Indiana Electrical Contractor Exam
Practice Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. What is the primary purpose of the Indiana Electrical Code?
A. To establish utility electricity rates
B. To regulate electrical equipment manufacturing
C. To establish enforceable safety requirements for electrical installations
D. To determine contractor profit margins
Rationale: The Indiana Electrical Code establishes enforceable requirements for
electrical systems and components intended to protect people and property from
electrical hazards.
2. Which NEC article primarily addresses grounding and bonding?
A. Article 110
B. Article 210
C. Article 250
D. Article 430
Rationale: Article 250 contains the principal NEC requirements for grounding and
bonding, including grounding electrodes, grounding electrode conductors,
equipment grounding conductors, and bonding.
3. A 240-volt resistive load draws 25 amperes. What is its approximate power?
A. 4,800 watts
B. 5,000 watts
,C. 6,000 watts
D. 8,000 watts
Rationale: Power is calculated as P = E × I. Therefore, 240 volts × 25 amperes =
6,000 watts.
4. What is the primary purpose of an overcurrent protective device?
A. To increase the circuit's available voltage
B. To protect conductors and equipment from excessive current
C. To provide normal neutral current
D. To establish the grounding electrode system
Rationale: Fuses and circuit breakers protect electrical circuits by interrupting
excessive current before conductors or equipment are subjected to damaging
conditions.
5. Which conductor is normally identified by white or gray insulation in a typical
wiring system?
A. Ungrounded conductor
B. Grounded conductor
C. Equipment grounding conductor
D. Grounding electrode conductor
Rationale: The grounded conductor is generally identified by white or gray
insulation or other permitted identification methods. Equipment grounding
conductors are generally identified using green or bare conductors.
6. What is the primary function of an equipment grounding conductor?
A. To carry normal load current
B. To provide the circuit neutral
C. To increase circuit ampacity
D. To provide a path for fault current
,Rationale: The equipment grounding conductor provides a low-impedance path
for fault current so that the overcurrent protective device can operate and
disconnect the fault.
7. A continuous load is generally included at what percentage of its actual load
when sizing conductors and overcurrent protection?
A. 80%
B. 100%
C. 125%
D. 150%
Rationale: Under the applicable NEC rules, continuous loads are generally
calculated at 125% of their actual load when sizing conductors and overcurrent
protection.
8. Which NEC article primarily covers branch circuits?
A. Article 200
B. Article 210
C. Article 220
D. Article 230
Rationale: Article 210 contains requirements for branch circuits, including ratings,
conductors, required outlets, and branch-circuit protection.
9. What is the primary purpose of a feeder?
A. To connect a switch to a lighting fixture
B. To establish the grounding electrode
C. To distribute power to branch-circuit or distribution equipment
D. To replace the service disconnect
Rationale: A feeder carries power from service equipment or another source to
branch-circuit distribution equipment, panelboards, or other permitted loads.
, 10. Which calculation is used to determine apparent power in a single-phase AC
circuit?
A. VA = R × I
B. VA = E ÷ I
C. VA = E × I
D. VA = E + I
Rationale: Apparent power in a single-phase circuit is calculated as voltage
multiplied by current and is expressed in volt-amperes.
11. A 120-volt load consumes 2,400 watts. Approximately how much current
does it draw?
A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 25 amperes
Rationale: Using I = P ÷ E, the current is 2,400 watts ÷ 120 volts = 20 amperes.
12. What is the approximate resistance of a 240-volt load drawing 12 amperes?
A. 10 ohms
B. 20 ohms
C. 28.8 ohms
D. 40 ohms
Rationale: Ohm's law gives R = E ÷ I. Therefore, 240 volts ÷ 12 amperes = 20 ohms.
13. What is the main purpose of bonding electrical equipment?
A. To increase the operating voltage
B. To reduce conductor size
Practice Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. What is the primary purpose of the Indiana Electrical Code?
A. To establish utility electricity rates
B. To regulate electrical equipment manufacturing
C. To establish enforceable safety requirements for electrical installations
D. To determine contractor profit margins
Rationale: The Indiana Electrical Code establishes enforceable requirements for
electrical systems and components intended to protect people and property from
electrical hazards.
2. Which NEC article primarily addresses grounding and bonding?
A. Article 110
B. Article 210
C. Article 250
D. Article 430
Rationale: Article 250 contains the principal NEC requirements for grounding and
bonding, including grounding electrodes, grounding electrode conductors,
equipment grounding conductors, and bonding.
3. A 240-volt resistive load draws 25 amperes. What is its approximate power?
A. 4,800 watts
B. 5,000 watts
,C. 6,000 watts
D. 8,000 watts
Rationale: Power is calculated as P = E × I. Therefore, 240 volts × 25 amperes =
6,000 watts.
4. What is the primary purpose of an overcurrent protective device?
A. To increase the circuit's available voltage
B. To protect conductors and equipment from excessive current
C. To provide normal neutral current
D. To establish the grounding electrode system
Rationale: Fuses and circuit breakers protect electrical circuits by interrupting
excessive current before conductors or equipment are subjected to damaging
conditions.
5. Which conductor is normally identified by white or gray insulation in a typical
wiring system?
A. Ungrounded conductor
B. Grounded conductor
C. Equipment grounding conductor
D. Grounding electrode conductor
Rationale: The grounded conductor is generally identified by white or gray
insulation or other permitted identification methods. Equipment grounding
conductors are generally identified using green or bare conductors.
6. What is the primary function of an equipment grounding conductor?
A. To carry normal load current
B. To provide the circuit neutral
C. To increase circuit ampacity
D. To provide a path for fault current
,Rationale: The equipment grounding conductor provides a low-impedance path
for fault current so that the overcurrent protective device can operate and
disconnect the fault.
7. A continuous load is generally included at what percentage of its actual load
when sizing conductors and overcurrent protection?
A. 80%
B. 100%
C. 125%
D. 150%
Rationale: Under the applicable NEC rules, continuous loads are generally
calculated at 125% of their actual load when sizing conductors and overcurrent
protection.
8. Which NEC article primarily covers branch circuits?
A. Article 200
B. Article 210
C. Article 220
D. Article 230
Rationale: Article 210 contains requirements for branch circuits, including ratings,
conductors, required outlets, and branch-circuit protection.
9. What is the primary purpose of a feeder?
A. To connect a switch to a lighting fixture
B. To establish the grounding electrode
C. To distribute power to branch-circuit or distribution equipment
D. To replace the service disconnect
Rationale: A feeder carries power from service equipment or another source to
branch-circuit distribution equipment, panelboards, or other permitted loads.
, 10. Which calculation is used to determine apparent power in a single-phase AC
circuit?
A. VA = R × I
B. VA = E ÷ I
C. VA = E × I
D. VA = E + I
Rationale: Apparent power in a single-phase circuit is calculated as voltage
multiplied by current and is expressed in volt-amperes.
11. A 120-volt load consumes 2,400 watts. Approximately how much current
does it draw?
A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 25 amperes
Rationale: Using I = P ÷ E, the current is 2,400 watts ÷ 120 volts = 20 amperes.
12. What is the approximate resistance of a 240-volt load drawing 12 amperes?
A. 10 ohms
B. 20 ohms
C. 28.8 ohms
D. 40 ohms
Rationale: Ohm's law gives R = E ÷ I. Therefore, 240 volts ÷ 12 amperes = 20 ohms.
13. What is the main purpose of bonding electrical equipment?
A. To increase the operating voltage
B. To reduce conductor size
