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Electrical Systems for Buildings MCQ

What is the typical duration of a voltage swell?

A few hours to a day

A week or more

A few milliseconds to a few seconds

A few minutes to an hour

Answer

Correct Answer: A few milliseconds to a few seconds

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What is the duration of a Voltage Swell?

A few milliseconds to a few seconds.

A few minutes to an hour

Up to a day

More than a day

Answer

Correct Answer: A few milliseconds to a few seconds.

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What is the cause of voltage drop?

A loose wire

Current flowing through a circuit.

A break in the circuit

A faulty outlet

Answer

Correct Answer: Current flowing through a circuit.

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What is voltage?

The force or "push" driving electrical energy through a conductor or wire

The width of the conductor or wire

The amount of electrical energy that can flow through a conductor or wire

The force or "pull" driving electrical energy through a conductor or wire

Answer

Correct Answer: The force or "push" driving electrical energy through a conductor or wire

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What does USE stand for?

United States of America

Union of Soviet Socialist Republics

Universal Serial Bus

Underground Service Entrance

Answer

Correct Answer: Underground Service Entrance

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What is the meaning of USE?

Union of Soviet Socialists

Underground Service Entrance conductor or cable.

Unicycles Society Event

Upper Society Elite

Answer

Correct Answer: Underground Service Entrance conductor or cable.

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What does UPS stand for?

Uninterrupted Power Supply

Uninterruptable Power Supply

Universal Parcel Service

United Parcel Service

Answer

Correct Answer: Uninterruptable Power Supply

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What is a single relay that can be used alone or in combinations with others called?

Multiple Electric Relay

Single Electric Relay

Unit Electrical Relay

Combined Electrical Relay

Answer

Correct Answer: Unit Electrical Relay

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What is the definition of Ultra High Voltage (UFV)?

Transmission systems in the ac voltage equals or exceeds 1,000,000 volts.

Transmission systems in the ac voltage exceeds 800,000 volts.

Transmission systems in the ac voltage equals or exceeds 800,000 volts.

Transmission systems in the dc voltage exceeds 800,000 volts.

Answer

Correct Answer: Transmission systems in the ac voltage exceeds 800,000 volts.

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What is the act of preparing the connection or transition of an insulating cable called?

Termination

Transitioning

Connecting

Completion

Answer

Correct Answer: Termination

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What is the purpose of a terminal?

To fasten a device

To provide a point of connection to external circuits

To end a wire

To act as a conductor

Answer

Correct Answer: To provide a point of connection to external circuits

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What does " Temperatue Rating" mean?

The maximum temperature at which insulation will maintain its integrity.

The point at which insulation will begin to degrade

The minimum temperature at which insulation will be effective

Temperature at which the material will begin to soften

Answer

Correct Answer: The maximum temperature at which insulation will maintain its integrity.

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What does stripping refer to?

The removal of the insulation or jacket from a conductor/wire.

Giving a wire a negative electrical charge.

The process of adding insulation to a conductor/wire.

The act of making a wire thinner.

Answer

Correct Answer: The removal of the insulation or jacket from a conductor/wire.

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What does the designation "stripping" refer to?

Removal of the insulation or jacket from a conductor/wire

The process of adding insulation or a jacket to a conductor/wire

The process of removing all electrical charge from a conductor/wire

The process of coating a conductor/wire in a material that is not electrically conductive

Answer

Correct Answer: Removal of the insulation or jacket from a conductor/wire

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What is stringing?

The process of making a rope or string tight

The act of pulling a wire through a conduit

The process of joining two pieces of metal

The act of installing overhead electrical wire or conductor.

Answer

Correct Answer: The act of installing overhead electrical wire or conductor.

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What is the act of installing overhead electrical wire or conductor called?

Hanging

Stringing

Mounting

Connecting

Answer

Correct Answer: Stringing

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What is the designation to separate insulated parallel wires?

Stripping

Slitting

Splicing

Seaming

Answer

Correct Answer: Slitting

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What is slitting?

A unit of measurement

A method of printing

A type of weld

The designation to separate insulated parallel wires.

Answer

Correct Answer: The designation to separate insulated parallel wires.

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What is a short circuit?

