Question 1
A current transformer (CT) is rated 600:5 A. If the primary current is 480 A, what is the secondary current?
Correct Answer:
4.0 A
Question 2
Which CT accuracy class is typically REQUIRED for protective relaying applications rather than revenue metering?
Correct Answer:
C100 or higher
Question 3
A megohmmeter reads 250 MΩ on a 480 V motor winding at 40°C. Per IEEE 43, the recommended MINIMUM insulation resistance for this machine (rated voltage + 1 kV at 40°C) is approximately:
Correct Answer:
1 MΩ
Question 4
A polarization index (PI) test on motor insulation gives a 1-minute reading of 200 MΩ and a 10-minute reading of 800 MΩ. The PI is:
Correct Answer:
4.0
Question 5
A potential transformer (PT) is rated 7200:120 V. If the primary voltage is 6900 V, what is the secondary voltage?
Correct Answer:
115 V
Question 1
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About this Exam

Prepare with the PE Electrical Power Practice Questions - PE Electrical and Computer Power Exam practice quiz. This question bank includes 100 questions covering current, three-phase, approximately, load, and motor. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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PE Electrical Power Practice Questions - PE Electrical and Computer Power Exam

This practice set contains 100 questions from the matching question bank and focuses on current, three-phase, approximately, load, and motor. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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