Louisiana Electrical Contractor
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of an electrical contractor license?
A. To allow unrestricted electrical work without inspections
B. To establish qualification to perform electrical contracting work in
accordance with applicable requirements
C. To eliminate the need for permits
D. To permit only residential electrical work
Answer: B. To establish qualification to perform electrical contracting
work in accordance with applicable requirements
Rationale: A contractor license establishes that the contractor has met
applicable qualification and regulatory requirements for performing
electrical contracting work. Licensing does not eliminate permits,
inspections, or code compliance obligations.
2. Which organization is primarily responsible for developing the
National Electrical Code?
A. OSHA
B. NFPA
C. EPA
D. ASTM
Answer: B. NFPA
,Rationale: The National Electrical Code, commonly identified as
NFPA 70, is developed and published by the National Fire Protection
Association.
3. What is the principal purpose of the National Electrical Code?
A. To establish electrical utility rates
B. To provide practical safeguards for persons and property from
hazards arising from electrical installations
C. To regulate electrician wages
D. To establish contractor advertising requirements
Answer: B. To provide practical safeguards for persons and property
from hazards arising from electrical installations
Rationale: The NEC is primarily a safety standard intended to provide
safeguards against hazards associated with electricity.
4. Which unit measures electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C. Ampere
Rationale: The ampere, commonly called the amp, is the unit used to
measure electric current.
5. Which unit measures electrical resistance?
A. Volt
B. Ohm
C. Watt
D. Ampere
,Answer: B. Ohm
Rationale: Electrical resistance is measured in ohms and represents
opposition to current flow.
6. Which formula represents Ohm's law?
A. P = I/R
B. E = I × R
C. R = E × I
D. I = E × R
Answer: B. E = I × R
Rationale: Ohm's law states that voltage equals current multiplied by
resistance. The relationship can also be rearranged to determine
current or resistance.
7. A 120-volt circuit has a resistance of 20 ohms. Approximately how
much current flows?
A. 2 A
B. 4 A
C. 6 A
D. 10 A
Answer: C. 6 A
Rationale: Using I = E/R, 120 volts divided by 20 ohms equals 6
amperes.
8. What is the unit of electrical power?
A. Watt
B. Ohm
C. Volt
D. Coulomb
, Answer: A. Watt
Rationale: Electrical power is measured in watts. In a simple DC
circuit, power can be calculated as voltage multiplied by current.
9. Which formula is commonly used to calculate electrical power in a
single-phase circuit?
A. P = E × I
B. P = E/R
C. P = R/I
D. P = I/R
Answer: A. P = E × I
Rationale: For a single-phase resistive load, electrical power in watts
equals voltage multiplied by current.
10. What is the approximate current of a 2,400-watt, 240-volt
resistive load?
A. 5 A
B. 10 A
C. 20 A
D. 40 A
Answer: B. 10 A
Rationale: Current is calculated by dividing power by voltage: 2,400 ÷
240 = 10 amperes.
11. What is alternating current?
A. Current that flows only in one direction
B. Current that periodically changes direction
C. Current that cannot produce heat
D. Current used only in batteries
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of an electrical contractor license?
A. To allow unrestricted electrical work without inspections
B. To establish qualification to perform electrical contracting work in
accordance with applicable requirements
C. To eliminate the need for permits
D. To permit only residential electrical work
Answer: B. To establish qualification to perform electrical contracting
work in accordance with applicable requirements
Rationale: A contractor license establishes that the contractor has met
applicable qualification and regulatory requirements for performing
electrical contracting work. Licensing does not eliminate permits,
inspections, or code compliance obligations.
2. Which organization is primarily responsible for developing the
National Electrical Code?
A. OSHA
B. NFPA
C. EPA
D. ASTM
Answer: B. NFPA
,Rationale: The National Electrical Code, commonly identified as
NFPA 70, is developed and published by the National Fire Protection
Association.
3. What is the principal purpose of the National Electrical Code?
A. To establish electrical utility rates
B. To provide practical safeguards for persons and property from
hazards arising from electrical installations
C. To regulate electrician wages
D. To establish contractor advertising requirements
Answer: B. To provide practical safeguards for persons and property
from hazards arising from electrical installations
Rationale: The NEC is primarily a safety standard intended to provide
safeguards against hazards associated with electricity.
4. Which unit measures electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C. Ampere
Rationale: The ampere, commonly called the amp, is the unit used to
measure electric current.
5. Which unit measures electrical resistance?
A. Volt
B. Ohm
C. Watt
D. Ampere
,Answer: B. Ohm
Rationale: Electrical resistance is measured in ohms and represents
opposition to current flow.
6. Which formula represents Ohm's law?
A. P = I/R
B. E = I × R
C. R = E × I
D. I = E × R
Answer: B. E = I × R
Rationale: Ohm's law states that voltage equals current multiplied by
resistance. The relationship can also be rearranged to determine
current or resistance.
7. A 120-volt circuit has a resistance of 20 ohms. Approximately how
much current flows?
A. 2 A
B. 4 A
C. 6 A
D. 10 A
Answer: C. 6 A
Rationale: Using I = E/R, 120 volts divided by 20 ohms equals 6
amperes.
8. What is the unit of electrical power?
A. Watt
B. Ohm
C. Volt
D. Coulomb
, Answer: A. Watt
Rationale: Electrical power is measured in watts. In a simple DC
circuit, power can be calculated as voltage multiplied by current.
9. Which formula is commonly used to calculate electrical power in a
single-phase circuit?
A. P = E × I
B. P = E/R
C. P = R/I
D. P = I/R
Answer: A. P = E × I
Rationale: For a single-phase resistive load, electrical power in watts
equals voltage multiplied by current.
10. What is the approximate current of a 2,400-watt, 240-volt
resistive load?
A. 5 A
B. 10 A
C. 20 A
D. 40 A
Answer: B. 10 A
Rationale: Current is calculated by dividing power by voltage: 2,400 ÷
240 = 10 amperes.
11. What is alternating current?
A. Current that flows only in one direction
B. Current that periodically changes direction
C. Current that cannot produce heat
D. Current used only in batteries
