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37. What is a cable harness?

A method of connecting two pieces of equipment

A system used to connect two pieces of equipment

A device used to connect two pieces of equipment

A string of cables and/or wires which transmit informational signals or operating currents (energy)

Answer

Correct Answer: A string of cables and/or wires which transmit informational signals or operating currents (energy)

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38. What is the main purpose of a contingency reserve?

To provide energy for spinning reserves

To cover the unplanned trip of a large generator or transmission line

To provide energy for variable generation

To maintain system balance

Answer

Correct Answer: To cover the unplanned trip of a large generator or transmission line

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39. What is the main purpose of Contingency Analysis?

To evaluate the impacts of outages

To provide and prioritize the impacts of outages

To study the effects of outages

To show operators the effects of future outages

Answer

Correct Answer: To show operators the effects of future outages

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40. What is the definition of contingency?

A plan or course of action designed to deal with a particular situation

The state or quality of being dependent on something else

The degree to which something is possible

The unexpected failure or outage of a system component

Answer

Correct Answer: The unexpected failure or outage of a system component

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41. What is cogeneration?

The generation of electric energy and commercial or industrial quality heat or steam from a single facility.

The generation of electric energy and commercial or industrial quality heat or steam from multiple facilities.

The generation of commercial or industrial quality heat or steam from a single facility.

The generation of electric energy from a single facility.

Answer

Correct Answer: The generation of electric energy and commercial or industrial quality heat or steam from a single facility.

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42. What does an unbalanced circuit mean?

A circuit with two sides that are electrically unlike

A circuit that is not grounded

A circuit with no reference point

A circuit with two sides that are electrically the same

Answer

Correct Answer: A circuit with two sides that are electrically unlike

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43. What does a circuit do?

Stores electrical energy

Converts electrical energy into heat

Converts electrical energy into light

Allows an electric current to flow through it

Answer

Correct Answer: Allows an electric current to flow through it

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44. What is the main purpose of a circuit breaker?

To make and carry currents under normal conditions.

To make, carry, and break currents under abnormal conditions.

To make, carry, and break currents under normal and abnormal conditions.

To make and carry currents under specified conditions.

Answer

Correct Answer: To make, carry, and break currents under normal and abnormal conditions.

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45. What is a cable?

A flexible installation

A cord

A permanent installation

A set of wires, usually encased in an outer protective jacket.

Answer

Correct Answer: A set of wires, usually encased in an outer protective jacket.

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46. A "cord" would be a cable by this definition so far, but what is the main difference between a cord and a cable?

A cord is less flexible and often has a plug end for a portable appliance or lamp.

A cord is part of a permanent installation.

A cable is more flexible and often has a plug end for a portable appliance or lamp.

A cord is more flexible and often has a plug end for a portable appliance or lamp.

Answer

Correct Answer: A cord is more flexible and often has a plug end for a portable appliance or lamp.

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47. What does the word "Bundle" mean in the context of electrical engineering?

A device used to measure electrical current.

An electrical conductor made of multiple strands of metal wire.

A device used to measure electrical potential difference.

Multiple cables used to form one phase of an overhead circuit.

Answer

Correct Answer: Multiple cables used to form one phase of an overhead circuit.

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48. What does it mean to "buck" voltage?

To increase the current.

To lower the voltage.

To raise the voltage.

To improve the power factor.

Answer

Correct Answer: To lower the voltage.

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49. What does "Buck" mean?

To hit with great force

To move quickly

The act of lowering the voltage.

A male deer

Answer

Correct Answer: The act of lowering the voltage.

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50. What is the term for a reduction of voltage on the system?

White Screen of Death

Brownout

Blue Screen of Death

Blackout

Answer

Correct Answer: Brownout

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51. What does the word "Brownout" refer to?

A spike in energy consumption.

A surge of voltage on the system

A reduction of voltage on the system.

A power outage

Answer

Correct Answer: A reduction of voltage on the system.

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52. What is a Boost Charge?

A charge applied to a battery which is already near a state of full discharge, usually of short duration.

A charge applied to a battery which is already near a state of full charge, usually of short duration.

A charge applied to a battery which is already near a state of full discharge, usually of long duration.

A charge applied to a battery which is already near a state of full charge, usually of long duration.

Answer

Correct Answer: A charge applied to a battery which is already near a state of full charge, usually of short duration.

