1. What is the function of a load in an electrical circuit?
A. Generate power
B. Consume power
C. Reduce resistance
D. Measure voltage
Answer: B) Consume power
Rationale: Loads use electrical energy to perform work, such as
lighting or powering devices.
2. The device used to step up or step down voltage is a:
A. Capacitor
B. Transformer
C. Resistor
D. Inductor
Answer: B) Transformer
Rationale: Transformers adjust voltage levels to match circuit
requirements.
3. A three-way switch is commonly used to:
A. Turn lights on and off from two locations
,B. Control fan speed
C. Adjust voltage
D. Measure resistance
Answer: A) Turn lights on and off from two locations
Rationale: Three-way switches allow control of a light fixture from two
different locations.
4. In a DC circuit, the direction of current flow is:
A. Alternating
B. Constant
C. Reversing periodically
D. Varying with frequency
Answer: B) Constant
Rationale: In a direct current (DC) circuit, current flows consistently in
one direction.
5. Which tool is used to strip insulation from electrical wires?
A. Pliers
B. Wire strippers
C. Screwdriver
D. Multimeter
Answer: B) Wire strippers
, Rationale: Wire strippers remove insulation without damaging the wire
itself.
6. What color wire is typically used for grounding in residential
wiring?
A. Black
B. White
C. Green
D. Red
Answer: C) Green
Rationale: The green wire is the standard color for grounding to ensure
safety.
7. Which formula represents electrical resistance?
A. R = V/I
B. R = VI
C. R = P/V
D. R = I/V
Answer: A) R = V/I
Rationale: Resistance is calculated as voltage divided by current.
8. Which device protects a circuit from excess current?
A. Generate power
B. Consume power
C. Reduce resistance
D. Measure voltage
Answer: B) Consume power
Rationale: Loads use electrical energy to perform work, such as
lighting or powering devices.
2. The device used to step up or step down voltage is a:
A. Capacitor
B. Transformer
C. Resistor
D. Inductor
Answer: B) Transformer
Rationale: Transformers adjust voltage levels to match circuit
requirements.
3. A three-way switch is commonly used to:
A. Turn lights on and off from two locations
,B. Control fan speed
C. Adjust voltage
D. Measure resistance
Answer: A) Turn lights on and off from two locations
Rationale: Three-way switches allow control of a light fixture from two
different locations.
4. In a DC circuit, the direction of current flow is:
A. Alternating
B. Constant
C. Reversing periodically
D. Varying with frequency
Answer: B) Constant
Rationale: In a direct current (DC) circuit, current flows consistently in
one direction.
5. Which tool is used to strip insulation from electrical wires?
A. Pliers
B. Wire strippers
C. Screwdriver
D. Multimeter
Answer: B) Wire strippers
, Rationale: Wire strippers remove insulation without damaging the wire
itself.
6. What color wire is typically used for grounding in residential
wiring?
A. Black
B. White
C. Green
D. Red
Answer: C) Green
Rationale: The green wire is the standard color for grounding to ensure
safety.
7. Which formula represents electrical resistance?
A. R = V/I
B. R = VI
C. R = P/V
D. R = I/V
Answer: A) R = V/I
Rationale: Resistance is calculated as voltage divided by current.
8. Which device protects a circuit from excess current?
