Arkansas Master Electrician Exam Verified
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already
Graded A+
1. What is the minimum ampacity required for branch-circuit
conductors supplying a 20-ampere rated general-use receptacle?
A. 15 A
B. 20 A
C. 25 A
D. 30 A
The branch-circuit conductors must match or exceed the rating of the
receptacle to prevent overheating.
2. According to the National Electrical Code (NEC), what is the
maximum spacing allowed between receptacles in a dwelling living
area?
A. 4 feet
B. 6 feet
C. 10 feet
D. 12 feet
Receptacles must be installed so that no point along the floor line of
a wall is more than 6 feet from a receptacle, resulting in a maximum
spacing of 12 feet between receptacles.
3. What type of conduit is required for outdoor direct burial wiring?
A. EMT
B. PVC Schedule 40 or 80
C. RMC
D. IMC
,PVC conduit is suitable for direct burial because it resists corrosion
and moisture intrusion.
4. Which device protects a circuit from overcurrent due to a short
circuit?
A. GFCI
B. AFCI
C. Circuit breaker
D. Switch
Circuit breakers and fuses are designed to interrupt current flow
when it exceeds the rated capacity, preventing damage and fire.
5. What is the maximum allowable voltage drop for a branch circuit
to a dwelling unit load?
A. 1%
B. 2%
C. 3%
D. 5%
The NEC recommends a maximum of 3% voltage drop for branch
circuits to ensure efficient operation of equipment.
6. What color insulation is typically used for grounded (neutral)
conductors?
A. Red
B. Blue
C. White or gray
D. Green
NEC requires grounded conductors to be white or gray for
identification.
, 7. Which of the following is required for all 125V, single-phase, 15-
and 20-ampere receptacles in kitchens?
A. GFCI protection
B. Arc-fault protection
C. Surge protection
D. EMT conduit
GFCI protection is required in areas where water is present to protect
against electric shock.
8. What is the maximum number of 12 AWG THHN conductors
allowed in a 3/4-inch EMT conduit?
A. 8
B. 9
C. 10
D. 12
Conduit fill tables in the NEC specify that 12 conductors of 12 AWG
THHN can safely fit in 3/4-inch EMT.
9. What is the required grounding electrode for a concrete-encased
electrode?
A. Copper rod only
B. Rebar at least 20 feet in concrete
C. Steel pipe
D. None required
Reinforcing bars in concrete can serve as a grounding electrode if at
least 20 feet of bare metal is in contact with the concrete.
10. What type of conductor is required for a 240V, 30A residential
dryer circuit?
A. 12 AWG copper
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already
Graded A+
1. What is the minimum ampacity required for branch-circuit
conductors supplying a 20-ampere rated general-use receptacle?
A. 15 A
B. 20 A
C. 25 A
D. 30 A
The branch-circuit conductors must match or exceed the rating of the
receptacle to prevent overheating.
2. According to the National Electrical Code (NEC), what is the
maximum spacing allowed between receptacles in a dwelling living
area?
A. 4 feet
B. 6 feet
C. 10 feet
D. 12 feet
Receptacles must be installed so that no point along the floor line of
a wall is more than 6 feet from a receptacle, resulting in a maximum
spacing of 12 feet between receptacles.
3. What type of conduit is required for outdoor direct burial wiring?
A. EMT
B. PVC Schedule 40 or 80
C. RMC
D. IMC
,PVC conduit is suitable for direct burial because it resists corrosion
and moisture intrusion.
4. Which device protects a circuit from overcurrent due to a short
circuit?
A. GFCI
B. AFCI
C. Circuit breaker
D. Switch
Circuit breakers and fuses are designed to interrupt current flow
when it exceeds the rated capacity, preventing damage and fire.
5. What is the maximum allowable voltage drop for a branch circuit
to a dwelling unit load?
A. 1%
B. 2%
C. 3%
D. 5%
The NEC recommends a maximum of 3% voltage drop for branch
circuits to ensure efficient operation of equipment.
6. What color insulation is typically used for grounded (neutral)
conductors?
A. Red
B. Blue
C. White or gray
D. Green
NEC requires grounded conductors to be white or gray for
identification.
, 7. Which of the following is required for all 125V, single-phase, 15-
and 20-ampere receptacles in kitchens?
A. GFCI protection
B. Arc-fault protection
C. Surge protection
D. EMT conduit
GFCI protection is required in areas where water is present to protect
against electric shock.
8. What is the maximum number of 12 AWG THHN conductors
allowed in a 3/4-inch EMT conduit?
A. 8
B. 9
C. 10
D. 12
Conduit fill tables in the NEC specify that 12 conductors of 12 AWG
THHN can safely fit in 3/4-inch EMT.
9. What is the required grounding electrode for a concrete-encased
electrode?
A. Copper rod only
B. Rebar at least 20 feet in concrete
C. Steel pipe
D. None required
Reinforcing bars in concrete can serve as a grounding electrode if at
least 20 feet of bare metal is in contact with the concrete.
10. What type of conductor is required for a 240V, 30A residential
dryer circuit?
A. 12 AWG copper