A load that occurs when an ungrounded conductor does not come into contact with another conductor or grounded object.

A load that occurs when an ungrounded conductor comes into contact with another conductor or grounded object.

A load that occurs when a conductor comes into contact with an object.

A load that occurs when a grounded conductor comes into contact with another conductor or grounded object.

Answer

Correct Answer: A load that occurs when an ungrounded conductor comes into contact with another conductor or grounded object.

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What does SEC stand for?

Secondary Electrical Cable

Service Entrance Cable

Special Event Coordinator

Service Entrance Capacity

Answer

Correct Answer: Service Entrance Cable

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What is the designation ROJ stand for?

Russian Orthodox Jew

Red Oval Jello

Raise Our Juniors

Remove Outer Jacket

Answer

Correct Answer: Remove Outer Jacket

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What are relays used for on power systems?

To detect excessive currents and send signals to protective devices

To increase the voltage of the power

To distribute the power evenly

To provide backup power in the event of a power outage

Answer

Correct Answer: To detect excessive currents and send signals to protective devices

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Which of the following is NOT a use for a Regulator?

To increase the voltage of a circuit.

To decrease the voltage of a circuit.

To control the voltage of a circuit by raising and lowering it.

To keep the voltage of a circuit constant.

Answer

Correct Answer: To control the voltage of a circuit by raising and lowering it.

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A receptacle is which of the following?

A flange mounted wiring device that is not recessed.

A male flange mounted wiring device with the conducting elements recessed behind the mating surface.

A device that is not wired to the source of power.

A female flange mounted wiring device with the conducting elements recessed behind the mating surface.

Answer

Correct Answer: A female flange mounted wiring device with the conducting elements recessed behind the mating surface.

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A receptacle is a:

Flange mounted wiring device

Female flange mounted wiring device

Wiring device

Male flange mounted wiring device

Answer

Correct Answer: Female flange mounted wiring device

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What is pulling?

The act of removing one or more cables.

The act of replacing one or more cables.

The act of organizing one or more cables.

The act of installing one or more cables.

Answer

Correct Answer: The act of installing one or more cables.

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Pull tension is measured in _____.

Pounds or kilograms

Miles

Feet

Yards

Answer

Correct Answer: Pounds or kilograms

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What is a pull?

To tug or draw

A fishing term

A type of fabric

The installation of one or more cables.

Answer

Correct Answer: The installation of one or more cables.

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What is the definition of power?

The rate of doing work, measured in watts

The amount of work done over a given time, measured in joules

Rate at which energy is released or consumed, expressed in watts.

Energy divided by time, measured in joules per second

Answer

Correct Answer: Rate at which energy is released or consumed, expressed in watts.

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What is the unit of power?

Seconds

Joules

Volts

Watts

Answer

Correct Answer: Watts

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What does the term "Polarized" mean in relation to plugs and connectors?

A plug and connector that is not able to connect properly.

A plug and connector that is not properly grounded.

A plug and connector that is not properly insulated.

A plug and connector formed in a way that only allows proper connection.

Answer

Correct Answer: A plug and connector formed in a way that only allows proper connection.

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Which of the following is true about plugs?

They are always live until they are plugged into a power source

They are always dead until they are plugged into a power source

Plugs are devices that are plugged into a power source in order to make the exposed pins live.

Plugs are male cord mounted wiring devices with the conducting pins recessed and not exposed.

Answer

Correct Answer: They are always dead until they are plugged into a power source

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Why should plugs never be wired to make the exposed pins live while unplugged?

It is unnecessary

It is dangerous

It is inefficient

Plugged devices will not work

Answer

Correct Answer: It is dangerous

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What does PCC stand for?

Polycrystalline Silicon Carbide

Point of Common Coupling

Probability of Correct Classification

PrimaryCare Clinics

Answer

Correct Answer: Point of Common Coupling

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What is the specified maximum magnitude of the input quantity that can be applied for a specified period of time without causing damage?

Overload

Magnitude

Input quantity

Specified period of time

Answer

Correct Answer: Overload

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What causes an Outage?

Voltage sags

Planned maintenance

Internal component failures

External factors such as trees

Answer

Correct Answer: External factors such as trees

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What is a fuse used on overhead electrical distribution systems held in place by?

