NYC Electrician Exam
Practice Questions & Answers
NYC Health + Hospitals (H+H) Facilities Electrician Preparation
Verified Answers • Full Rationales • Latest
Format: Multiple Choice
Answer Key: Included immediately after each question
Rationale: Included for every question
Topics Covered: Electrical Theory, NEC/NYC Code, Grounding &
Bonding, Motors, Transformers, Wiring Methods,
Safety/LOTO, Emergency & Health Care Systems
This study guide is an original, independently prepared practice resource designed to help candidates review core
electrical theory, National Electrical Code (NEC) concepts, and facilities maintenance topics relevant to electrician
licensing and NYC Health + Hospitals facilities exams.
, Section 1: Electrical Theory & Ohm's Law
Q1. A circuit has a voltage source of 120V and a resistance of 24 ohms. What is the current
flowing through the circuit?
A) 2 A
B) 5 A
C) 8 A
D) 12 A
Correct Answer: B) 5 A
Rationale: Using Ohm's Law, I = V / R = 120V / 24 ohms = 5 A. Ohm's Law is the foundation for nearly all
basic circuit calculations on the exam, so committing the formula wheel (V=IR, I=V/R, R=V/I) to memory is
essential.
Q2. In a series circuit with three resistors of 10, 20, and 30 ohms, what is the total resistance?
A) 20 ohms
B) 60 ohms
C) 10 ohms
D) 6.7 ohms
Correct Answer: B) 60 ohms
Rationale: In a series circuit, total resistance is the simple sum of all resistances: 10 + 20 + 30 = 60 ohms.
Series resistances always add directly, unlike parallel circuits where total resistance is always less than the
smallest individual resistor.
Q3. Two resistors of 6 ohms each are connected in parallel. What is the total resistance?
A) 12 ohms
B) 6 ohms
C) 3 ohms
D) 1.5 ohms
Correct Answer: C) 3 ohms
Rationale: For two equal resistors in parallel, total resistance is R/2 = 6/2 = 3 ohms. More generally, 1/Rt =
1/R1 + 1/R2. Total resistance in a parallel circuit is always lower than the smallest branch resistance.
Q4. What is the power consumed by a 240V circuit drawing 15 amps?
A) 16 W
B) 225 W
C) 1,800 W
D) 3,600 W
Correct Answer: D) 3,600 W
Rationale: Power = V x I = 240 x 15 = 3,600 watts. Power calculations (P=VI, P=I^2R, P=V^2/R) are heavily
tested because they underlie load calculations, breaker sizing, and conductor selection.
, Q5. Which unit measures the rate at which electrical work is done?
A) Volt
B) Ohm
C) Watt
D) Coulomb
Correct Answer: C) Watt
Rationale: The watt is the unit of power -- the rate of energy transfer or work done per unit time. Volts
measure electrical potential difference, ohms measure resistance, and coulombs measure electric charge.
Q6. A single-phase motor is rated at 5 HP. Approximately how many watts is this?
A) 500 W
B) 746 W
C) 3,730 W
D) 5,000 W
Correct Answer: C) 3,730 W
Rationale: One horsepower equals approximately 746 watts, so 5 HP = 5 x 746 = 3,730 W. This conversion is
frequently used when sizing conductors and overcurrent protection for motor circuits.
Q7. What happens to total current in a parallel circuit as more branches (resistors) are added?
A) Total current decreases
B) Total current increases
C) Total current stays the same
D) Total current becomes zero
Correct Answer: B) Total current increases
Rationale: Adding parallel branches lowers total resistance while voltage stays constant, so by Ohm's Law
(I=V/R) total current drawn from the source increases as more paths are provided for current flow.
Q8. What is the power factor of a purely resistive AC circuit?
A) 0
B) 0.5
C) 0.85
D) 1.0
Correct Answer: D) 1.0
Rationale: In a purely resistive circuit, voltage and current are in phase, so the power factor (cosine of the
phase angle) equals 1.0. Inductive or capacitive reactance introduces a phase shift that reduces power factor
below 1.0.
