NEW YORK CITY DCAS ELECTRICIAN (CIVIL SERVICE) EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
• Electrical Theory and Fundamentals
• National Electrical Code (NEC) Compliance
• Electrical Systems and Equipment
• Blueprint Reading and Schematic Interpretation
• Electrical Safety and OSHA Standards
• Troubleshooting and Diagnostic Procedures
• Electrical Installation and Maintenance Practices
• Municipal and NYC Electrical Regulations
• Professional Ethics and Standards of Conduct
Introduction
This comprehensive examination is designed to rigorously assess the knowledge, skills, and abilities required for the
position of Electrician within the New York City Department of Citywide Administrative Services (DCAS). The exam
evaluates proficiency in core electrical theory, practical application of the National Electrical Code, and the critical
decision-making skills necessary for the safe and efficient installation, maintenance, and repair of complex electrical
systems in a municipal setting. Candidates will be assessed through a variety of multiple-choice questions that combine
fundamental concepts with realistic, scenario-based challenges. The questions emphasize real-world application, safety
,protocols, regulatory compliance, and professional judgment to ensure candidates are prepared for the demands of the
role.
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SECTION ONE: QUESTIONS 1–50
1. What is the maximum number of conductors permitted in a 4-inch square by 2 1/8-inch deep metal box, using
12 AWG THHN conductors?
A. 10 conductors
B. 9 conductors
C. 12 conductors
D. 13 conductors
🟢 Correct Answer: A. 10 conductors
🔴 Explanation: Table 314.16(A) of the NEC specifies the maximum number of conductors for a 4-inch square by 2
1/8-inch deep box is 10 for 12 AWG conductors.
2. Which of the following is the most appropriate overcurrent protection device for a 15 kW, 240-volt, single-
phase electric range?
A. 40-ampere circuit breaker
B. 60-ampere circuit breaker
,C. 80-ampere circuit breaker
D. 100-ampere circuit breaker
🟢 Correct Answer: B. 60-ampere circuit breaker
🔴 Explanation: The load for a 15 kW range is calculated by dividing the wattage by voltage (15000/240 = 62.5A).
However, NEC 220.55 permits the use of a demand factor, which typically allows for a 60A branch circuit for this size
range.
3. When connecting a three-phase motor to a wye-delta starter, what is the primary purpose of the transition
period?
A. To reduce starting torque
B. To limit inrush current and reduce mechanical stress
C. To increase the motor's operating voltage
D. To change the motor's rotation direction
🟢 Correct Answer: B. To limit inrush current and reduce mechanical stress
🔴 Explanation: The wye-delta starter operates by initially connecting the motor in a wye configuration to reduce
voltage and inrush current, then transitioning to a delta connection for full voltage operation. This transition limits
starting current and reduces mechanical shock.
4. Which of the following is a permissible method for supporting a non-metallic sheathed cable (NM) in a
concealed location?
, A. Stapling the cable to the side of a stud, where the cable is protected from physical damage
B. Laying the cable loosely across ceiling joists in an attic
C. Securing the cable with metal staples driven flush with the cable surface
D. Using electrical tape to hold the cable to a plumbing pipe
🟢 Correct Answer: A. Stapling the cable to the side of a stud, where the cable is protected from physical damage
🔴 Explanation: NEC Article 334.30 requires NM cable to be secured at intervals not exceeding 4 1/2 feet and within
12 inches of each box. Stapling it to the side of a stud is a standard method, provided it's protected from physical
damage.
5. A transformer has a primary voltage of 480V and a secondary voltage of 120V. If the primary current is 5A,
what is the secondary current, assuming an ideal transformer?
A. 10A
B. 15A
C. 20A
D. 25A
🟢 Correct Answer: C. 20A
🔴 Explanation: For an ideal transformer, the power is constant (Vp * Ip = Vs * Is). Therefore, (480V * 5A) / 120V =
20A. The secondary current is 20 amps.
DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
• Electrical Theory and Fundamentals
• National Electrical Code (NEC) Compliance
• Electrical Systems and Equipment
• Blueprint Reading and Schematic Interpretation
• Electrical Safety and OSHA Standards
• Troubleshooting and Diagnostic Procedures
• Electrical Installation and Maintenance Practices
• Municipal and NYC Electrical Regulations
• Professional Ethics and Standards of Conduct
Introduction
This comprehensive examination is designed to rigorously assess the knowledge, skills, and abilities required for the
position of Electrician within the New York City Department of Citywide Administrative Services (DCAS). The exam
evaluates proficiency in core electrical theory, practical application of the National Electrical Code, and the critical
decision-making skills necessary for the safe and efficient installation, maintenance, and repair of complex electrical
systems in a municipal setting. Candidates will be assessed through a variety of multiple-choice questions that combine
fundamental concepts with realistic, scenario-based challenges. The questions emphasize real-world application, safety
,protocols, regulatory compliance, and professional judgment to ensure candidates are prepared for the demands of the
role.
════════════════════════════════════
SECTION ONE: QUESTIONS 1–50
1. What is the maximum number of conductors permitted in a 4-inch square by 2 1/8-inch deep metal box, using
12 AWG THHN conductors?
A. 10 conductors
B. 9 conductors
C. 12 conductors
D. 13 conductors
🟢 Correct Answer: A. 10 conductors
🔴 Explanation: Table 314.16(A) of the NEC specifies the maximum number of conductors for a 4-inch square by 2
1/8-inch deep box is 10 for 12 AWG conductors.
2. Which of the following is the most appropriate overcurrent protection device for a 15 kW, 240-volt, single-
phase electric range?
A. 40-ampere circuit breaker
B. 60-ampere circuit breaker
,C. 80-ampere circuit breaker
D. 100-ampere circuit breaker
🟢 Correct Answer: B. 60-ampere circuit breaker
🔴 Explanation: The load for a 15 kW range is calculated by dividing the wattage by voltage (15000/240 = 62.5A).
However, NEC 220.55 permits the use of a demand factor, which typically allows for a 60A branch circuit for this size
range.
3. When connecting a three-phase motor to a wye-delta starter, what is the primary purpose of the transition
period?
A. To reduce starting torque
B. To limit inrush current and reduce mechanical stress
C. To increase the motor's operating voltage
D. To change the motor's rotation direction
🟢 Correct Answer: B. To limit inrush current and reduce mechanical stress
🔴 Explanation: The wye-delta starter operates by initially connecting the motor in a wye configuration to reduce
voltage and inrush current, then transitioning to a delta connection for full voltage operation. This transition limits
starting current and reduces mechanical shock.
4. Which of the following is a permissible method for supporting a non-metallic sheathed cable (NM) in a
concealed location?
, A. Stapling the cable to the side of a stud, where the cable is protected from physical damage
B. Laying the cable loosely across ceiling joists in an attic
C. Securing the cable with metal staples driven flush with the cable surface
D. Using electrical tape to hold the cable to a plumbing pipe
🟢 Correct Answer: A. Stapling the cable to the side of a stud, where the cable is protected from physical damage
🔴 Explanation: NEC Article 334.30 requires NM cable to be secured at intervals not exceeding 4 1/2 feet and within
12 inches of each box. Stapling it to the side of a stud is a standard method, provided it's protected from physical
damage.
5. A transformer has a primary voltage of 480V and a secondary voltage of 120V. If the primary current is 5A,
what is the secondary current, assuming an ideal transformer?
A. 10A
B. 15A
C. 20A
D. 25A
🟢 Correct Answer: C. 20A
🔴 Explanation: For an ideal transformer, the power is constant (Vp * Ip = Vs * Is). Therefore, (480V * 5A) / 120V =
20A. The secondary current is 20 amps.
