APPRENTICE ELECTRICIAN PRACTICE EXAM
NEWEST 2026 UPDATE — ACTUAL QUESTIONS &
CORRECT ANSWERS | ALREADY GRADED A+
Content Covered (Most Tested Areas):
• Electrical Safety & OSHA
• NEC General Requirements
• Basic Electrical Theory (Ohm’s Law, Power Formula)
• Series & Parallel Circuits
• Conductors & Ampacity
• Conduit & Box Fill
• Grounding & Bonding
• Motors & Transformers
• Tools & Test Instruments
• Blueprint & Symbol Reading
1. What is the primary purpose of a circuit breaker?
A. Increase voltage
B. Reduce resistance
C. Protect conductors from overcurrent
D. Improve power factor
Answer: C. Protect conductors from overcurrent
Circuit breakers open the circuit when current exceeds safe limits to
prevent overheating and fire.
, 2. According to NEC, what color is typically used for grounded
(neutral) conductors?
A. Green
B. White
C. Red
D. Black
Answer: B. White
NEC designates white or gray for grounded (neutral) conductors.
3. Using Ohm’s Law, what is the current if voltage is 120V and
resistance is 20 ohms?
A. 4 A
B. 5 A
C. 6 A
D. 8 A
Answer: C. 6 A
I = V ÷ R → 120 ÷ 20 = 6 amps.
4. What device is used to verify absence of voltage?
A. Clamp meter
B. Megger
C. Voltmeter
D. Wiggy tester
Answer: C. Voltmeter
A voltmeter confirms whether voltage is present before servicing
equipment.
, 5. A series circuit has how many paths for current?
A. One
B. Two
C. Three
D. Unlimited
Answer: A. One
A series circuit provides only one continuous path for current flow.
6. Electrical power is calculated by which formula?
A. P = V ÷ I
B. P = V × I
C. P = I ÷ R
D. P = R × I
Answer: B. P = V × I
Electrical power equals voltage multiplied by current.
7. What is the minimum working space clearance in front of a
120/240V panel (typically)?
A. 24 inches
B. 30 inches
C. 36 inches
D. 48 inches
Answer: C. 36 inches
NEC generally requires 3 feet (36 inches) of working clearance.
NEWEST 2026 UPDATE — ACTUAL QUESTIONS &
CORRECT ANSWERS | ALREADY GRADED A+
Content Covered (Most Tested Areas):
• Electrical Safety & OSHA
• NEC General Requirements
• Basic Electrical Theory (Ohm’s Law, Power Formula)
• Series & Parallel Circuits
• Conductors & Ampacity
• Conduit & Box Fill
• Grounding & Bonding
• Motors & Transformers
• Tools & Test Instruments
• Blueprint & Symbol Reading
1. What is the primary purpose of a circuit breaker?
A. Increase voltage
B. Reduce resistance
C. Protect conductors from overcurrent
D. Improve power factor
Answer: C. Protect conductors from overcurrent
Circuit breakers open the circuit when current exceeds safe limits to
prevent overheating and fire.
, 2. According to NEC, what color is typically used for grounded
(neutral) conductors?
A. Green
B. White
C. Red
D. Black
Answer: B. White
NEC designates white or gray for grounded (neutral) conductors.
3. Using Ohm’s Law, what is the current if voltage is 120V and
resistance is 20 ohms?
A. 4 A
B. 5 A
C. 6 A
D. 8 A
Answer: C. 6 A
I = V ÷ R → 120 ÷ 20 = 6 amps.
4. What device is used to verify absence of voltage?
A. Clamp meter
B. Megger
C. Voltmeter
D. Wiggy tester
Answer: C. Voltmeter
A voltmeter confirms whether voltage is present before servicing
equipment.
, 5. A series circuit has how many paths for current?
A. One
B. Two
C. Three
D. Unlimited
Answer: A. One
A series circuit provides only one continuous path for current flow.
6. Electrical power is calculated by which formula?
A. P = V ÷ I
B. P = V × I
C. P = I ÷ R
D. P = R × I
Answer: B. P = V × I
Electrical power equals voltage multiplied by current.
7. What is the minimum working space clearance in front of a
120/240V panel (typically)?
A. 24 inches
B. 30 inches
C. 36 inches
D. 48 inches
Answer: C. 36 inches
NEC generally requires 3 feet (36 inches) of working clearance.
