"The Ultimate Electrical NCCER Test Prep Guide
with Verified Solutions" QUESTIONS & VERIFIED
SOLUTIONS 100% GUARANTEED PASS!!! 2025
Which Article of the NEC covers grounding? - Answer-article 250
Which of the following is a 90 degree, explosion proof fitting? - Answer-GUAL
What is a dropout plate? - Answer-Metal plate with a curved surface for cable to
follow as it passes from the tray
All of the following are common service voltages in the United States EXCEPT: -
Answer-372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - Answer-Opens a circuit to prevent operation of
an electrical device
How should power cable and signal cable be placed in the same cable tray? -
Answer-Place a divider between the signal cables and the power cable
What are the 2 MOST commonly used methods of terminating grounding? -
Answer-Exothermic (Cadwelding) and mechanical
Copper is the most widely used conductor because it. - Answer-Offers low
resistance and is easy to use
,The force that causes electrons to flow is most commonly called - Answer-Voltage
A dropout plate is best described as a. - Answer-Plate with a curved surface for
cable to follow as it passes from the tray
The 2 basic cable tray failures under load are _____ failures. - Answer-Side rail
and rung
A voltage of 1 volt applied across a resistance of 1 ohm produces a current of 1
amp. If the voltage is doubled and the resistance is halved, then the current -
Answer-Increases 4 times
The NEC requires that switch, receptacle, and fixture boxes be _with the finished
face of the wall surface when combustible material, such as ply- wood or
paneling, is being used - Answer-Mounted flush
The point of attachment of service drop conductors MUST provide MINIMUM
clearances as specified in what NEC cable? - Answer-310-16
The installation specifications of both surface metal raceways and surface
nonmetallic raceways can be found in. - Answer-NEC Articles 352
What is the correct combination for hooking up a 480-volt motor with 9 leads? -
Answer-L1&T1, L2&T2, L3&T3, 4&7, 5&8, 6&9
All of the following are standard fuse sizes EXCEPT - Answer-550 AMP
,To properly install a compression lug on a conductor REQUIRING multiple crimps,
the electrician will crimp? - Answer-Starting from the lug eye to the barrel
opening
When should a de-oxide compound be used? - Answer-During an aluminum to
copper connection
What should be used on every wire pull through conduit? - Answer-Wire lube
Given: the distance between a starter and a 3-phase motor is 73 ft. the started
MUST have a Sft tail and the motor a 3ft tail. How much multi-conductor wire is
REQUIRED for a pull from the starter to the motor? - Answer-81ft
What type of circuit breaker was developed to meet the needs of systems where
high potential fault-currents are present? - Answer-Current-limiting
Where are the overload heaters normally located in a motor circuit? - Answer-In
the motor starter between the "T" leads and the contactors
A heat trace cable is installed on a line that will be insulated. When will the cable
be "megged"? - Answer-Before and after the insulation is put on the line
Voltage has been stepped-down in a transformer. What happens to the current in
the secondary - Answer-It decreases
A VOM measures - Answer-Ohms, amps, and volts
, The standard unit for measuring the cross-sectional area of wire is the - Answer-
CIRCULAR MIL
??? are intended for the electrical protection of personnel. - Answer-GFCIS
If a circuit has 10 amps of current and 12 ohms of resistance, the applied voltage
is - Answer-120
A Type ?? conduit body has a threaded straight hub on each end and another
threaded hub perpendicular to these two. - Answer-T
The test leads of a megger should never be touched when it is in use because -
Answer-The generator voltage is present on the test leads and could result in
electrical shock
The purpose of an insulated bushing at raceway termination points is to - Answer-
Protect the conductors from being damaged
A voltmeter is connected in. - Answer-Parallel with the circuit
Solid bottom metal cable tray with solid metal covers may be used in - Answer-
Environments airways excluding ducts and plenums for environmental air
The indication provided by a voltage tester represents ____ - Answer-That there is
