Question 1
Under the Electricity Ordinance (Cap. 406), which voltage range is defined as low voltage (a.c. between conductors)?
Correct Answer:
Exceeding extra-low voltage but not exceeding 1000 V r.m.s. a.c.
Question 2
Under Cap. 406, extra-low voltage (ELV) a.c. normally does not exceed which value between conductors or between a conductor and earth?
Correct Answer:
50 V r.m.s. a.c.
Question 3
Grade C electrical work on a low-voltage fixed electrical installation covers which capacity limit?
Correct Answer:
Any current capacity
Question 4
Which installations are excluded from ordinary Grade C electrical work and require a separate Grade R category?
Correct Answer:
Neon-sign installation and unvented electric thermal-storage type water-heater installation
Question 5
A fixed electrical installation under Cap. 406 generally excludes which of the following?
Correct Answer:
An appliance supplied through a socket that can be disconnected without a tool
Question 1
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Prepare with the HK EMSD Grade C Electrical Worker Practice Questions - Examination for Registration as a Grade C Electrical Worker Exam practice quiz. This question bank includes 100 questions covering electrical, mainly, installation, circuit, and current. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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HK EMSD Grade C Electrical Worker Practice Questions - Examination for Registration as a Grade C Electrical Worker Exam

This practice set contains 100 questions from the matching question bank and focuses on electrical, mainly, installation, circuit, and current. 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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