Vermont Master Electrician Certification Practice
Exam Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100% Verified
Exam Highly Recommendable For Grade A+
1. A branch circuit supplies continuous lighting load of 20A. What is the
minimum ampacity required?
A. 20A
B. 25A
C. 30A
D. 40A
✔ Correct Answer: B. 25A (25A)
Explanation: Continuous loads must be calculated at 125% per NEC, so 20A
× 1.25 = 25A.
2. What is the minimum burial depth for direct-buried UF cable under a
residential driveway?
A. 12 inches
B. 18 inches
C. 24 inches
D. 36 inches
✔ Correct Answer: C. 24 inches (24 inches)
Explanation: NEC requires 24 inches for direct burial under driveways.
3. A 120V circuit draws 16A continuously. What size breaker is required?
A. 15A
B. 20A
C. 25A
D. 30A
, ✔ Correct Answer: B. 20A (20A)
Explanation: Continuous load requires 125%, so 16A × 1.25 = 20A breaker.
4. What is the minimum conductor size for a 30A circuit?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
✔ Correct Answer: C. 10 AWG (10 AWG)
Explanation: NEC ampacity tables require 10 AWG copper for 30A circuits.
5. What device protects against ground-fault current?
A. AFCI
B. GFCI
C. Breaker
D. Fuse
✔ Correct Answer: B. GFCI (GFCI)
Explanation: GFCI detects imbalance between hot and neutral currents.
6. Maximum voltage drop recommended for branch circuits?
A. 1%
B. 3%
C. 5%
D. 10%
✔ Correct Answer: B. 3% (3%)
Explanation: NEC recommends 3% max voltage drop for branch circuits.
7. What is the purpose of bonding?
A. Increase voltage
B. Reduce resistance
C. Ensure electrical continuity
D. Prevent overload
✔ Correct Answer: C. Ensure electrical continuity (Ensure electrical
, continuity)
Explanation: Bonding ensures metal parts are electrically connected.
8. Minimum working clearance in front of electrical panels?
A. 24 inches
B. 30 inches
C. 36 inches
D. 48 inches
✔ Correct Answer: C. 36 inches (36 inches)
Explanation: NEC requires 36 inches of clearance for safe access.
9. What is the standard frequency in the U.S.?
A. 50 Hz
B. 60 Hz
C. 120 Hz
D. 240 Hz
✔ Correct Answer: B. 60 Hz (60 Hz)
Explanation: U.S. electrical systems operate at 60 Hz.
10.What is the function of a transformer?
A. Store energy
B. Convert AC to DC
C. Change voltage levels
D. Measure current
✔ Correct Answer: C. Change voltage levels (Change voltage levels)
Explanation: Transformers step voltage up or down.
11.A motor draws high current at startup. What is this called?
A. Load current
B. Inrush current
C. Leakage current
D. Fault current
✔ Correct Answer: B. Inrush current (Inrush current)
Explanation: Motors draw high initial current when starting.
Exam Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100% Verified
Exam Highly Recommendable For Grade A+
1. A branch circuit supplies continuous lighting load of 20A. What is the
minimum ampacity required?
A. 20A
B. 25A
C. 30A
D. 40A
✔ Correct Answer: B. 25A (25A)
Explanation: Continuous loads must be calculated at 125% per NEC, so 20A
× 1.25 = 25A.
2. What is the minimum burial depth for direct-buried UF cable under a
residential driveway?
A. 12 inches
B. 18 inches
C. 24 inches
D. 36 inches
✔ Correct Answer: C. 24 inches (24 inches)
Explanation: NEC requires 24 inches for direct burial under driveways.
3. A 120V circuit draws 16A continuously. What size breaker is required?
A. 15A
B. 20A
C. 25A
D. 30A
, ✔ Correct Answer: B. 20A (20A)
Explanation: Continuous load requires 125%, so 16A × 1.25 = 20A breaker.
4. What is the minimum conductor size for a 30A circuit?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
✔ Correct Answer: C. 10 AWG (10 AWG)
Explanation: NEC ampacity tables require 10 AWG copper for 30A circuits.
5. What device protects against ground-fault current?
A. AFCI
B. GFCI
C. Breaker
D. Fuse
✔ Correct Answer: B. GFCI (GFCI)
Explanation: GFCI detects imbalance between hot and neutral currents.
6. Maximum voltage drop recommended for branch circuits?
A. 1%
B. 3%
C. 5%
D. 10%
✔ Correct Answer: B. 3% (3%)
Explanation: NEC recommends 3% max voltage drop for branch circuits.
7. What is the purpose of bonding?
A. Increase voltage
B. Reduce resistance
C. Ensure electrical continuity
D. Prevent overload
✔ Correct Answer: C. Ensure electrical continuity (Ensure electrical
, continuity)
Explanation: Bonding ensures metal parts are electrically connected.
8. Minimum working clearance in front of electrical panels?
A. 24 inches
B. 30 inches
C. 36 inches
D. 48 inches
✔ Correct Answer: C. 36 inches (36 inches)
Explanation: NEC requires 36 inches of clearance for safe access.
9. What is the standard frequency in the U.S.?
A. 50 Hz
B. 60 Hz
C. 120 Hz
D. 240 Hz
✔ Correct Answer: B. 60 Hz (60 Hz)
Explanation: U.S. electrical systems operate at 60 Hz.
10.What is the function of a transformer?
A. Store energy
B. Convert AC to DC
C. Change voltage levels
D. Measure current
✔ Correct Answer: C. Change voltage levels (Change voltage levels)
Explanation: Transformers step voltage up or down.
11.A motor draws high current at startup. What is this called?
A. Load current
B. Inrush current
C. Leakage current
D. Fault current
✔ Correct Answer: B. Inrush current (Inrush current)
Explanation: Motors draw high initial current when starting.
