NYC DCAS ELECTRICIAN EXAM - (80
QUESTIONS) UP-TO-DATE ACTUAL EXAM
QUESTIONS AND 100% ACCURATE
SOLUTIONS | VERIFIED ANSWERS -
INSTANT PDF DOWNLOAD
1. A junction box contains four 12 AWG THHN copper current-carrying
conductors and one 12 AWG grounding conductor, with no device or internal
clamps. What is the minimum cubic inch capacity required per NEC 314.16?
A) 12.0 cu in
B) 15.0 cu in
C) 18.0 cu in
D) 20.25 cu in
Correct ,,,,answer,,,,: A
Rationale: NEC 314.16(B) requires each 12 AWG conductor to count as 2.25 cu
in. Four current-carrying conductors (4 × 2.25 = 9.0) plus one grounding conductor
(2.25) totals 5 allowances × 2.25 = 11.25 cu in. The minimum box volume must be
at least 11.25 cu in, and 12.0 cu in meets this requirement.
2. What is the maximum horizontal distance from a receptacle outlet
measured along the floor line in a dwelling unit kitchen countertop?
A) 2 ft
,B) 4 ft
C) 6 ft
D) 8 ft
Correct ,,,,answer,,,,: A
Rationale: NEC 210.52(C)(1) requires that no point along the countertop wall line
be more than 24 inches (2 ft) measured horizontally from a receptacle outlet. This
ensures convenient access for small appliances.
3. A conductor carrying electric current produces what type of field around
it?
A) Electrostatic field
B) Magnetic field
C) Optical field
D) Thermal field only
Correct ,,,,answer,,,,: B
Rationale: Whenever electric current flows through a conductor, it generates a
surrounding magnetic field. This principle is the foundation of electromagnetism,
used in motors, transformers, and solenoids.
4. What is the primary purpose of a grounding system in an electrical
installation?
A) Increase equipment efficiency
B) Reduce utility billing
,C) Improve conductor flexibility
D) Provide a safe path for fault current
Correct ,,,,answer,,,,: D
Rationale: Grounding systems are designed to safely direct fault current to earth
and facilitate overcurrent device operation during faults. This minimizes shock risk
and fire hazards. Grounding does not improve efficiency or reduce costs directly.
5. According to NEC, what is the maximum number of current-carrying
conductors allowed in a conduit before ampacity derating is required?
A) 2
B) 3
C) 4
D) 6
Correct ,,,,answer,,,,: C
Rationale: NEC 310.15(C)(1) requires ampacity adjustment (derating) when more
than three current-carrying conductors are present in a raceway or cable. With four
or more conductors, heat dissipation is reduced, requiring lower ampacity values.
6. What is the function of a circuit breaker?
A) Store energy
B) Interrupt current flow during faults
C) Increase voltage
D) Convert AC to DC
, Correct ,,,,answer,,,,: B
Rationale: The primary function of a circuit breaker is to automatically interrupt
current flow during overcurrent or fault conditions (short circuits or overloads) to
protect conductors and equipment. It can be manually reset after tripping.
7. Before beginning work inside an energized panelboard, what should an
electrician do FIRST according to OSHA safety practices?
A) Remove all branch circuit conductors
B) Test the panel for continuity
C) Disconnect the grounding conductor
D) Verify arc flash boundaries
Correct ,,,,answer,,,,: D
Rationale: Establishing and verifying arc flash boundaries is a critical first safety
step before working near energized equipment. This determines required PPE
(Personal Protective Equipment) and safe working distances per NFPA 70E.
8. Which conductor color is typically used for grounded neutral conductors in
branch circuits?
A) Green
B) White or gray
C) Red
D) Orange
Correct ,,,,answer,,,,: B
QUESTIONS) UP-TO-DATE ACTUAL EXAM
QUESTIONS AND 100% ACCURATE
SOLUTIONS | VERIFIED ANSWERS -
INSTANT PDF DOWNLOAD
1. A junction box contains four 12 AWG THHN copper current-carrying
conductors and one 12 AWG grounding conductor, with no device or internal
clamps. What is the minimum cubic inch capacity required per NEC 314.16?
A) 12.0 cu in
B) 15.0 cu in
C) 18.0 cu in
D) 20.25 cu in
Correct ,,,,answer,,,,: A
Rationale: NEC 314.16(B) requires each 12 AWG conductor to count as 2.25 cu
in. Four current-carrying conductors (4 × 2.25 = 9.0) plus one grounding conductor
(2.25) totals 5 allowances × 2.25 = 11.25 cu in. The minimum box volume must be
at least 11.25 cu in, and 12.0 cu in meets this requirement.
2. What is the maximum horizontal distance from a receptacle outlet
measured along the floor line in a dwelling unit kitchen countertop?
A) 2 ft
,B) 4 ft
C) 6 ft
D) 8 ft
Correct ,,,,answer,,,,: A
Rationale: NEC 210.52(C)(1) requires that no point along the countertop wall line
be more than 24 inches (2 ft) measured horizontally from a receptacle outlet. This
ensures convenient access for small appliances.
3. A conductor carrying electric current produces what type of field around
it?
A) Electrostatic field
B) Magnetic field
C) Optical field
D) Thermal field only
Correct ,,,,answer,,,,: B
Rationale: Whenever electric current flows through a conductor, it generates a
surrounding magnetic field. This principle is the foundation of electromagnetism,
used in motors, transformers, and solenoids.
4. What is the primary purpose of a grounding system in an electrical
installation?
A) Increase equipment efficiency
B) Reduce utility billing
,C) Improve conductor flexibility
D) Provide a safe path for fault current
Correct ,,,,answer,,,,: D
Rationale: Grounding systems are designed to safely direct fault current to earth
and facilitate overcurrent device operation during faults. This minimizes shock risk
and fire hazards. Grounding does not improve efficiency or reduce costs directly.
5. According to NEC, what is the maximum number of current-carrying
conductors allowed in a conduit before ampacity derating is required?
A) 2
B) 3
C) 4
D) 6
Correct ,,,,answer,,,,: C
Rationale: NEC 310.15(C)(1) requires ampacity adjustment (derating) when more
than three current-carrying conductors are present in a raceway or cable. With four
or more conductors, heat dissipation is reduced, requiring lower ampacity values.
6. What is the function of a circuit breaker?
A) Store energy
B) Interrupt current flow during faults
C) Increase voltage
D) Convert AC to DC
, Correct ,,,,answer,,,,: B
Rationale: The primary function of a circuit breaker is to automatically interrupt
current flow during overcurrent or fault conditions (short circuits or overloads) to
protect conductors and equipment. It can be manually reset after tripping.
7. Before beginning work inside an energized panelboard, what should an
electrician do FIRST according to OSHA safety practices?
A) Remove all branch circuit conductors
B) Test the panel for continuity
C) Disconnect the grounding conductor
D) Verify arc flash boundaries
Correct ,,,,answer,,,,: D
Rationale: Establishing and verifying arc flash boundaries is a critical first safety
step before working near energized equipment. This determines required PPE
(Personal Protective Equipment) and safe working distances per NFPA 70E.
8. Which conductor color is typically used for grounded neutral conductors in
branch circuits?
A) Green
B) White or gray
C) Red
D) Orange
Correct ,,,,answer,,,,: B