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53. What is the purpose of a boost charge?

To charge a battery that is completely discharged

To increase the voltage of a battery

To extend the life of a battery

To charge a battery that is already near full charge

Answer

Correct Answer: To charge a battery that is already near full charge

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54. What does a battery backup provide power for in case of an electrical outage?

Food refrigeration

Lighting

Electrical equipment

Air Conditioning

Answer

Correct Answer: Electrical equipment

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55. What does a bus do?

Manages computer memory

Transports people

Connects computer networks

Serves as a common connection for two or more circuits.

Answer

Correct Answer: Serves as a common connection for two or more circuits.

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56. What is the capacity, in equipment and conductors, installed on the bulk system in excess of that required to carry the peak load called?

Base Load

Bulk System Reserve

Maximum Continuous Rating

Power Factor

Answer

Correct Answer: Bulk System Reserve

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57. What is the Bulk Power System?

An interconnected system for the movement or transfer of electric energy in bulk on transmission levels.

A power plant that uses solar energy to generate electricity

A power plant that uses nuclear energy to generate electricity

A power plant that uses water to generate electricity

Answer

Correct Answer: An interconnected system for the movement or transfer of electric energy in bulk on transmission levels.

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58. What is B2G?

A system that uses solar panels to generate electricity

A method of construction using prefabricated components

A type of finish for interior walls

The interaction of buildings and grids, wherein services may be exchanged in either direction.

Answer

Correct Answer: The interaction of buildings and grids, wherein services may be exchanged in either direction.

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59. What is a branch?

Support struts installed on either side of a window or door to keep it from sagging

The woody part of a tree

A place where a river divides into smaller streams

One, two, or more circuits whose main power is connected through the same main switch or device.

Answer

Correct Answer: One, two, or more circuits whose main power is connected through the same main switch or device.

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60. What is the main power connected through in a Branch?

Main switch or device

Power plant

Load center

Main breaker

Answer

Correct Answer: Main switch or device

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61. What is the definition of Black Start?

A type of coal

The process of starting a car with a flat battery

Restoring power to a city

The process of restoring an electric power station

Answer

Correct Answer: The process of restoring an electric power station

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62. In a bilateral market, who agrees to the mutually agreeable terms?

Contractor and Buyer

Buyer and Seller

Financial Institution and Electric Utility

Seller and Neighboring Utility

Answer

Correct Answer: Buyer and Seller

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63. What is the minimum amount of electric power delivered or required over a given period at a constant rate?

Capacity Charge

Fixed Charge

Consumption Charge

Base Load

Answer

Correct Answer: Base Load

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64. What is the base load?

The maximum amount of electric power delivered or required over a given period at a constant rate.

The minimum amount of electric power delivered or required over a given period at a variable rate.

The minimum amount of electric power delivered or required over a given period at a constant rate.

The average amount of electric power delivered or required over a given period at a constant rate.

Answer

Correct Answer: The minimum amount of electric power delivered or required over a given period at a constant rate.

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65. Which of the following is not a base-load generating plant?

Nuclear Power Plant

Solar Power Plant

Coal Power Plant

Hydroelectric Power Plant

Answer

Correct Answer: Solar Power Plant

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66. Which type of generating plant is typically dispatched at constant or near-constant levels?

Must-run generating plants

Mid-merit generating plants

Base-load generating plants

Peak-load generating plants

Answer

Correct Answer: Base-load generating plants

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67. What does a Balancing Authority Area do?

Manages generation dispatch and balance, power interchange with neighboring Balancing Authority Areas, and load frequency control.

Manages generation dispatch and balance, power interchange with neighboring Balancing Authority Areas.

Manages generation dispatch and balance, power interchange with neighboring Balancing Authority Areas, and load frequency control within the region.

All of the above

Answer

Correct Answer: Manages generation dispatch and balance, power interchange with neighboring Balancing Authority Areas, and load frequency control.

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68. What is the responsible entity that integrates resource plans ahead of time called?

Balancing Authority

Resource Allocation Board

Power Management Board

Energy Regulatory Commission

Answer

Correct Answer: Balancing Authority

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69. What does a Balancing Authority do?

