NYC DCAS ELECTRICIAN EXAM QUESTIONS WITH
CORRRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A |INSTANT DOWNLOAD
PDF
1. Ohm’s Law describes the relationship between voltage,
current, and resistance as:
A. I = V × R B. V = I + R C. V = I × R D. R = V/I²
Rationale: Voltage equals current times resistance.
2. Resistance in a circuit primarily:
A. Stores charge B. Opposes current flow C. Increases
voltage D. Produces magnetism
Rationale: Resistance opposes current.
3. Conductors are materials that:
A. Block current B. Allow easy flow of electrons C. Store
charge D. Increase resistance
Rationale: Conductors permit electron movement.
4. The unit of electrical resistance is:
A. Ampere B. Ohm C. Volt D. Watt
Rationale: Resistance is measured in ohms (Ω).
5. In a series circuit, the number of paths for current is:
A. Many B. One C. None D. Infinite
Rationale: Series circuits have a single path.
,6. In a parallel circuit, total resistance is:
A. Higher than any branch B. Lower than the smallest
branch C. Equal to sum of branches D. Infinite
Rationale: Parallel branches reduce total resistance.
7. Voltage in a series circuit:
A. Is the same across each resistor B. Varies based on
resistance C. Is zero D. Doubles each time
Rationale: Voltage splits proportionally in series.
8. Current in parallel branches:
A. Is zero B. Varies by branch resistance C. Is equal in all
branches D. Halves each time
Rationale: Each branch gets its own current.
9. An insulator is a material that:
A. Generates current B. Resists current flow C. Stores
energy D. Has no electrons
Rationale: Insulators resist electron flow.
10. Alternating current (AC) changes direction:
A. Slowly B. Many times per second C. Never D. Only
in DC systems
Rationale: AC alternates direction repeatedly.
11. Direct current (DC) flows:
A. In one direction B. In circles C. Backwards sometimes
D. Randomly
Rationale: DC flows steadily one way.
, 12. Standard household AC frequency in the US is:
A. 25 Hz B. 60 Hz C. 50 Hz D. 120 Hz
Rationale: US uses 60 cycles per second.
13. Electrical power (P) is given by P = V × I. The unit of
power is:
A. Volt B. Watt C. Ampere D. Ohm
Rationale: Power is measured in watts.
14. A device that interrupts current flow when
overloaded is a:
A. Transformer B. Resistor C. Circuit breaker D.
Capacitor
Rationale: Circuit breakers protect circuits.
15. A fuse protects a circuit by:
A. Increasing resistance B. Melting when current is too
high C. Reducing voltage D. Storing charge
Rationale: Fuses break the circuit on overload.
16. Capacitance is measured in:
A. Ohms B. Farads C. Watts D. Volts
Rationale: Capacitance unit is farad.
17. Inductors store energy in:
A. Electric fields B. Magnetic fields C. Heat D. Charge
Rationale: Magnetic fields store energy in inductors.
18. A transformer is used to:
A. Store charge B. Change voltage C. Increase current
CORRRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A |INSTANT DOWNLOAD
1. Ohm’s Law describes the relationship between voltage,
current, and resistance as:
A. I = V × R B. V = I + R C. V = I × R D. R = V/I²
Rationale: Voltage equals current times resistance.
2. Resistance in a circuit primarily:
A. Stores charge B. Opposes current flow C. Increases
voltage D. Produces magnetism
Rationale: Resistance opposes current.
3. Conductors are materials that:
A. Block current B. Allow easy flow of electrons C. Store
charge D. Increase resistance
Rationale: Conductors permit electron movement.
4. The unit of electrical resistance is:
A. Ampere B. Ohm C. Volt D. Watt
Rationale: Resistance is measured in ohms (Ω).
5. In a series circuit, the number of paths for current is:
A. Many B. One C. None D. Infinite
Rationale: Series circuits have a single path.
,6. In a parallel circuit, total resistance is:
A. Higher than any branch B. Lower than the smallest
branch C. Equal to sum of branches D. Infinite
Rationale: Parallel branches reduce total resistance.
7. Voltage in a series circuit:
A. Is the same across each resistor B. Varies based on
resistance C. Is zero D. Doubles each time
Rationale: Voltage splits proportionally in series.
8. Current in parallel branches:
A. Is zero B. Varies by branch resistance C. Is equal in all
branches D. Halves each time
Rationale: Each branch gets its own current.
9. An insulator is a material that:
A. Generates current B. Resists current flow C. Stores
energy D. Has no electrons
Rationale: Insulators resist electron flow.
10. Alternating current (AC) changes direction:
A. Slowly B. Many times per second C. Never D. Only
in DC systems
Rationale: AC alternates direction repeatedly.
11. Direct current (DC) flows:
A. In one direction B. In circles C. Backwards sometimes
D. Randomly
Rationale: DC flows steadily one way.
, 12. Standard household AC frequency in the US is:
A. 25 Hz B. 60 Hz C. 50 Hz D. 120 Hz
Rationale: US uses 60 cycles per second.
13. Electrical power (P) is given by P = V × I. The unit of
power is:
A. Volt B. Watt C. Ampere D. Ohm
Rationale: Power is measured in watts.
14. A device that interrupts current flow when
overloaded is a:
A. Transformer B. Resistor C. Circuit breaker D.
Capacitor
Rationale: Circuit breakers protect circuits.
15. A fuse protects a circuit by:
A. Increasing resistance B. Melting when current is too
high C. Reducing voltage D. Storing charge
Rationale: Fuses break the circuit on overload.
16. Capacitance is measured in:
A. Ohms B. Farads C. Watts D. Volts
Rationale: Capacitance unit is farad.
17. Inductors store energy in:
A. Electric fields B. Magnetic fields C. Heat D. Charge
Rationale: Magnetic fields store energy in inductors.
18. A transformer is used to:
A. Store charge B. Change voltage C. Increase current