a potential difference between 2 points
with Verified Solutions" QUESTIONS & VERIFIED
SOLUTIONS 100% GUARANTEED PASS!!! 2025
Which Article of the NEC covers grounding? - Answer-article 250
Which of the following is a 90 degree, explosion proof fitting? - Answer-GUAL
What is a dropout plate? - Answer-Metal plate with a curved surface for cable to
follow as it passes from the tray
All of the following are common service voltages in the United States EXCEPT: -
Answer-372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - Answer-Opens a circuit to prevent operation of
an electrical device
How should power cable and signal cable be placed in the same cable tray? -
Answer-Place a divider between the signal cables and the power cable
What are the 2 MOST commonly used methods of terminating grounding? -
Answer-Exothermic (Cadwelding) and mechanical
Copper is the most widely used conductor because it. - Answer-Offers low
resistance and is easy to use
,The force that causes electrons to flow is most commonly called - Answer-Voltage
A dropout plate is best described as a. - Answer-Plate with a curved surface for
cable to follow as it passes from the tray
The 2 basic cable tray failures under load are _____ failures. - Answer-Side rail
and rung
A voltage of 1 volt applied across a resistance of 1 ohm produces a current of 1
amp. If the voltage is doubled and the resistance is halved, then the current -
Answer-Increases 4 times
The NEC requires that switch, receptacle, and fixture boxes be _with the finished
face of the wall surface when combustible material, such as ply- wood or
paneling, is being used - Answer-Mounted flush
The point of attachment of service drop conductors MUST provide MINIMUM
clearances as specified in what NEC cable? - Answer-310-16
The installation specifications of both surface metal raceways and surface
nonmetallic raceways can be found in. - Answer-NEC Articles 352
What is the correct combination for hooking up a 480-volt motor with 9 leads? -
Answer-L1&T1, L2&T2, L3&T3, 4&7, 5&8, 6&9
All of the following are standard fuse sizes EXCEPT - Answer-550 AMP
,To properly install a compression lug on a conductor REQUIRING multiple crimps,
the electrician will crimp? - Answer-Starting from the lug eye to the barrel
opening
When should a de-oxide compound be used? - Answer-During an aluminum to
copper connection
What should be used on every wire pull through conduit? - Answer-Wire lube
Given: the distance between a starter and a 3-phase motor is 73 ft. the started
MUST have a Sft tail and the motor a 3ft tail. How much multi-conductor wire is
REQUIRED for a pull from the starter to the motor? - Answer-81ft
What type of circuit breaker was developed to meet the needs of systems where
high potential fault-currents are present? - Answer-Current-limiting
Where are the overload heaters normally located in a motor circuit? - Answer-In
the motor starter between the "T" leads and the contactors
A heat trace cable is installed on a line that will be insulated. When will the cable
be "megged"? - Answer-Before and after the insulation is put on the line
Voltage has been stepped-down in a transformer. What happens to the current in
the secondary - Answer-It decreases
A VOM measures - Answer-Ohms, amps, and volts
, The standard unit for measuring the cross-sectional area of wire is the - Answer-
CIRCULAR MIL
??? are intended for the electrical protection of personnel. - Answer-GFCIS
If a circuit has 10 amps of current and 12 ohms of resistance, the applied voltage
is - Answer-120
A Type ?? conduit body has a threaded straight hub on each end and another
threaded hub perpendicular to these two. - Answer-T
The test leads of a megger should never be touched when it is in use because -
Answer-The generator voltage is present on the test leads and could result in
electrical shock
The purpose of an insulated bushing at raceway termination points is to - Answer-
Protect the conductors from being damaged
A voltmeter is connected in. - Answer-Parallel with the circuit
Solid bottom metal cable tray with solid metal covers may be used in - Answer-
Environments airways excluding ducts and plenums for environmental air
The indication provided by a voltage tester represents ____ - Answer-That there is
a potential difference between 2 points