One spring

No device

Two springs

A magnet

Answer

Correct Answer: Two springs

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What does OD stand for?

Open Day

Outer Diameter

Online Data

Original Design

Answer

Correct Answer: Outer Diameter

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What is Off Peak Power?

Power supplied during designated periods of low power system demand.

Power supplied during designated periods of high power system demand.

Peak power

A type of energy

Answer

Correct Answer: Power supplied during designated periods of low power system demand.

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What is a Notching Relay?

A relay which switches in response to a specific number of applied impulses.

A device that measures frequency

A solid state relay

A time delay relay

Answer

Correct Answer: A relay which switches in response to a specific number of applied impulses.

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What does "Non-Load break" refer to?

The process of deliberately disconnecting a part of an electrical system

A group of rubber insulating products that can be separated under load

A group of rubber insulating products that cannot be separated under load

A device used to connect or disconnect electric circuits

Answer

Correct Answer: A group of rubber insulating products that cannot be separated under load

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What does the term "Non-Load break" refer to?

A device used to measure or indicate the current in an electrical circuit.

A device used to connect or disconnect circuit breakers

A device used to protect against overloading in an electrical circuit.

A group of rubber insulating products that cannot be separated under load.

Answer

Correct Answer: A group of rubber insulating products that cannot be separated under load.

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What does nominal voltage refer to?

The dc voltage required to produce a given dc current in a circuit.

A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class.

The rms value of an ac voltage.

The highest voltage that can be applied to a circuit without causing damage.

Answer

Correct Answer: A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class.

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What does NACC stand for?

North American Cartographic Council

National Association of Colour Corporations

North American Color Code

National Association of Credit Counselors

Answer

Correct Answer: North American Color Code

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What is the meaning of the word "Midget"?

A very small person

Referring to an inlet or outlet with a shallow depth

Of limited or below average height

A person with above average intelligence

Answer

Correct Answer: Referring to an inlet or outlet with a shallow depth

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What is the maximum voltage for aMedium Voltage electrical system?

50 kV

48 kV

60 kV

38 kV

Answer

Correct Answer: 38 kV

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What does MCC stand for?

Military Command Center

Main Control Center

Mission Control Center

Motor Control Center

Answer

Correct Answer: Motor Control Center

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What does a limit switch do?

A limit switch is used to measure temperature or pressure.

A limit switch is used to create electrical circuits.

A limit switch is used to protect against overloads.

A limit switch is used to open or close electrical circuits when certain limits are reached.

Answer

Correct Answer: A limit switch is used to open or close electrical circuits when certain limits are reached.

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What does LED stand for?

Light Enhancing Diode

Light Emitting Diode

Long Exposure Daguerreotype

Light Emitting Dioxide

Answer

Correct Answer: Light Emitting Diode

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What is the other name for lay direction?

The twist of conductors in a machine.

The twist of conductors in a cable.

The direction in which the wires of a conductor are stretched.

The direction in which the wires of a conductor are crossed.

Answer

Correct Answer: The twist of conductors in a cable.

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What is a lateral circuit?

A power line that is not the main line

A power line that is not needed

A tap-off line to take primary distribution from the main power line to a nearby load center.

A type of electrical circuit

Answer

Correct Answer: A tap-off line to take primary distribution from the main power line to a nearby load center.

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What is the definition of "Lag?"

The resistance offered by a material to the flow of current.

The condition where the current is delayed in time with respect to the voltage in an ac circuit.

The condition where the voltage is delayed in time with respect to the current in an ac circuit.

A unit of measure of an AC power supply.

Answer

Correct Answer: The condition where the current is delayed in time with respect to the voltage in an ac circuit.

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What does kVA stand for?

1,000 Very Angry People

Apparent Power expressed in Thousand Volt-Amps

1,000 Volts of Alternative Power

1,000Volt Amps

Answer

Correct Answer: Apparent Power expressed in Thousand Volt-Amps

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What is a kilowatt?

A unit used to measure the rate of energy transfer

1000 joules per second

Kilojoules per second

1000 watts of real power. Expressed at kW.

Answer

Correct Answer: 1000 watts of real power. Expressed at kW.

