,1. The primary purpose of an electrical distribution system is to:
A. Generate electricity at the customer location
B. Deliver electrical power safely from substations to customers
C. Eliminate the need for transformers
D. Increase conductor resistance
Explanation: Distribution systems deliver electrical energy from substations
through feeders and transformers to homes, businesses, and other electrical loads.
2. The National Electrical Code (NEC) is primarily intended to:
A. Teach electrical engineering theory
B. Provide minimum requirements for safe electrical installations
C. Replace manufacturer instructions
D. Set utility rates
Explanation: The NEC establishes minimum safety standards for electrical
installations to protect people and property.
,3. A journeyman electrician working on distribution systems must understand:
A. Only residential wiring
B. Plumbing systems
C. Electrical theory, safety practices, and distribution equipment
D. Building painting requirements
Explanation: Distribution journeymen work with high-voltage equipment and must
understand electrical systems, safety, and equipment operation.
4. Voltage is measured in:
A. Amperes
B. Volts
C. Ohms
D. Watts
Explanation: Voltage is the electrical potential difference that pushes current
through a circuit.
5. Electrical current is measured in:
, A. Volts
B. Ohms
C. Amperes
D. Watts
Explanation: Amperes measure the flow of electrical charge through a conductor.
6. Resistance is measured in:
A. Watts
B. Volts
C. Ohms
D. Amperes
Explanation: Ohms measure opposition to current flow in an electrical circuit.
7. Ohm’s Law states:
A. P = I × R
B. V = I × R
A. Generate electricity at the customer location
B. Deliver electrical power safely from substations to customers
C. Eliminate the need for transformers
D. Increase conductor resistance
Explanation: Distribution systems deliver electrical energy from substations
through feeders and transformers to homes, businesses, and other electrical loads.
2. The National Electrical Code (NEC) is primarily intended to:
A. Teach electrical engineering theory
B. Provide minimum requirements for safe electrical installations
C. Replace manufacturer instructions
D. Set utility rates
Explanation: The NEC establishes minimum safety standards for electrical
installations to protect people and property.
,3. A journeyman electrician working on distribution systems must understand:
A. Only residential wiring
B. Plumbing systems
C. Electrical theory, safety practices, and distribution equipment
D. Building painting requirements
Explanation: Distribution journeymen work with high-voltage equipment and must
understand electrical systems, safety, and equipment operation.
4. Voltage is measured in:
A. Amperes
B. Volts
C. Ohms
D. Watts
Explanation: Voltage is the electrical potential difference that pushes current
through a circuit.
5. Electrical current is measured in:
, A. Volts
B. Ohms
C. Amperes
D. Watts
Explanation: Amperes measure the flow of electrical charge through a conductor.
6. Resistance is measured in:
A. Watts
B. Volts
C. Ohms
D. Amperes
Explanation: Ohms measure opposition to current flow in an electrical circuit.
7. Ohm’s Law states:
A. P = I × R
B. V = I × R