Maintains demand and resource balance within a Balancing Authority Area

Makes decisions on how to allocate resources

Is responsible for the Interconnection frequency

Manages construction and maintenance of balance sheets

Answer

Correct Answer: Maintains demand and resource balance within a Balancing Authority Area

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70. What is the fundamental balance required in a balancing area?

The total of all generation must exceed the total of all loads.

The total of all generation must equal the total of all loads.

There must be no imports or exports into or out of the balancing area.

The total of all generation must be less than the total of all loads.

Answer

Correct Answer: The total of all generation must equal the total of all loads.

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71. What is the ancillary service?

Services that assist the grid operator in maintaining system balance.

A service that helps to control the distribution of electricity

A system that regulates the flow of electricity

A type of electrical grid

Answer

Correct Answer: Services that assist the grid operator in maintaining system balance.

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72. Which of the following is not an Aggregator (Demand Response)?

Utility Distribution Company

Independent System Operator

Municipality

Scheduling Coordinator

Answer

Correct Answer: Independent System Operator

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73. What does AMI stand for?

Advanced Metering Infrastructure

Advanced Microcontroller Interface

Automated Meter Infrastructure

Amusing Metering Infrastructure

Answer

Correct Answer: Advanced Metering Infrastructure

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74. What is Advanced Flexible Distribution?

A distribution system where power can be derived from a variable mix of grid and local sources.

A system where power can only be derived from local sources.

A system where power can only be derived from the grid.

A system that is not very reliable.

Answer

Correct Answer: A distribution system where power can be derived from a variable mix of grid and local sources.

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75. What is the main component of an advanced flexible distribution system?

Demand response

Advanced control mechanisms

Distributed generation and storage

A variable mix of grid and local sources.

Answer

Correct Answer: A variable mix of grid and local sources.

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76. What is the definition of adaptability?

The ability to respond to change in weather

The ability to respond to change in demand and supply

The ability to respond to change in season

The ability to respond to change in climate

Answer

Correct Answer: The ability to respond to change in demand and supply

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77. What is a person approved or assigned by the employer to perform a specific type of duty or duties at the jobsite called?

A foreman.

A supervisor.

An inspector.

A designated person.

Answer

Correct Answer: A designated person.

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78. What does "Approved" mean?

Cancelled

Null and void

Sanctioned, endorsed, accredited, certified, or accepted as satisfactory by a duly constituted and nationally recognized authority or agency.

Disapproved

Answer

Correct Answer: Sanctioned, endorsed, accredited, certified, or accepted as satisfactory by a duly constituted and nationally recognized authority or agency.

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79. What does ANSI stand for?

American National Standards Institute

American National Science Institute

American National Security Institute

American National Strategy Institute

Answer

Correct Answer: American National Standards Institute

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80. What is an arc flash?

A visualization of the path of an electrical current

The flow of current through the air between phase conductors or phase and neutral or ground.

A device used to measure electrical current

A short circuit that results in a spark

Answer

Correct Answer: The flow of current through the air between phase conductors or phase and neutral or ground.

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81. What is an Arc?

A musical composition

A figure in architecture

A discharge of electricity through air or a gas.

A bright star

Answer

Correct Answer: A discharge of electricity through air or a gas.

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82. What is the purpose of an anchor?

To support and hold in place guy wires

To support and hold in place conductors when they are terminated at a pole or structure.

To support and hold in place masts on sailing ships

To prevent a structure from moving

Answer

Correct Answer: To support and hold in place conductors when they are terminated at a pole or structure.

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83. What does Amperage measure?

The flow rate of electricity

The diameter of the hose

The speed of the water

The pressure of the water

Answer

Correct Answer: The flow rate of electricity

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84. What is Amperage?

Measurement of the force of an electric current

Measurement of the flow rate of electricity

The push that electrons give to other electrons as they move along a conductor

The time it takes an electric current to flow through a conductor

Answer

Correct Answer: Measurement of the flow rate of electricity

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85. What does ampacity refer to?

Continuous current flow necessary to maintain a given voltage in a conductor.

Current in amperes that a conductor can carry continuously without exceeding its temperature rating.

The number of amps needed to heat a conductor in order to exceed its temperature rating.

Voltage in amperes that a conductor can carry continuously without exceeding its temperature rating.

Answer

Correct Answer: Current in amperes that a conductor can carry continuously without exceeding its temperature rating.