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What is a jumper?

A person who jumps

An electrical connection between two points.

A type of shoe

A type of clothing

Answer

Correct Answer: An electrical connection between two points.

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What is a jacket?

Outer material layer of a cord.

An article of clothing worn by men or women in cold weather

A coat

A sleeveless garment extending from the neck to the waist

Answer

Correct Answer: Outer material layer of a cord.

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What is a cord?

A measure of length equal to 22 yards

A unit of electrical resistance equal to one millionth of an ohm

A type of strong thread made of several strands of twine twisted together

A tool used for cutting wood

Answer

Correct Answer: A type of strong thread made of several strands of twine twisted together

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Induced Voltage is caused by a:

Resistor

Nearby electric field

Decreasing current

Changing magnetic flux

Answer

Correct Answer: Nearby electric field

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What is the Impulse Test used for?

To determine the speed of an object

To find the acceleration of an object

To confirm that the insulation level is sufficient to withstand overvoltages

To calculate the density of an object

Answer

Correct Answer: To confirm that the insulation level is sufficient to withstand overvoltages

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What is an impulse?

The rate at which work is done.

A measure of how difficult it is to stop an object.

A sudden burst of energy or emotion.

A current surge.

Answer

Correct Answer: A current surge.

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What does IEC stand for?

Intergovernmental Economic Cooperation

International Electrotechnical Commission

International Energy Commission

International Electrical Council

Answer

Correct Answer: International Electrotechnical Commission

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What does the ICC standardize?

International law

Currency Conversion

Weather patterns

Wire jacket colors

Answer

Correct Answer: Wire jacket colors

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What does the acronym "ICC" stand for?

International Confederation of Cinematographers

International Color Code

International Committee on Climate Change

International Criminal Court

Answer

Correct Answer: International Color Code

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What is the Independent System Operator (ISO) responsible for?

Carrying out construction projects

Planning the electrical grid

Maintaining system balance, reliability, and electricity market operation.

Deciding electricity rates

Answer

Correct Answer: Maintaining system balance, reliability, and electricity market operation.

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What is ISO responsible for?

Planning the electrical grid

Maintaining system balance, reliability, and electricity market operation

Generating electricity

Distributing electricity

Answer

Correct Answer: Maintaining system balance, reliability, and electricity market operation

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What is one horsepower equivalent to in terms of power usage?

746 watts

1000 watts

800 watts

550 watts

Answer

Correct Answer: 746 watts

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One horsepower is equivalent to _____ watts.

666

1260

746

1000

Answer

Correct Answer: 746

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What does HV system stand for?

Highly Volatile System

Heavy Voltage System

Hardly Visible System

High Voltage System

Answer

Correct Answer: High Voltage System

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What is the meaning of "roo-mean-square ac voltage"?

The minimum voltage of an electric power system.

The average voltage of an electric power system.

The maximum voltage of an electric power system.

The voltage of an electric power system at a specific time.

Answer

Correct Answer: The maximum voltage of an electric power system.

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What equates to one cycle per second?

Four hertz

Two hertz

Three hertz

One hertz

Answer

Correct Answer: One hertz

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How many hertz are in one cycle per second?

Answer

Correct Answer: 1

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What is the Harmonized Code?

A mathematical formula

A type of musical composition

An international coding system for specifying the attributes of cord voltages, jackets, diameters, etc.

A computer programming language

Answer

Correct Answer: An international coding system for specifying the attributes of cord voltages, jackets, diameters, etc.

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What is a Local grid?

A power station that produces electricity to be fed into a grid

A system of electrical generation, distribution, and utilization

A Microgrid or Nanogrid

A device that measures the amount of power in an electrical circuit

Answer

Correct Answer: A Microgrid or Nanogrid

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What is an electric power system that utilizes information exchange and control technologies called?

Grid

Power System

Electric System

Electrical System

Answer

Correct Answer: Grid

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What is Smart/Intelligent Grid?

A system that uses advanced metering infrastructure to improve customer service.

A system that uses automated demand response to reduce peak demand.

A system that uses renewable energy sources to power electric vehicles.

A system that uses sensors, actuators, and distributed computing to control the flow of electricity.

