1. What is the primary purpose of electrical plans?
,A. To determine employee wages
B. To communicate the intended electrical installation
C. To replace all code requirements
D. To eliminate inspections
Answer: B
Rationale: Electrical plans communicate the intended layout, equipment, circuits and
installation requirements.
2. Before beginning an electrical installation, the contractor should first review:
A. The weather forecast only
B. Plans, specifications and applicable requirements
C. Employee vacation schedules
D. Material invoices only
Answer: B
Rationale: Reviewing plans and specifications helps identify the scope, materials, equipment
and installation requirements.
3. What is the purpose of a one-line diagram?
A. Show every conductor physically
B. Provide a simplified representation of an electrical system
C. Calculate labor wages
D. Replace all construction drawings
Answer: B
Rationale: A one-line diagram simplifies the representation of electrical distribution equipment
and connections.
4. A load calculation is primarily used to determine:
A. Paint quantities
B. Required electrical capacity
C. Building height
D. Conduit color
,Answer: B
Rationale: Load calculations help determine the electrical demand and appropriate system
capacity.
5. What should be considered when selecting conductor size?
A. Load, allowable ampacity and installation conditions
B. Paint color
C. Building owner's favorite color
D. Conductor brand only
Answer: A
Rationale: Conductor selection depends on electrical load, ampacity requirements,
temperature, installation conditions and applicable code provisions.
6. A circuit carries 20 A continuously. Which principle is important when sizing the circuit?
A. Continuous-load requirements
B. Wall color
C. Door size
D. Roof pitch only
Answer: A
Rationale: Continuous loads require appropriate sizing according to applicable electrical
requirements.
7. What happens to voltage drop as conductor length increases, assuming other factors
remain constant?
A. It generally increases
B. It always becomes zero
C. It decreases automatically
D. It becomes unrelated to resistance
Answer: A
, Rationale: Longer conductors have greater resistance, resulting in greater voltage drop for a
given current.
8. What happens to conductor resistance when conductor length increases?
A. Resistance generally increases
B. Resistance becomes zero
C. Resistance always decreases
D. Resistance becomes independent of material
Answer: A
Rationale: Resistance is directly related to conductor length.
9. Which material is commonly used as an electrical conductor?
A. Copper
B. Glass
C. Rubber
D. Wood
Answer: A
Rationale: Copper has high electrical conductivity and is widely used for electrical conductors.
10. Why is aluminum sometimes used for electrical conductors?
A. It has useful conductivity with lower weight and cost considerations
B. It is an electrical insulator
C. It cannot carry current
D. It never expands with temperature
Answer: A
Rationale: Aluminum is a conductive material that can provide weight and economic
advantages in appropriate applications.
11. What does ampacity mean?
,A. To determine employee wages
B. To communicate the intended electrical installation
C. To replace all code requirements
D. To eliminate inspections
Answer: B
Rationale: Electrical plans communicate the intended layout, equipment, circuits and
installation requirements.
2. Before beginning an electrical installation, the contractor should first review:
A. The weather forecast only
B. Plans, specifications and applicable requirements
C. Employee vacation schedules
D. Material invoices only
Answer: B
Rationale: Reviewing plans and specifications helps identify the scope, materials, equipment
and installation requirements.
3. What is the purpose of a one-line diagram?
A. Show every conductor physically
B. Provide a simplified representation of an electrical system
C. Calculate labor wages
D. Replace all construction drawings
Answer: B
Rationale: A one-line diagram simplifies the representation of electrical distribution equipment
and connections.
4. A load calculation is primarily used to determine:
A. Paint quantities
B. Required electrical capacity
C. Building height
D. Conduit color
,Answer: B
Rationale: Load calculations help determine the electrical demand and appropriate system
capacity.
5. What should be considered when selecting conductor size?
A. Load, allowable ampacity and installation conditions
B. Paint color
C. Building owner's favorite color
D. Conductor brand only
Answer: A
Rationale: Conductor selection depends on electrical load, ampacity requirements,
temperature, installation conditions and applicable code provisions.
6. A circuit carries 20 A continuously. Which principle is important when sizing the circuit?
A. Continuous-load requirements
B. Wall color
C. Door size
D. Roof pitch only
Answer: A
Rationale: Continuous loads require appropriate sizing according to applicable electrical
requirements.
7. What happens to voltage drop as conductor length increases, assuming other factors
remain constant?
A. It generally increases
B. It always becomes zero
C. It decreases automatically
D. It becomes unrelated to resistance
Answer: A
, Rationale: Longer conductors have greater resistance, resulting in greater voltage drop for a
given current.
8. What happens to conductor resistance when conductor length increases?
A. Resistance generally increases
B. Resistance becomes zero
C. Resistance always decreases
D. Resistance becomes independent of material
Answer: A
Rationale: Resistance is directly related to conductor length.
9. Which material is commonly used as an electrical conductor?
A. Copper
B. Glass
C. Rubber
D. Wood
Answer: A
Rationale: Copper has high electrical conductivity and is widely used for electrical conductors.
10. Why is aluminum sometimes used for electrical conductors?
A. It has useful conductivity with lower weight and cost considerations
B. It is an electrical insulator
C. It cannot carry current
D. It never expands with temperature
Answer: A
Rationale: Aluminum is a conductive material that can provide weight and economic
advantages in appropriate applications.
11. What does ampacity mean?
