NCCER EXAM QUESTIONS AND
ANSWERS
The transformer coils of the primary and secondary share no electrical connection but
the current flows through them due to
A. DC Induction
B. AC oscillation
C. DC Symetry
D. Mutual Induction - Correct Answers -D. Mutual Induction
A material with poor electrical properties is a good
A. Circuit
B. Insulator
C. Connector
D. Intensifier - Correct Answers -B. Insulator
In pure capacitance current leads voltage by
A. 15 degrees
B. 45 Degrees
C. 90 Degrees
D. 180 Degrees - Correct Answers -C. 90 Degrees*
Power is measured in
A. volts
B. Watts
C. Current
D. Load - Correct Answers -B. Watts
A Sectional Drawing shows
A. Cutaway view
B. Top of building - Correct Answers -A. Cutaway view*
Minimum number of overload sensing units in a 3 phase
A. 0
B. 1
C. 2
D. 3 - Correct Answers -D. 3
one per phase
The current flow of 4 resistors in parallel
A. 1
,B. 2
C. 3
D. 4 - Correct Answers -D. 4
A lighting outlet with a circle O means
A. LED light fixture
B. High intensity Fixture
C. Discharge Fixture
D. Incandescent Fixture - Correct Answers -D. Incandescent Fixture
What controls the speed of an induction motor
A. Volts
B. Current
C. Frequency
D. Load - Correct Answers -C. Frequency
C phase of a 3 phase from the front in relation to A,B, in a panel
A. Left
B. Right
C. Top
D. Bottom - Correct Answers -B. Right
Rubber equipment has ? and
A. Current rating
B. Expiration date
C. Last test date
D. Load Rating - Correct Answers -B. Expiration date
A 22-16 awg wire is what color
A. Black
B. Red
C. Blue
D. Green - Correct Answers -A. Black
13. Turn Ratio of a 3 phase 13.8 kv 115 to 1 what is the Secondary
A. 120 Volts
B. 208 Volts
C. 240 Volts
D. 480 Volts - Correct Answers -A. 120 Volts
13.8(1000)/115=120
Insulating tape is
A. Adhesive tape that keeps all conductors warm-
B. Nonconductive Adhesive tape
, C. Adhesive tape that sticks stuff together - Correct Answers -B. Nonconductive
Adhesive tape
15. Minimum distance between opposite walls
A. 4"
B. 8"
C. 32"
D. 40" - Correct Answers -NEED ANSWER
single 3/0-4", 2 1/0-5", 3 3/0-8"
The minimum depth of the box is 6 inches
The minimum distance between raceway entries is 18 inches
For a straight pull, the minimum length for a pull box with two 1" conduits and one 4"
conduit on one wall and two 1" conduits and one 4" conduit entering the opposite wall is
____
A. 24"
B. 26"
C. 32"
D. 34" - Correct Answers -C. 32"
8 times the largest raceway 8(4)=32
Opposite force
A. Reluctance
B. Resistance
C. Induction
D. Reactance - Correct Answers -C. Induction
Minimum spacing between ground rods
A. 4"
B. 6'
C. 8'
D. 10' - Correct Answers -B. 6'
The code requires you to space the rods at least 6' apart. When using an 8' or 10'
ground rod, the best results come from having them 16'-20' apart.
Tray width can't be the sum of the cable
A. Radius
B. Length
C. Diameter
D. Cross Section - Correct Answers -C. Diameter
The conductor system used to connect the system grounded conductor or the
equipment to a grounding elected or to a point on the grounding elected system is a
ANSWERS
The transformer coils of the primary and secondary share no electrical connection but
the current flows through them due to
A. DC Induction
B. AC oscillation
C. DC Symetry
D. Mutual Induction - Correct Answers -D. Mutual Induction
A material with poor electrical properties is a good
A. Circuit
B. Insulator
C. Connector
D. Intensifier - Correct Answers -B. Insulator
In pure capacitance current leads voltage by
A. 15 degrees
B. 45 Degrees
C. 90 Degrees
D. 180 Degrees - Correct Answers -C. 90 Degrees*
Power is measured in
A. volts
B. Watts
C. Current
D. Load - Correct Answers -B. Watts
A Sectional Drawing shows
A. Cutaway view
B. Top of building - Correct Answers -A. Cutaway view*
Minimum number of overload sensing units in a 3 phase
A. 0
B. 1
C. 2
D. 3 - Correct Answers -D. 3
one per phase
The current flow of 4 resistors in parallel
A. 1
,B. 2
C. 3
D. 4 - Correct Answers -D. 4
A lighting outlet with a circle O means
A. LED light fixture
B. High intensity Fixture
C. Discharge Fixture
D. Incandescent Fixture - Correct Answers -D. Incandescent Fixture
What controls the speed of an induction motor
A. Volts
B. Current
C. Frequency
D. Load - Correct Answers -C. Frequency
C phase of a 3 phase from the front in relation to A,B, in a panel
A. Left
B. Right
C. Top
D. Bottom - Correct Answers -B. Right
Rubber equipment has ? and
A. Current rating
B. Expiration date
C. Last test date
D. Load Rating - Correct Answers -B. Expiration date
A 22-16 awg wire is what color
A. Black
B. Red
C. Blue
D. Green - Correct Answers -A. Black
13. Turn Ratio of a 3 phase 13.8 kv 115 to 1 what is the Secondary
A. 120 Volts
B. 208 Volts
C. 240 Volts
D. 480 Volts - Correct Answers -A. 120 Volts
13.8(1000)/115=120
Insulating tape is
A. Adhesive tape that keeps all conductors warm-
B. Nonconductive Adhesive tape
, C. Adhesive tape that sticks stuff together - Correct Answers -B. Nonconductive
Adhesive tape
15. Minimum distance between opposite walls
A. 4"
B. 8"
C. 32"
D. 40" - Correct Answers -NEED ANSWER
single 3/0-4", 2 1/0-5", 3 3/0-8"
The minimum depth of the box is 6 inches
The minimum distance between raceway entries is 18 inches
For a straight pull, the minimum length for a pull box with two 1" conduits and one 4"
conduit on one wall and two 1" conduits and one 4" conduit entering the opposite wall is
____
A. 24"
B. 26"
C. 32"
D. 34" - Correct Answers -C. 32"
8 times the largest raceway 8(4)=32
Opposite force
A. Reluctance
B. Resistance
C. Induction
D. Reactance - Correct Answers -C. Induction
Minimum spacing between ground rods
A. 4"
B. 6'
C. 8'
D. 10' - Correct Answers -B. 6'
The code requires you to space the rods at least 6' apart. When using an 8' or 10'
ground rod, the best results come from having them 16'-20' apart.
Tray width can't be the sum of the cable
A. Radius
B. Length
C. Diameter
D. Cross Section - Correct Answers -C. Diameter
The conductor system used to connect the system grounded conductor or the
equipment to a grounding elected or to a point on the grounding elected system is a