Answer

Correct Answer: A system that uses sensors, actuators, and distributed computing to control the flow of electricity.

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What is the historical definition of a grid?

A structure consisting of electric infrastructure, control structure, regulatory structure, industry structure, digital superstructure, convergent networks, and coordination frameworks

A network for transmitting and distributing electrical power

A system for generating and distributing electricity to customers

Answer

Correct Answer: A network for transmitting and distributing electrical power

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What are the services that make up a grid service?

There are no services that make up a grid service.

Unconventional Ancillary Services, and other emerging services that facilitate particular grid qualities.

Conventional Ancillary Services, and other emerging services that facilitate particular grid qualities.

Conventional Ancillary Services, and other emerging services that do not facilitate particular grid qualities.

Answer

Correct Answer: Conventional Ancillary Services, and other emerging services that facilitate particular grid qualities.

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What causes an electric grid to fail due to collapsing voltage?

Grid Instability

Geomagnetic storms

Solar flares

EMP weapon

Answer

Correct Answer: Grid Instability

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What is a generator trip?

A generator trip occurs when there is a loss of power

A generator trip occurs when the power system is overloaded

A generator trip occurs when there is a sudden increase in demand for power

A generator trip occurs when a generator fails and causes a contingency condition on the power system.

Answer

Correct Answer: A generator trip occurs when a generator fails and causes a contingency condition on the power system.

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What is Generation Dispatch?

The process of varying the output from generation on a moment-to-moment basis to meet changing demand requirements.

The process of varying the output from generation on a moment-to-moment basis to meet changing supply requirements.

The process of varying the output from generation on an hourly basis to meet changing supply requirements.

The process of creating an energy storage system to capture and store energy for later use.

Answer

Correct Answer: The process of varying the output from generation on a moment-to-moment basis to meet changing supply requirements.

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What is the process of varying the output from generation on a moment-to-moment basis to meet changing supply requirements called?

Load Dispatch

Generation Dispatch

Unit Commitment

Power Dispatch

Answer

Correct Answer: Generation Dispatch

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What is the term used to describe the shift from centralized generation to a mix of centralized and distributed generation?

Load Division

Generation Bifurcation

Generation Division

Load Bifurcation

Answer

Correct Answer: Generation Bifurcation

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What is the trend of the conventional power grid generation model?

To shift from distributed generation connected to distribution, to a mix of that and centralized generation connected to transmission

To shift from centralized generation connected to distribution, to a mix of that and distributed generation connected to transmission

To shift from distributed generation connected to transmission, to a mix of that and centralized generation connected to distribution

To shift from centralized generation connected to transmission, to a mix of that and distributed generation connected to distribution

Answer

Correct Answer: To shift from centralized generation connected to transmission, to a mix of that and distributed generation connected to distribution

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Electric energy is generated by which of the following?

Solar thermal

Natural gas, coal, oil

Photovoltaic, wind- farm, hydroelectric

Nuclear fission, nuclear fusion

Answer

Correct Answer: Photovoltaic, wind- farm, hydroelectric

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What is an undesired current path between ground and an electrical potential called?

Ground Fault

Short Circuit

Line Surge

Open Circuit

Answer

Correct Answer: Short Circuit

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What is a ground fault?

A current path between two conductors

A current path between ground and an electrical potential.

An undesired current path between ground and an electrical potential.

A current path between two circuit breakers

Answer

Correct Answer: An undesired current path between ground and an electrical potential.

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What is the UK term for "ground"?

Outlet

Earth

Overload

Ground

Answer

Correct Answer: Earth

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What is the main purpose of a GFCI?

To increase the voltage of a circuit

To improve the quality of the current in a circuit

To prevent electrical shocks

To provide extra protection for outdoor circuits

Answer

Correct Answer: To prevent electrical shocks

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What is the main purpose of a fuse?

To power equipment

To measure current

To control current

To protect equipment from over current conditions and damage

Answer

Correct Answer: To protect equipment from over current conditions and damage

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What is a frequency transducer?