Practice Questions & Answers
NYC Health + Hospitals (H+H) Facilities Electrician Preparation
Verified Answers • Full Rationales • Latest
Format: Multiple Choice
Answer Key: Included immediately after each question
Rationale: Included for every question
Topics Covered: Electrical Theory, NEC/NYC Code, Grounding &
Bonding, Motors, Transformers, Wiring Methods,
Safety/LOTO, Emergency & Health Care Systems
This study guide is an original, independently prepared practice resource designed to help candidates review core
electrical theory, National Electrical Code (NEC) concepts, and facilities maintenance topics relevant to electrician
licensing and NYC Health + Hospitals facilities exams.
, Section 1: Electrical Theory & Ohm's Law
Q1. A circuit has a voltage source of 120V and a resistance of 24 ohms. What is the current
flowing through the circuit?
A) 2 A
B) 5 A
C) 8 A
D) 12 A
Correct Answer: B) 5 A
Rationale: Using Ohm's Law, I = V / R = 120V / 24 ohms = 5 A. Ohm's Law is the foundation for nearly all
basic circuit calculations on the exam, so committing the formula wheel (V=IR, I=V/R, R=V/I) to memory is
essential.
Q2. In a series circuit with three resistors of 10, 20, and 30 ohms, what is the total resistance?
A) 20 ohms
B) 60 ohms
C) 10 ohms
D) 6.7 ohms
Correct Answer: B) 60 ohms
Rationale: In a series circuit, total resistance is the simple sum of all resistances: 10 + 20 + 30 = 60 ohms.
Series resistances always add directly, unlike parallel circuits where total resistance is always less than the
smallest individual resistor.
Q3. Two resistors of 6 ohms each are connected in parallel. What is the total resistance?
A) 12 ohms
B) 6 ohms
C) 3 ohms
D) 1.5 ohms
Correct Answer: C) 3 ohms
Rationale: For two equal resistors in parallel, total resistance is R/2 = 6/2 = 3 ohms. More generally, 1/Rt =
1/R1 + 1/R2. Total resistance in a parallel circuit is always lower than the smallest branch resistance.
Q4. What is the power consumed by a 240V circuit drawing 15 amps?
A) 16 W
B) 225 W
C) 1,800 W
D) 3,600 W
Correct Answer: D) 3,600 W
Rationale: Power = V x I = 240 x 15 = 3,600 watts. Power calculations (P=VI, P=I^2R, P=V^2/R) are heavily
tested because they underlie load calculations, breaker sizing, and conductor selection.
, Q5. Which unit measures the rate at which electrical work is done?
A) Volt
B) Ohm
C) Watt
D) Coulomb
Correct Answer: C) Watt
Rationale: The watt is the unit of power -- the rate of energy transfer or work done per unit time. Volts
measure electrical potential difference, ohms measure resistance, and coulombs measure electric charge.
Q6. A single-phase motor is rated at 5 HP. Approximately how many watts is this?
A) 500 W
B) 746 W
C) 3,730 W
D) 5,000 W
Correct Answer: C) 3,730 W
Rationale: One horsepower equals approximately 746 watts, so 5 HP = 5 x 746 = 3,730 W. This conversion is
frequently used when sizing conductors and overcurrent protection for motor circuits.
Q7. What happens to total current in a parallel circuit as more branches (resistors) are added?
A) Total current decreases
B) Total current increases
C) Total current stays the same
D) Total current becomes zero
Correct Answer: B) Total current increases
Rationale: Adding parallel branches lowers total resistance while voltage stays constant, so by Ohm's Law
(I=V/R) total current drawn from the source increases as more paths are provided for current flow.
Q8. What is the power factor of a purely resistive AC circuit?
A) 0
B) 0.5
C) 0.85
D) 1.0
Correct Answer: D) 1.0
Rationale: In a purely resistive circuit, voltage and current are in phase, so the power factor (cosine of the
phase angle) equals 1.0. Inductive or capacitive reactance introduces a phase shift that reduces power factor
below 1.0.
