Maryland Master Restricted Electrician
Exam With Actual Questions & Correct
Answers, Plus Rationales/Expert Verified
For Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical appliances
B. To provide safety standards for electrical installations
C. To calculate electrical billing
D. To manufacture electrical equipment
Answer: B
Rationale: The NEC establishes safety requirements to protect
people and property from electrical hazards.
2. The standard voltage for most residential branch circuits is:
A. 120/240V
B. 277/480V
C. 600V
D. 24V
Answer: A
Rationale: Most residential systems use a 120/240V split-phase
system.
,3. What does Ohm’s Law state?
A. P = IV
B. V = IR
C. I = P/V
D. R = P/I
Answer: B
Rationale: Ohm’s Law defines voltage as current multiplied by
resistance.
4. The purpose of a circuit breaker is to:
A. Increase voltage
B. Store electricity
C. Protect against overcurrent
D. Reduce resistance
Answer: C
Rationale: Circuit breakers automatically open a circuit during
overload or fault conditions.
5. Grounding in an electrical system is primarily used to:
A. Increase current flow
B. Stabilize voltage and provide fault path
C. Reduce wire size
D. Increase resistance
Answer: B
Rationale: Grounding provides a safe path for fault current and
stabilizes system voltage.
,6. A GFCI device protects against:
A. Overvoltage
B. Short circuits
C. Ground faults
D. High resistance
Answer: C
Rationale: GFCIs detect imbalance in current and trip during
ground faults.
7. What is the unit of electrical power?
A. Volt
B. Ampere
C. Watt
D. Ohm
Answer: C
Rationale: Watts measure electrical power consumption.
8. A conductor’s resistance will generally:
A. Decrease with length
B. Increase with shorter length
C. Increase with length
D. Remain unchanged
Answer: C
Rationale: Longer conductors have greater resistance.
9. Which color is commonly used for equipment grounding
conductors?
A. White
, B. Green
C. Black
D. Red
Answer: B
Rationale: Green or bare conductors are used for grounding.
10. The function of a transformer is to:
A. Store energy
B. Change AC voltage levels
C. Convert AC to DC
D. Increase resistance
Answer: B
Rationale: Transformers step voltage up or down using
electromagnetic induction.
11. Which device interrupts excessive current automatically?
A. Switch
B. Fuse
C. Conduit
D. Receptacle
Answer: B
Rationale: Fuses melt and open the circuit under overcurrent
conditions.
12. What is the purpose of a neutral conductor?
A. Carry fault current only
B. Carry return current in normal operation
C. Provide grounding
Exam With Actual Questions & Correct
Answers, Plus Rationales/Expert Verified
For Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To design electrical appliances
B. To provide safety standards for electrical installations
C. To calculate electrical billing
D. To manufacture electrical equipment
Answer: B
Rationale: The NEC establishes safety requirements to protect
people and property from electrical hazards.
2. The standard voltage for most residential branch circuits is:
A. 120/240V
B. 277/480V
C. 600V
D. 24V
Answer: A
Rationale: Most residential systems use a 120/240V split-phase
system.
,3. What does Ohm’s Law state?
A. P = IV
B. V = IR
C. I = P/V
D. R = P/I
Answer: B
Rationale: Ohm’s Law defines voltage as current multiplied by
resistance.
4. The purpose of a circuit breaker is to:
A. Increase voltage
B. Store electricity
C. Protect against overcurrent
D. Reduce resistance
Answer: C
Rationale: Circuit breakers automatically open a circuit during
overload or fault conditions.
5. Grounding in an electrical system is primarily used to:
A. Increase current flow
B. Stabilize voltage and provide fault path
C. Reduce wire size
D. Increase resistance
Answer: B
Rationale: Grounding provides a safe path for fault current and
stabilizes system voltage.
,6. A GFCI device protects against:
A. Overvoltage
B. Short circuits
C. Ground faults
D. High resistance
Answer: C
Rationale: GFCIs detect imbalance in current and trip during
ground faults.
7. What is the unit of electrical power?
A. Volt
B. Ampere
C. Watt
D. Ohm
Answer: C
Rationale: Watts measure electrical power consumption.
8. A conductor’s resistance will generally:
A. Decrease with length
B. Increase with shorter length
C. Increase with length
D. Remain unchanged
Answer: C
Rationale: Longer conductors have greater resistance.
9. Which color is commonly used for equipment grounding
conductors?
A. White
, B. Green
C. Black
D. Red
Answer: B
Rationale: Green or bare conductors are used for grounding.
10. The function of a transformer is to:
A. Store energy
B. Change AC voltage levels
C. Convert AC to DC
D. Increase resistance
Answer: B
Rationale: Transformers step voltage up or down using
electromagnetic induction.
11. Which device interrupts excessive current automatically?
A. Switch
B. Fuse
C. Conduit
D. Receptacle
Answer: B
Rationale: Fuses melt and open the circuit under overcurrent
conditions.
12. What is the purpose of a neutral conductor?
A. Carry fault current only
B. Carry return current in normal operation
C. Provide grounding
