NCCER Electrical Exam Questions with
Verified Correct Answers
Verifying the presence or absence of voltage should be performed only by:
Qualified individuals
The NEC recommends maintaining voltage within a 3% drop. If a branch circuit
operates at 240 volts AC, what is the minimum circuit operating volt?
232
The volt amperes in an AC circuit is the same as
Apparent power
What is the voltage drop for a #8 (16.150 cmil) copper wire at 120v. 215 feet one way
and load of 39amps?
13.1
If a voltage source of a circuit provides 240 volts and there are 5 ohms of resistance,
how much current is in the circuit
48amps
What should be done to change rotation of a 3-phase motor?
swap any two T leads
What instrument is used to measure current?
Ammeter
Which plan indicates the location of structures and equipment on a property?
Detail drawing
,Generally, the most ideal conductor is made of:
Copper
What is the standard size system used in the US?
AWG
What is insulating tape?
Non-Conductive adhesive tape
Which of these is used as a guide to assist cables entering a conduit?
Sheave
Which of the following is not a reason why electrical systems must be grounded?
Limit the potential between ungrounded conductors
What type of conduit body is characterized by a threaded straight hub on each end?
C
A megger will be used to check an in-service cable. The electrician MUST be sure that
the circuit is:
De-energized and locked, tagged out, and tested
Rubber gloves MUST be electrically tested at MAXIMUM intervals of:
6 months
A dangerously high voltage is produced when someone opens the secondary circuit of a:
Current transformer
, Which choice best describes the two types of push button operators typically used in
motor controls
Open and closed
In the event of an emergency where the lockout/tagout device is left secured, who can
remove the lockout/tagout device?
Authorized supervisor
A drawing showing a point A to point B hookup of conductors is called a:
Wiring diagram
A NEMA type ___ enclosure is both watertight and corrosion-resistant.
4X
What's the MAIN characteristics of a confined space?
Limit access and egress
Which of the following BEST describes where the type and size of overcurrent
protection is found?
Panelboard schedule
A type "X" conduit body has how many conduit entries?
4
What test equipment can be used to test the condition of insulation in electrical
apparatus?
Megohmmeter
The opposing force to a flow of alternating current is called:
Verified Correct Answers
Verifying the presence or absence of voltage should be performed only by:
Qualified individuals
The NEC recommends maintaining voltage within a 3% drop. If a branch circuit
operates at 240 volts AC, what is the minimum circuit operating volt?
232
The volt amperes in an AC circuit is the same as
Apparent power
What is the voltage drop for a #8 (16.150 cmil) copper wire at 120v. 215 feet one way
and load of 39amps?
13.1
If a voltage source of a circuit provides 240 volts and there are 5 ohms of resistance,
how much current is in the circuit
48amps
What should be done to change rotation of a 3-phase motor?
swap any two T leads
What instrument is used to measure current?
Ammeter
Which plan indicates the location of structures and equipment on a property?
Detail drawing
,Generally, the most ideal conductor is made of:
Copper
What is the standard size system used in the US?
AWG
What is insulating tape?
Non-Conductive adhesive tape
Which of these is used as a guide to assist cables entering a conduit?
Sheave
Which of the following is not a reason why electrical systems must be grounded?
Limit the potential between ungrounded conductors
What type of conduit body is characterized by a threaded straight hub on each end?
C
A megger will be used to check an in-service cable. The electrician MUST be sure that
the circuit is:
De-energized and locked, tagged out, and tested
Rubber gloves MUST be electrically tested at MAXIMUM intervals of:
6 months
A dangerously high voltage is produced when someone opens the secondary circuit of a:
Current transformer
, Which choice best describes the two types of push button operators typically used in
motor controls
Open and closed
In the event of an emergency where the lockout/tagout device is left secured, who can
remove the lockout/tagout device?
Authorized supervisor
A drawing showing a point A to point B hookup of conductors is called a:
Wiring diagram
A NEMA type ___ enclosure is both watertight and corrosion-resistant.
4X
What's the MAIN characteristics of a confined space?
Limit access and egress
Which of the following BEST describes where the type and size of overcurrent
protection is found?
Panelboard schedule
A type "X" conduit body has how many conduit entries?
4
What test equipment can be used to test the condition of insulation in electrical
apparatus?
Megohmmeter
The opposing force to a flow of alternating current is called:
