NYC DCAS ELECTRICIAN NEWEST 2026 EXAM UP-
TO-DATE ACTUAL EXAM QUESTIONS AND 100%
ACCURATE SOLUTIONS | VERIFIED ANSWERS -
INSTANT PDF DOWNLOAD
SECTION 1: ELECTRICAL THEORY & CALCULATIONS
Q1. According to Ohm's Law, what is the correct formula for voltage?
A) V = I / R
B) V = I × R
C) V = R / I
D) V = P × I
Correct Answer: B
Rationale: Ohm's Law states voltage equals current multiplied by resistance (V = I
× R). Option A calculates current, option C inverts the relationship, and option D is
a power formula (P = V × I).
Q2. A 240V single-phase circuit supplies a 4,800W electric water heater. What is
the current draw?
A) 15A
B) 20A
C) 25A
D) 30A
,Correct Answer: B
Rationale: Using the power formula P = V × I, rearrange to I = P ÷ V = 4,800W ÷
240V = 20 amperes.
Q3. What is the SI unit of electrical resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: C
Rationale: The ohm (Ω) is the unit of electrical resistance. Volts measure voltage,
amperes measure current, and watts measure power.
Q4. A 3-phase, 208V system supplies a 10 kW balanced load. What is the
approximate line current?
A) 27.8A
B) 34.7A
C) 48.1A
D) 60.0A
Correct Answer: A
Rationale: Use the three-phase power formula: I = P / (√3 × V) = 10,000 / (1.732 ×
208) ≈ 27.8A.
,Q5. Three 15Ω resistors are connected in parallel. What is the total equivalent
resistance?
A) 5Ω
B) 15Ω
C) 45Ω
D) 60Ω
Correct Answer: A
Rationale: For identical resistors in parallel, total resistance = R/n = 15/3 = 5Ω.
Option C is the series total (15 + 15 + 15 = 45).
Q6. What term describes the ratio of true power (watts) to apparent power
(volt-amperes) in an AC circuit?
A) Power factor
B) Crest factor
C) Demand factor
D) Diversity factor
Correct Answer: A
Rationale: Power factor = real power (W) / apparent power (VA). It indicates how
efficiently current is converted into useful work.
Q7. In a purely inductive AC circuit, what is the phase relationship between
voltage and current?
A) Current leads voltage by 90°
B) Current lags voltage by 90°
, C) Current is in phase with voltage
D) Current leads voltage by 45°
Correct Answer: B
Rationale: In a pure inductor, the induced voltage opposes current change, causing
the voltage waveform to peak a quarter-cycle before the current—current lags
voltage by 90°.
Q8. A transformer operates at 95% efficiency. If output is 9.5 kW, what is the
input power?
A) 9.0 kW
B) 9.5 kW
C) 10.0 kW
D) 10.5 kW
Correct Answer: C
Rationale: Input = Output ÷ Efficiency = 9.5 kW ÷ 0.95 = 10.0 kW. The 0.5 kW
difference is lost as heat.
Q9. In an AC circuit, the product of voltage and current (VA) is called:
A) True power
B) Reactive power
C) Apparent power
D) Real power
Correct Answer: C
TO-DATE ACTUAL EXAM QUESTIONS AND 100%
ACCURATE SOLUTIONS | VERIFIED ANSWERS -
INSTANT PDF DOWNLOAD
SECTION 1: ELECTRICAL THEORY & CALCULATIONS
Q1. According to Ohm's Law, what is the correct formula for voltage?
A) V = I / R
B) V = I × R
C) V = R / I
D) V = P × I
Correct Answer: B
Rationale: Ohm's Law states voltage equals current multiplied by resistance (V = I
× R). Option A calculates current, option C inverts the relationship, and option D is
a power formula (P = V × I).
Q2. A 240V single-phase circuit supplies a 4,800W electric water heater. What is
the current draw?
A) 15A
B) 20A
C) 25A
D) 30A
,Correct Answer: B
Rationale: Using the power formula P = V × I, rearrange to I = P ÷ V = 4,800W ÷
240V = 20 amperes.
Q3. What is the SI unit of electrical resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: C
Rationale: The ohm (Ω) is the unit of electrical resistance. Volts measure voltage,
amperes measure current, and watts measure power.
Q4. A 3-phase, 208V system supplies a 10 kW balanced load. What is the
approximate line current?
A) 27.8A
B) 34.7A
C) 48.1A
D) 60.0A
Correct Answer: A
Rationale: Use the three-phase power formula: I = P / (√3 × V) = 10,000 / (1.732 ×
208) ≈ 27.8A.
,Q5. Three 15Ω resistors are connected in parallel. What is the total equivalent
resistance?
A) 5Ω
B) 15Ω
C) 45Ω
D) 60Ω
Correct Answer: A
Rationale: For identical resistors in parallel, total resistance = R/n = 15/3 = 5Ω.
Option C is the series total (15 + 15 + 15 = 45).
Q6. What term describes the ratio of true power (watts) to apparent power
(volt-amperes) in an AC circuit?
A) Power factor
B) Crest factor
C) Demand factor
D) Diversity factor
Correct Answer: A
Rationale: Power factor = real power (W) / apparent power (VA). It indicates how
efficiently current is converted into useful work.
Q7. In a purely inductive AC circuit, what is the phase relationship between
voltage and current?
A) Current leads voltage by 90°
B) Current lags voltage by 90°
, C) Current is in phase with voltage
D) Current leads voltage by 45°
Correct Answer: B
Rationale: In a pure inductor, the induced voltage opposes current change, causing
the voltage waveform to peak a quarter-cycle before the current—current lags
voltage by 90°.
Q8. A transformer operates at 95% efficiency. If output is 9.5 kW, what is the
input power?
A) 9.0 kW
B) 9.5 kW
C) 10.0 kW
D) 10.5 kW
Correct Answer: C
Rationale: Input = Output ÷ Efficiency = 9.5 kW ÷ 0.95 = 10.0 kW. The 0.5 kW
difference is lost as heat.
Q9. In an AC circuit, the product of voltage and current (VA) is called:
A) True power
B) Reactive power
C) Apparent power
D) Real power
Correct Answer: C
