Louisiana Electrical Contractor Practice
Exam | 100 Most Tested Questions
Collection & Verified Detailed Answers |
Tutor Verified Success Exam) Graded A+
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To establish electrical equipment prices
B. To regulate electrical utility rates
C. To provide minimum safety standards for electrical installations
D. To train electricians
Answer: C. To provide minimum safety standards for electrical
installations
The NEC establishes minimum requirements intended to protect
people and property from electrical hazards.
2. In Louisiana, an electrical contractor license is primarily required
to:
A. Purchase electrical tools
B. Perform electrical contracting work for compensation
C. Work only on personal residences
D. Teach electrical classes
Answer: B. Perform electrical contracting work for compensation
Contractors performing electrical work commercially must comply
with Louisiana licensing requirements.
3. The unit used to measure electrical resistance is:
,A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C. Ohm
Resistance is measured in ohms (Ω), which represents opposition to
current flow.
4. Ohm’s Law states that:
A. P = I × E
B. E = I × R
C. R = P × I
D. W = E ÷ R
Answer: B. E = I × R
Ohm’s Law defines the relationship between voltage, current, and
resistance.
5. A circuit breaker is designed primarily to:
A. Increase voltage
B. Measure resistance
C. Protect against overcurrent
D. Store electrical energy
Answer: C. Protect against overcurrent
Circuit breakers open circuits when current exceeds safe levels.
6. The color normally used for grounded (neutral) conductors is:
,A. Green
B. White or gray
C. Red
D. Orange
Answer: B. White or gray
The NEC identifies grounded conductors with white or gray
insulation.
7. The grounding conductor is typically identified by:
A. Green insulation or bare copper
B. White insulation
C. Black insulation
D. Yellow insulation
Answer: A. Green insulation or bare copper
Equipment grounding conductors provide a safe path for fault
current.
8. The formula for electrical power is:
A. P = E × I
B. P = R ÷ I
C. P = E ÷ R
D. P = I − R
Answer: A. P = E × I
Power in watts equals voltage multiplied by current.
9. A GFCI device protects against:
, A. High voltage transmission failures
B. Ground-fault shock hazards
C. Low battery conditions
D. Motor overheating only
Answer: B. Ground-fault shock hazards
GFCIs quickly disconnect power when they detect dangerous leakage
current.
10. The maximum allowable current for a conductor depends
mainly on:
A. Wire color
B. Ampacity rating
C. Conduit length only
D. Manufacturer name
Answer: B. Ampacity rating
Ampacity is the maximum current a conductor can safely carry.
11. A service entrance conductor supplies power from:
A. A motor to a switch
B. The utility source to the building service equipment
C. A receptacle to a lamp
D. A transformer to a generator
Answer: B. The utility source to the building service equipment
Service conductors deliver electrical power from the utility to the
premises.
12. A disconnecting means must be:
Exam | 100 Most Tested Questions
Collection & Verified Detailed Answers |
Tutor Verified Success Exam) Graded A+
1. What is the primary purpose of the National Electrical Code
(NEC)?
A. To establish electrical equipment prices
B. To regulate electrical utility rates
C. To provide minimum safety standards for electrical installations
D. To train electricians
Answer: C. To provide minimum safety standards for electrical
installations
The NEC establishes minimum requirements intended to protect
people and property from electrical hazards.
2. In Louisiana, an electrical contractor license is primarily required
to:
A. Purchase electrical tools
B. Perform electrical contracting work for compensation
C. Work only on personal residences
D. Teach electrical classes
Answer: B. Perform electrical contracting work for compensation
Contractors performing electrical work commercially must comply
with Louisiana licensing requirements.
3. The unit used to measure electrical resistance is:
,A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C. Ohm
Resistance is measured in ohms (Ω), which represents opposition to
current flow.
4. Ohm’s Law states that:
A. P = I × E
B. E = I × R
C. R = P × I
D. W = E ÷ R
Answer: B. E = I × R
Ohm’s Law defines the relationship between voltage, current, and
resistance.
5. A circuit breaker is designed primarily to:
A. Increase voltage
B. Measure resistance
C. Protect against overcurrent
D. Store electrical energy
Answer: C. Protect against overcurrent
Circuit breakers open circuits when current exceeds safe levels.
6. The color normally used for grounded (neutral) conductors is:
,A. Green
B. White or gray
C. Red
D. Orange
Answer: B. White or gray
The NEC identifies grounded conductors with white or gray
insulation.
7. The grounding conductor is typically identified by:
A. Green insulation or bare copper
B. White insulation
C. Black insulation
D. Yellow insulation
Answer: A. Green insulation or bare copper
Equipment grounding conductors provide a safe path for fault
current.
8. The formula for electrical power is:
A. P = E × I
B. P = R ÷ I
C. P = E ÷ R
D. P = I − R
Answer: A. P = E × I
Power in watts equals voltage multiplied by current.
9. A GFCI device protects against:
, A. High voltage transmission failures
B. Ground-fault shock hazards
C. Low battery conditions
D. Motor overheating only
Answer: B. Ground-fault shock hazards
GFCIs quickly disconnect power when they detect dangerous leakage
current.
10. The maximum allowable current for a conductor depends
mainly on:
A. Wire color
B. Ampacity rating
C. Conduit length only
D. Manufacturer name
Answer: B. Ampacity rating
Ampacity is the maximum current a conductor can safely carry.
11. A service entrance conductor supplies power from:
A. A motor to a switch
B. The utility source to the building service equipment
C. A receptacle to a lamp
D. A transformer to a generator
Answer: B. The utility source to the building service equipment
Service conductors deliver electrical power from the utility to the
premises.
12. A disconnecting means must be:
