Electricity For HVAC: Check Your
Knowledge Ch 1-5 Questions And
Answers With Verified Solutions Latest
Updated 2025
A heating and air-conditioning service technician usually requires _____ to
troubleshoot heating and air-conditioning systems.
ANSWER: Voltage supplied to the equipment
A live electrical circuit is _____.
ANSWER: One that is being supplied with energy
_____ is used to operate most fan motors in gas furnaces.
ANSWER: 120 volts
240 volts is usually used to operate _____.
ANSWER: Compressors in residential condensing units
Electrical shock occurs when a person _____.
ANSWER: Becomes part of an electrical circuit
When a technician touches a _____ it is the most dangerous, and likely to
cause serious injury.
ANSWER: Live conductor with his right hand and touches a ground with his left
hand
The standard by which electrical installations are measured is the _____.
ANSWER: National Electrical Code (NEC)
A current flow of 0.1 ampere or less _____.
ANSWER: Could be fatal
A (n) _____ ladder is the type that should be used by a technician on the job.
ANSWER: Fiberglass
When dealing with a coworker receiving an electrical shock, _____.
ANSWER: Never touch the person receiving the shock
, The electrical energy supplied to an electrical circuit is called _____.
ANSWER: Electromotive force
The ground on a three-prong plug is the _____.
ANSWER: Center semicircular prong
Electrical tools or cords with a ground plug that is altered _____.
ANSWER: Should be taken out of service until replaced or repaired
An electrical device that will open an electrical circuit, preventing current
flow to the circuit if a small leak to ground is detected is called a _____.
ANSWER: GFCI
_____ is a procedure that is used to interrupt the power supply to an electrical
circuit or equipment.
ANSWER: Circuit lockout
The most common methods of circuit protection in structures are _____.
ANSWER: Fuses and circuit breakers
Most late-model power tools are double insulated and do not require a _____.
ANSWER: Ground
The National Electrical Code® and NEC® are registered trademarks of
_____.
ANSWER: The National Fire Protection Association
The ground wire is identified by the color _____ in almost all cases.
ANSWER: Green
The current flow is the amount of _____ flowing in a circuit and is measured
in amperes.
ANSWER: Electrons
Chapter 2
ANSWER:
All physical objects are composed of _____.
ANSWER: Matter
Knowledge Ch 1-5 Questions And
Answers With Verified Solutions Latest
Updated 2025
A heating and air-conditioning service technician usually requires _____ to
troubleshoot heating and air-conditioning systems.
ANSWER: Voltage supplied to the equipment
A live electrical circuit is _____.
ANSWER: One that is being supplied with energy
_____ is used to operate most fan motors in gas furnaces.
ANSWER: 120 volts
240 volts is usually used to operate _____.
ANSWER: Compressors in residential condensing units
Electrical shock occurs when a person _____.
ANSWER: Becomes part of an electrical circuit
When a technician touches a _____ it is the most dangerous, and likely to
cause serious injury.
ANSWER: Live conductor with his right hand and touches a ground with his left
hand
The standard by which electrical installations are measured is the _____.
ANSWER: National Electrical Code (NEC)
A current flow of 0.1 ampere or less _____.
ANSWER: Could be fatal
A (n) _____ ladder is the type that should be used by a technician on the job.
ANSWER: Fiberglass
When dealing with a coworker receiving an electrical shock, _____.
ANSWER: Never touch the person receiving the shock
, The electrical energy supplied to an electrical circuit is called _____.
ANSWER: Electromotive force
The ground on a three-prong plug is the _____.
ANSWER: Center semicircular prong
Electrical tools or cords with a ground plug that is altered _____.
ANSWER: Should be taken out of service until replaced or repaired
An electrical device that will open an electrical circuit, preventing current
flow to the circuit if a small leak to ground is detected is called a _____.
ANSWER: GFCI
_____ is a procedure that is used to interrupt the power supply to an electrical
circuit or equipment.
ANSWER: Circuit lockout
The most common methods of circuit protection in structures are _____.
ANSWER: Fuses and circuit breakers
Most late-model power tools are double insulated and do not require a _____.
ANSWER: Ground
The National Electrical Code® and NEC® are registered trademarks of
_____.
ANSWER: The National Fire Protection Association
The ground wire is identified by the color _____ in almost all cases.
ANSWER: Green
The current flow is the amount of _____ flowing in a circuit and is measured
in amperes.
ANSWER: Electrons
Chapter 2
ANSWER:
All physical objects are composed of _____.
ANSWER: Matter
