ELECTRICAL LICENSE EXAM| CORRECT ANSWERS WITH RATIONALES. A+ GUARANTEED SUCCESS

ELECTRICAL LICENSE EXAM| CORRECT
ANSWERS WITH RATIONALES. A+
GUARANTEED SUCCESS


1. What is the unit of electrical current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: B
Rationale: Current is measured in amperes (amps),
indicating the flow of electric charge.


2. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C
Rationale: Resistance is measured in ohms (Ω), representing
opposition to current.

,3. What is the unit of electrical voltage?
A. Volt
B. Ampere
C. Ohm
D. Watt


Answer: A
Rationale: Voltage measures the potential difference
between two points in a circuit.


4. What is the unit of electrical power?
A. Volt
B. Ampere
C. Ohm
D. Watt


Answer: D
Rationale: Power is measured in watts (W), calculated as
voltage × current.


5. Which type of current flows in one direction only?
A. AC
B. DC

,C. Both AC and DC
D. None


Answer: B
Rationale: Direct current (DC) flows in a single, constant
direction.


6. Which type of current reverses direction periodically?
A. AC
B. DC
C. Both AC and DC
D. None


Answer: A
Rationale: Alternating current (AC) changes direction,
typically 50–60 times per second.


7. Ohm’s Law states that:
A. V = I × R
B. V = I / R
C. I = V × R
D. R = I × V

, Answer: A
Rationale: Voltage equals current multiplied by resistance.


8. Which device protects circuits from overcurrent?
A. Resistor
B. Fuse
C. Capacitor
D. Transformer


Answer: B
Rationale: Fuses melt when current exceeds safe levels,
preventing damage.


9. Which device can automatically reset after tripping?
A. Fuse
B. Circuit breaker
C. Transformer
D. Conductor


Answer: B
Rationale: Circuit breakers interrupt overcurrent and can
be reset manually.