Question 1
A 37.5 kVA single-phase pole-mount transformer is fully loaded on a 240 V secondary. What is the approximate full-load secondary current?
Correct Answer:
156 A
Question 2
H1 and X1 markings on a distribution transformer identify which terminals?
Correct Answer:
The instantaneous-polarity ends of the primary and secondary windings
Question 3
Oil in a liquid-filled overhead distribution transformer is used primarily to:
Correct Answer:
Insulate the windings and transfer heat from the coils to the tank
Question 4
On a completely self-protected (CSP) overhead distribution transformer, the secondary overload device is typically:
Correct Answer:
A secondary breaker mounted inside the tank
Question 5
A 50 kVA single-phase transformer has a 7,620 V primary. What is the approximate full-load primary current?
Correct Answer:
6.6 A
Question 1 of 100
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About this Exam

Prepare with the SC Public Utilities Electrical Practice Questions - South Carolina Public Utilities - Electrical Contractor Examination Exam practice quiz. This question bank includes 100 questions covering transformer, overhead, line, power, and secondary. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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SC Public Utilities Electrical Practice Questions - South Carolina Public Utilities - Electrical Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on transformer, overhead, line, power, and secondary. 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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