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NYC ELECTRICIAN CIVIL SERVICE EXAM
(DCAS) 2026/2027 QUESTIONS WITH
VERIFIED ANSWERS & COMPLETE
RATIONALES
**1. A circuit has a total resistance of 24 ohms and an applied
voltage of 120 volts. What is the current flowing through this
circuit?**
A. 0.2 amperes
B. 2.4 amperes
C. 5.0 amperes
D. 2,880 amperes
**Correct answer:** C
**Rationale:** Using Ohm's Law, I = V / R = 120V / 24Ω = **5.0
amperes**.
---
**2. Three resistors valued at 10 ohms, 20 ohms, and 30 ohms
are connected in a series configuration. What is the total
resistance of the circuit?**
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A. 5.45 ohms
B. 10 ohms
C. 30 ohms
D. 60 ohms
**Correct answer:** D
**Rationale:** In a series circuit, total resistance is the sum of
individual resistances: 10 + 20 + 30 = **60 ohms**.
---
**3. What is the total resistance of two 12-ohm resistors
connected in a parallel configuration?**
A. 6 ohms
B. 12 ohms
C. 24 ohms
D. 144 ohms
**Correct answer:** A
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**Rationale:** For two equal resistors in parallel, total
resistance is half of one resistor: 12Ω / 2 = **6 ohms**. The
formula is 1/Rt = 1/R₁ + 1/R₂ = 1/12 + 1/12 = 2/12 = 1/6, so Rt =
6Ω.
---
**4. An industrial appliance consumes 2,400 watts of power
when connected to a 120-volt line. How much current does the
appliance draw?**
A. 0.05 amperes
B. 20 amperes
C. 50 amperes
D. 288 amperes
**Correct answer:** B
**Rationale:** Using the power formula P = V × I, rearrange to I
= P / V = 2,400W / 120V = **20 amperes**.
---
**5. If the voltage across a fixed resistor is doubled, what
happens to the current flowing through that resistor?**
NYC ELECTRICIAN CIVIL SERVICE EXAM
(DCAS) 2026/2027 QUESTIONS WITH
VERIFIED ANSWERS & COMPLETE
RATIONALES
**1. A circuit has a total resistance of 24 ohms and an applied
voltage of 120 volts. What is the current flowing through this
circuit?**
A. 0.2 amperes
B. 2.4 amperes
C. 5.0 amperes
D. 2,880 amperes
**Correct answer:** C
**Rationale:** Using Ohm's Law, I = V / R = 120V / 24Ω = **5.0
amperes**.
---
**2. Three resistors valued at 10 ohms, 20 ohms, and 30 ohms
are connected in a series configuration. What is the total
resistance of the circuit?**
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A. 5.45 ohms
B. 10 ohms
C. 30 ohms
D. 60 ohms
**Correct answer:** D
**Rationale:** In a series circuit, total resistance is the sum of
individual resistances: 10 + 20 + 30 = **60 ohms**.
---
**3. What is the total resistance of two 12-ohm resistors
connected in a parallel configuration?**
A. 6 ohms
B. 12 ohms
C. 24 ohms
D. 144 ohms
**Correct answer:** A
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**Rationale:** For two equal resistors in parallel, total
resistance is half of one resistor: 12Ω / 2 = **6 ohms**. The
formula is 1/Rt = 1/R₁ + 1/R₂ = 1/12 + 1/12 = 2/12 = 1/6, so Rt =
6Ω.
---
**4. An industrial appliance consumes 2,400 watts of power
when connected to a 120-volt line. How much current does the
appliance draw?**
A. 0.05 amperes
B. 20 amperes
C. 50 amperes
D. 288 amperes
**Correct answer:** B
**Rationale:** Using the power formula P = V × I, rearrange to I
= P / V = 2,400W / 120V = **20 amperes**.
---
**5. If the voltage across a fixed resistor is doubled, what
happens to the current flowing through that resistor?**