A device that converts electromagnetic waves into electrical signals

A transducer used for the measurement of the frequency of an A.C. electrical quantity

A device that converts electrical signals into mechanical energy

A device that converts mechanical energy into electrical signals

Answer

Correct Answer: A transducer used for the measurement of the frequency of an A.C. electrical quantity

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What does FPI stand for?

Fault Passage Indicator

Foreign Policy Initiative

False Positive Indicator

Film Production Industry

Answer

Correct Answer: Fault Passage Indicator

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What is a Feeder?

A machine that helps to wash clothes

A device that helps to clean water

A three phase distribution line circuit used as a source to other three phase and single phase circuits.

A machine that helps to chop vegetables

Answer

Correct Answer: A three phase distribution line circuit used as a source to other three phase and single phase circuits.

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What is ferrite used for?

To conduct electricity

To cool equipment

To prevent high frequency electrical noise from entering or exiting the equipment.

To insulate against heat

Answer

Correct Answer: To prevent high frequency electrical noise from entering or exiting the equipment.

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What is the "circuit-opening fusible part" of a fuse?

The part of the fuse that is not opened by the passage of the overcurrent through it.

The part of the fuse that is not heated by the passage of the overcurrent through it.

The part of the fuse that is not severed by the passage of the overcurrent through it.

The part of the fuse that is heated and severed by the passage of the overcurrent through it.

Answer

Correct Answer: The part of the fuse that is heated and severed by the passage of the overcurrent through it.

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What is the Forward Capacity Auction?

An auction where resources compete to obtain a commitment to supply capacity in exchange for a market-priced capacity payment.

A way to reduce carbon emissions

A method of electrical power generation

A type of merger

Answer

Correct Answer: An auction where resources compete to obtain a commitment to supply capacity in exchange for a market-priced capacity payment.

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What does the forward capacity market ensure?

That a power system will have necessary resources to meet the future demand for electricity.

That a power system will have sufficient resources to meet the future demand for electricity.

That a power system will have adequate resources to meet the future demand for electricity.

That a power system will have sufficient resources to meet the current demand for electricity.

Answer

Correct Answer: That a power system will have sufficient resources to meet the future demand for electricity.

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What is the purpose of a Forward Capacity Market?

To ensure that a power system will have sufficient resources to meet the future demand for oil.

To ensure that a power system will have sufficient resources to meet the current demand for electricity.

To ensure that a power system will have sufficient resources to meet the future demand for electricity.

To ensure that a power system will have sufficient resources to meet the future demand for gas.

Answer

Correct Answer: To ensure that a power system will have sufficient resources to meet the future demand for electricity.

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What does a flexible distribution system rely on for power?

A mix of grid and local sources

Only local sources

Only grid power

Demand response

Answer

Correct Answer: A mix of grid and local sources

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What is the ability of the generation fleet to change its output (ramp) rapidly called?

Rigidity

Inelasticity

Flexibility

Elasticity

Answer

Correct Answer: Flexibility

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What is the voltage of a primary feeder?

Primary voltage

Secondary voltage

Medium voltage

Low voltage

Answer

Correct Answer: Medium voltage

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What is a primary feeder?

A feeder operating at alternating voltage supplying a distribution circuit.

A feeder operating at tertiary voltage supplying a distribution circuit.

A feeder operating at secondary voltage supplying a distribution circuit.

A feeder operating at primary voltage supplying a distribution circuit.

Answer

Correct Answer: A feeder operating at primary voltage supplying a distribution circuit.

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What is the purpose of a feeder?

To provide nourishment

To generate electricity

To conduct electricity between the service equipment and the final overcurrent device

To conduct water

Answer

Correct Answer: To conduct electricity between the service equipment and the final overcurrent device

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What does FERC stand for?

Foreign Exchange Regulation Commission

Federal Energy Regulatory Commission

Federal Energy Regulatory Council

Federal Emergency Relief Committee

Answer

Correct Answer: Federal Energy Regulatory Commission

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What is the Federal Energy Regulatory Commission?

A commission that regulates natural gas projects

An independent agency that regulates the interstate transmission of natural gas, oil, and electricity.

A commission that regulates interstate transportation

A commission that regulates energy projects

Answer

Correct Answer: An independent agency that regulates the interstate transmission of natural gas, oil, and electricity.

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Communications and HVAC

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