AK Electrical Administrator – Linework
Exam Practice Questions And Correct
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Rationales 2027 Q&A | Instant
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1. What is the primary purpose of a utility pole grounding electrode
system?
A. To increase conductor ampacity
B. To provide a path for fault and lightning currents to earth
C. To reduce conductor resistance
D. To increase transformer voltage
Answer: B. To provide a path for fault and lightning currents to earth
Rationale: A grounding electrode system provides a connection to earth for
lightning, surge, and fault-current dissipation and helps maintain electrical
system stability.
, 2. Which conductor is generally used to carry current from a distribution
transformer to a service or utilization point?
A. Guy wire
B. Neutral support
C. Secondary conductor
D. Messenger only
Answer: C. Secondary conductor
Rationale: Secondary conductors carry the transformer secondary voltage
to the customer's service or other utilization equipment.
3. What is the main function of a transformer on an overhead
distribution line?
A. To increase conductor sag
B. To change voltage levels
C. To eliminate grounding
D. To increase frequency
Answer: B. To change voltage levels
Rationale: Transformers transfer electrical energy between circuits while
changing voltage and current levels according to their turns ratio.
, 4. Which device is commonly installed on distribution lines to interrupt
fault current automatically and restore service after a temporary
fault?
A. Recloser
B. Capacitor
C. Disconnect blade
D. Current transformer
Answer: A. Recloser
Rationale: Automatic reclosers open during faults and can close again after
a predetermined interval, restoring service when the fault was temporary.
5. What is the purpose of a line fuse?
A. Regulate frequency
B. Provide overcurrent protection
C. Increase voltage
D. Measure power factor
Answer: B. Provide overcurrent protection
Rationale: A fuse opens its circuit when excessive current causes its fusible
element to melt, protecting conductors and equipment.
, 6. Which condition generally causes the greatest risk of an overhead
conductor contacting another object?
A. Excessive conductor sag
B. Low conductor temperature
C. Increased insulation thickness
D. Reduced wind
Answer: A. Excessive conductor sag
Rationale: Excessive sag can reduce clearance between conductors,
structures, vegetation, vehicles, and buildings.
7. What is conductor sag?
A. The electrical resistance of a conductor
B. The vertical distance a conductor falls between its supports
C. The conductor's diameter
D. The conductor's operating voltage
Answer: B. The vertical distance a conductor falls between its supports
Rationale: Sag is the vertical displacement of a conductor between
supporting points and changes with temperature, loading, span length,
and conductor characteristics.
8. Why must conductor tension be controlled during stringing?
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
1. What is the primary purpose of a utility pole grounding electrode
system?
A. To increase conductor ampacity
B. To provide a path for fault and lightning currents to earth
C. To reduce conductor resistance
D. To increase transformer voltage
Answer: B. To provide a path for fault and lightning currents to earth
Rationale: A grounding electrode system provides a connection to earth for
lightning, surge, and fault-current dissipation and helps maintain electrical
system stability.
, 2. Which conductor is generally used to carry current from a distribution
transformer to a service or utilization point?
A. Guy wire
B. Neutral support
C. Secondary conductor
D. Messenger only
Answer: C. Secondary conductor
Rationale: Secondary conductors carry the transformer secondary voltage
to the customer's service or other utilization equipment.
3. What is the main function of a transformer on an overhead
distribution line?
A. To increase conductor sag
B. To change voltage levels
C. To eliminate grounding
D. To increase frequency
Answer: B. To change voltage levels
Rationale: Transformers transfer electrical energy between circuits while
changing voltage and current levels according to their turns ratio.
, 4. Which device is commonly installed on distribution lines to interrupt
fault current automatically and restore service after a temporary
fault?
A. Recloser
B. Capacitor
C. Disconnect blade
D. Current transformer
Answer: A. Recloser
Rationale: Automatic reclosers open during faults and can close again after
a predetermined interval, restoring service when the fault was temporary.
5. What is the purpose of a line fuse?
A. Regulate frequency
B. Provide overcurrent protection
C. Increase voltage
D. Measure power factor
Answer: B. Provide overcurrent protection
Rationale: A fuse opens its circuit when excessive current causes its fusible
element to melt, protecting conductors and equipment.
, 6. Which condition generally causes the greatest risk of an overhead
conductor contacting another object?
A. Excessive conductor sag
B. Low conductor temperature
C. Increased insulation thickness
D. Reduced wind
Answer: A. Excessive conductor sag
Rationale: Excessive sag can reduce clearance between conductors,
structures, vegetation, vehicles, and buildings.
7. What is conductor sag?
A. The electrical resistance of a conductor
B. The vertical distance a conductor falls between its supports
C. The conductor's diameter
D. The conductor's operating voltage
Answer: B. The vertical distance a conductor falls between its supports
Rationale: Sag is the vertical displacement of a conductor between
supporting points and changes with temperature, loading, span length,
and conductor characteristics.
8. Why must conductor tension be controlled during stringing?
