All 3 Tests (Electric, Plumbing, Hvac)
Questions And Answers With Verified
Solutions Latest Updated 2025
List the four main sources of electricity in the US
ANSWER:
1. Coal: 33%
2. Natural gas: 20%
3. Nuclear: 20%
4. Hydroelectric: 7%
List three renewable energy options available today for electrical generation
ANSWER: Solar, wind, hydroelectric
What is the principal greenhouse gas emitted from the main source of
electrical production?
ANSWER: Carbon emissions
In the journey from electrical generation to where the electricity enters the
house, what is the purpose of the transformer?
ANSWER: It raises or lowers the voltage when it's transferring electricity from
one circuit to another
What is the proper stripping distance when installing electrical conductor for
the sheathing and insulator?
ANSWER:
Sheathing: 1/4"
Insulator: 8"
Electrical code requirements for: height of light switch
ANSWER: 48"
Electrical code requirements for: max distance between outlets in a living
room
ANSWER: 12ft
Electrical code requirements for: maximum staple distance for wiring
ANSWER: 48"
, Electrical code requirements for: height of outlets on a wall
ANSWER: 20"
Electrical code requirements for: distance from box to first staple
ANSWER: 8"
Electrical code requirements for: circuits in the kitchen
ANSWER: There are 2 circuits rated 20 amps each required in the kitchen
What is the proper conductor gauge for the following circuits?
15 amp: #14
20 amp: #12
30 amp: #10
There are three voltage conductors that enter the house from the distribution
poles. What is the voltage of each conductor?
ANSWER: 120, 120, 240
GFCI
ANSWER: Ground fault circuit interrupter
Name four locations that a GFCI outlet would be required
ANSWER: Kitchen, bathroom, crawl spaces, garages
When attaching a hook formed on a conductor to a terminal on an outlet,
should the hook be installed in a clockwise or counterclockwise direction?
ANSWER: Clockwise
What do the following colors of the insulator indicate?
Red: Hot
Black: Hot
White: Neutral
Green: Ground
White with black tape: Hot
List four key strategies in terms of safety when doing electrical work
ANSWER: Label the service panel, rubber shoes, GFCI, always have the power
off when working on wires
Questions And Answers With Verified
Solutions Latest Updated 2025
List the four main sources of electricity in the US
ANSWER:
1. Coal: 33%
2. Natural gas: 20%
3. Nuclear: 20%
4. Hydroelectric: 7%
List three renewable energy options available today for electrical generation
ANSWER: Solar, wind, hydroelectric
What is the principal greenhouse gas emitted from the main source of
electrical production?
ANSWER: Carbon emissions
In the journey from electrical generation to where the electricity enters the
house, what is the purpose of the transformer?
ANSWER: It raises or lowers the voltage when it's transferring electricity from
one circuit to another
What is the proper stripping distance when installing electrical conductor for
the sheathing and insulator?
ANSWER:
Sheathing: 1/4"
Insulator: 8"
Electrical code requirements for: height of light switch
ANSWER: 48"
Electrical code requirements for: max distance between outlets in a living
room
ANSWER: 12ft
Electrical code requirements for: maximum staple distance for wiring
ANSWER: 48"
, Electrical code requirements for: height of outlets on a wall
ANSWER: 20"
Electrical code requirements for: distance from box to first staple
ANSWER: 8"
Electrical code requirements for: circuits in the kitchen
ANSWER: There are 2 circuits rated 20 amps each required in the kitchen
What is the proper conductor gauge for the following circuits?
15 amp: #14
20 amp: #12
30 amp: #10
There are three voltage conductors that enter the house from the distribution
poles. What is the voltage of each conductor?
ANSWER: 120, 120, 240
GFCI
ANSWER: Ground fault circuit interrupter
Name four locations that a GFCI outlet would be required
ANSWER: Kitchen, bathroom, crawl spaces, garages
When attaching a hook formed on a conductor to a terminal on an outlet,
should the hook be installed in a clockwise or counterclockwise direction?
ANSWER: Clockwise
What do the following colors of the insulator indicate?
Red: Hot
Black: Hot
White: Neutral
Green: Ground
White with black tape: Hot
List four key strategies in terms of safety when doing electrical work
ANSWER: Label the service panel, rubber shoes, GFCI, always have the power
off when working on wires
