NYC Electrical Engineer Exam Questions With
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. In a purely resistive AC circuit, the current and voltage are:
A) 90° out of phase
B) 45° out of phase
C) In phase
D) 180° out of phase
In a purely resistive circuit, voltage and current rise and fall together,
meaning they are in phase with each other.
2. The unit of inductance is:
A) Farad
B) Ohm
C) Henry
D) Tesla
Inductance measures the ability of a conductor to oppose changes in
current and is expressed in henrys (H).
3. Which of the following materials has the highest electrical
conductivity?
,A) Aluminum
B) Iron
C) Copper
D) Lead
Copper is widely used in electrical wiring due to its high electrical
conductivity and durability.
4. In a three-phase, four-wire system, the neutral carries:
A) Full line current
B) The unbalanced current
C) Zero current at all times
D) Twice the line current
The neutral wire in a three-phase system carries only the current
resulting from any imbalance among the phases.
5. Ohm’s Law states that:
A) Voltage equals current multiplied by power
B) Voltage equals current multiplied by resistance
C) Power equals current multiplied by resistance
D) Resistance equals voltage multiplied by current
Ohm’s Law is a fundamental relationship in circuits: V = I × R.
, 6. Which type of transformer connection is commonly used for
transmission lines?
A) Delta–Delta
B) Delta–Wye (Star)
C) Wye–Wye
D) Zigzag–Delta
Delta–Wye transformers are widely used in transmission because they
provide phase shifting, grounding, and efficiency advantages.
7. The primary purpose of a circuit breaker is to:
A) Step up voltage
B) Step down voltage
C) Interrupt current during overload or short circuit
D) Convert AC to DC
Circuit breakers protect circuits by interrupting excessive current,
preventing damage to equipment and fire hazards.
8. The maximum power transfer theorem states that maximum
power is delivered to the load when:
A) Load resistance is zero
B) Load resistance is infinite
, C) Load resistance equals source resistance
D) Load resistance equals twice the source resistance
Maximum power transfer occurs when the load resistance equals the
internal resistance of the source.
9. The primary advantage of using an RLC series circuit as a filter is:
A) To store energy indefinitely
B) To select or reject a specific frequency
C) To reduce power loss
D) To provide DC isolation
RLC circuits are frequency-selective; they can resonate at a particular
frequency to pass or block it.
10. Which law governs the relationship between voltage,
current, and magnetic flux in a coil?
A) Coulomb’s Law
B) Ohm’s Law
C) Faraday’s Law of Electromagnetic Induction
D) Ampere’s Law
Faraday’s Law states that a changing magnetic flux through a coil
induces an electromotive force (EMF).
11. In DC machines, commutators are used to:
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. In a purely resistive AC circuit, the current and voltage are:
A) 90° out of phase
B) 45° out of phase
C) In phase
D) 180° out of phase
In a purely resistive circuit, voltage and current rise and fall together,
meaning they are in phase with each other.
2. The unit of inductance is:
A) Farad
B) Ohm
C) Henry
D) Tesla
Inductance measures the ability of a conductor to oppose changes in
current and is expressed in henrys (H).
3. Which of the following materials has the highest electrical
conductivity?
,A) Aluminum
B) Iron
C) Copper
D) Lead
Copper is widely used in electrical wiring due to its high electrical
conductivity and durability.
4. In a three-phase, four-wire system, the neutral carries:
A) Full line current
B) The unbalanced current
C) Zero current at all times
D) Twice the line current
The neutral wire in a three-phase system carries only the current
resulting from any imbalance among the phases.
5. Ohm’s Law states that:
A) Voltage equals current multiplied by power
B) Voltage equals current multiplied by resistance
C) Power equals current multiplied by resistance
D) Resistance equals voltage multiplied by current
Ohm’s Law is a fundamental relationship in circuits: V = I × R.
, 6. Which type of transformer connection is commonly used for
transmission lines?
A) Delta–Delta
B) Delta–Wye (Star)
C) Wye–Wye
D) Zigzag–Delta
Delta–Wye transformers are widely used in transmission because they
provide phase shifting, grounding, and efficiency advantages.
7. The primary purpose of a circuit breaker is to:
A) Step up voltage
B) Step down voltage
C) Interrupt current during overload or short circuit
D) Convert AC to DC
Circuit breakers protect circuits by interrupting excessive current,
preventing damage to equipment and fire hazards.
8. The maximum power transfer theorem states that maximum
power is delivered to the load when:
A) Load resistance is zero
B) Load resistance is infinite
, C) Load resistance equals source resistance
D) Load resistance equals twice the source resistance
Maximum power transfer occurs when the load resistance equals the
internal resistance of the source.
9. The primary advantage of using an RLC series circuit as a filter is:
A) To store energy indefinitely
B) To select or reject a specific frequency
C) To reduce power loss
D) To provide DC isolation
RLC circuits are frequency-selective; they can resonate at a particular
frequency to pass or block it.
10. Which law governs the relationship between voltage,
current, and magnetic flux in a coil?
A) Coulomb’s Law
B) Ohm’s Law
C) Faraday’s Law of Electromagnetic Induction
D) Ampere’s Law
Faraday’s Law states that a changing magnetic flux through a coil
induces an electromotive force (EMF).
11. In DC machines, commutators are used to:
