1. The primary purpose of a ground wire is to:
A. Carry current to the load
B. Prevent electrical shock
C. Increase voltage
D. Maintain resistance
Answer: B) Prevent electrical shock
Rationale: Ground wires direct stray currents safely into the earth,
reducing shock risk.
2. What type of electrical diagram shows the physical location of
components?
A. Schematic diagram
B. Wiring diagram
C. Block diagram
D. Layout diagram
Answer: D) Layout diagram
Rationale: Layout diagrams display the physical placement of
components.
3. Which electrical component stores charge and releases it when
needed?
,A. Transformer
B. Inductor
C. Capacitor
D. Resistor
Answer: C) Capacitor
Rationale: Capacitors temporarily store electrical energy as a charge.
4. Which of the following is NOT a type of circuit?
A. Open circuit
B. Short circuit
C. Resistive circuit
D. Capacitive circuit
Answer: D) Capacitive circuit
Rationale: Capacitors are components, not types of circuits.
5. In a circuit, resistance is measured in:
A. Volts
B. Ohms
C. Watts
D. Amps
Answer: B) Ohms
, Rationale: The ohm is the unit of electrical resistance.
6. Which type of circuit has only one path for current to flow?
A. Series circuit
B. Parallel circuit
C. Combination circuit
D. Open circuit
Answer: A) Series circuit
Rationale: In a series circuit, all components are connected end-to-end,
providing only one path for current.
7. What is the main purpose of a GFCI outlet?
A. Increase circuit capacity
B. Prevent overload
C. Protect against ground faults
D. Reduce energy consumption
Answer: C) Protect against ground faults
Rationale: GFCI outlets detect and interrupt ground faults to prevent
electrical shocks.
8. What is the typical voltage for residential electrical systems in the
United States?
A. Carry current to the load
B. Prevent electrical shock
C. Increase voltage
D. Maintain resistance
Answer: B) Prevent electrical shock
Rationale: Ground wires direct stray currents safely into the earth,
reducing shock risk.
2. What type of electrical diagram shows the physical location of
components?
A. Schematic diagram
B. Wiring diagram
C. Block diagram
D. Layout diagram
Answer: D) Layout diagram
Rationale: Layout diagrams display the physical placement of
components.
3. Which electrical component stores charge and releases it when
needed?
,A. Transformer
B. Inductor
C. Capacitor
D. Resistor
Answer: C) Capacitor
Rationale: Capacitors temporarily store electrical energy as a charge.
4. Which of the following is NOT a type of circuit?
A. Open circuit
B. Short circuit
C. Resistive circuit
D. Capacitive circuit
Answer: D) Capacitive circuit
Rationale: Capacitors are components, not types of circuits.
5. In a circuit, resistance is measured in:
A. Volts
B. Ohms
C. Watts
D. Amps
Answer: B) Ohms
, Rationale: The ohm is the unit of electrical resistance.
6. Which type of circuit has only one path for current to flow?
A. Series circuit
B. Parallel circuit
C. Combination circuit
D. Open circuit
Answer: A) Series circuit
Rationale: In a series circuit, all components are connected end-to-end,
providing only one path for current.
7. What is the main purpose of a GFCI outlet?
A. Increase circuit capacity
B. Prevent overload
C. Protect against ground faults
D. Reduce energy consumption
Answer: C) Protect against ground faults
Rationale: GFCI outlets detect and interrupt ground faults to prevent
electrical shocks.
8. What is the typical voltage for residential electrical systems in the
United States?
