G17-N G17 Journeyman Electrician Exam
Question 1 According to the NEC, which article covers requirements for grounding and bonding?
- Article 210
- Article 250
- Article 300
- Article 110
Answer: B
Explanation: NEC Article 250 sets forth detailed grounding and bonding guidelines.
Question 2 What is the primary purpose of the National Electrical Code (NEC)?
- Increase the cost of installations
- Ensure uniform wiring colors
- Safeguard persons and property from electrical hazards
- Promote proprietary installation methods
Answer: C
Explanation: The NEC aims to protect life and property by setting minimum standards for safe installations.
Question 3 1 / 4
G17-N G17 Journeyman Electrician Exam
Which NEC section primarily deals with overcurrent protection?
- Article 110
- Article 210
- Article 240
- Article 690
Answer: C
Explanation: NEC Article 240 covers overcurrent protection requirements and device ratings.
Question 4 Ohm’s Law is represented by which formula?
A) E = IR
B) P = IV
C) E = I/P
D) R = E + I
Answer: A
Explanation: Ohm’s Law states voltage (E) equals current (I) times resistance (R).
Question 5 In a series circuit, which value remains constant throughout all elements?
- Voltage 2 / 4
G17-N G17 Journeyman Electrician Exam
- Current
- Resistance
- Power
Answer: B
Explanation: In series circuits, current is the same through every component.
Question 6 How often does the NEC typically undergo major revisions?
- Every year
- Every 3 years
- Every 10 years
- Every 6 months
Answer: B
Explanation: The NEC is updated on a three-year cycle, introducing new or revised requirements.
Question 7 Which of the following is a correct statement about grounded conductors?
- They are always green in color
- They carry unbalanced current in certain cases 3 / 4
G17-N G17 Journeyman Electrician Exam
- They are protected by the equipment grounding conductor
- They must be fused separately in each circuit
Answer: B
Explanation: The grounded (neutral) conductor can carry the imbalance of current in multi-wire branch circuits.
Question 8 Which type of circuit breaker trips when a small difference between the hot and neutral current is detected?
A) AFCI
B) GFCI
C) HACR
- Instantaneous
Answer: B
Explanation: A Ground Fault Circuit Interrupter (GFCI) detects current imbalance to protect against electric shock.
Question 9 What is the unit of electrical power?
- Volt
- Ampere
- / 4