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86. What does AWG stand for?

Average Wire Gauge

American Wire Gage

Automotive Wire Gauge

Association of Wire Gauges

Answer

Correct Answer: American Wire Gage

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87. What is the name of the current that reverses direction at regular intervals?

Debit current

AC current

Direct current

Alternating current

Answer

Correct Answer: Alternating current

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88. What does "Al" represent?

Actinium

Aluminum

Neon

Argon

Answer

Correct Answer: Aluminum

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89. What is the chemical symbol for aluminum?

Answer

Correct Answer: Al

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90. What does AIS stand for?

Air Insulated Switchgear

Android Insulated Switchgear

Arc Insulated Switchgear

Arena Insulated Switchgear

Answer

Correct Answer: Air Insulated Switchgear

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91. What is the main purpose of an air blast breaker?

To blow-out the arc when the contacts open

To provide insulation to the circuit

To open the circuit when there is a overload

To close the circuit when there is a overload

Answer

Correct Answer: To blow-out the arc when the contacts open

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92. What blows out the arc in an air blast circuit breaker?

A blast of compressed air

A small explosive

The breaker doesn't use an arc

Electricity

Answer

Correct Answer: A blast of compressed air

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93. What does an adapter do?

Stores data

Allows different devices to connect

Generates heat

Converts AC to DC power

Answer

Correct Answer: Allows different devices to connect

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94. What is an adapter?

A cord or block style device with different ends that allows different devices to connect.

A device that regulates voltage and solders circuits.

A device used to transfer heat.

Answer

Correct Answer: A cord or block style device with different ends that allows different devices to connect.

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95. What is the definition for Apparent Power?

Reactive Power

The vector sum of Active Power and Reactive Power

The vector difference of Active Power and Reactive Power

Active Power

Answer

Correct Answer: The vector sum of Active Power and Reactive Power

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96. What is the original state of the active material in a battery during the charging process?

The material does not change state

The material produces electrical energy

The material reacts chemically

The material returns to its original state

Answer

Correct Answer: The material returns to its original state

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97. What is the definition of active material?

Material which reacts chemically to produce electrical energy when the cell discharges

The negative electrode of a lead-acid battery where the oxidation reaction occurs

The material used to construct the positive electrode of a lead-acid battery

A measure of a battery's energy storage capacity

Answer

Correct Answer: Material which reacts chemically to produce electrical energy when the cell discharges

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98. What is an Access Point?

A device used to connect two computer networks

A device used to connect a computer to a printer

A device used to connect a computer to the Internet

A wireless networked device usually connected to a wireless LAN used to access the wired LAN

Answer

Correct Answer: A wireless networked device usually connected to a wireless LAN used to access the wired LAN

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99. What does 'ACB' stand for?

Annual Crop Base

Acid-Catalyzed Bonding

Air Circuit Breaker

Area of Concentrated Breaking

Answer

Correct Answer: Air Circuit Breaker

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100. What does AC stand for?

Alternating Current

Amplitude Control

Automatic Color

Air Conditioning

Answer

Correct Answer: Alternating Current

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101. What does "Amp" stand for?

The measurement of the electrical resistance in a circuit at any given moment.

The measurement of the electrical voltage in a circuit at any given moment.

The measurement of the electrical power in a circuit at any given moment.

The measurement of the electrical current flowing in a circuit at any given moment.

Answer

Correct Answer: The measurement of the electrical current flowing in a circuit at any given moment.

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Applied Engineering MCQs | Topic-wise

MCQ on Advanced Electrical/Mechanical Systems	MCQ on Applied Mechanics
MCQ on Basic Applied Engineering	MCQ on Circuits
MCQ on Design & Analysis of Control Systems	MCQ on Electrical Systems
MCQ on Engineering Computation	MCQ on Engineering Economic Analysis
MCQ on Engineering Materials and Processes	MCQ on Foundations of Engineering
MCQ on General Chemistry	MCQ on Hydraulics and Pneumatics
MCQ on Manufacturing Processes	MCQ on Mechanical Measurements & Instrumentation
MCQ on Mechanical Systems	MCQ on Motors & Controls
MCQ on Principles of Microeconomics	MCQ on Reliability and Failure Analysis
MCQ on Senior Design Project	MCQ on Signal Analysis and Communications
General Applied Engineering MCQs