RAFF Exit Exam • Set 1 Question 19 of 30

Fire alarm system work on ______-

✓

Direct Answer

Option B: 24 volt DC

Fire alarm systems typically operate on 24-volt DC power. This low voltage is chosen for safety, minimizing electrical shock hazards while ensuring reliable operation, as is standard practice and often specified in shipboard electrical system design.

All Options

A

12 volt DC

B

24 volt DC (Correct Answer)

C

24 volt AC

D

220 volt DC

Detailed Explanation & Context

Fire alarm systems typically operate on 24-volt DC power. This low voltage is chosen for safety, minimizing electrical shock hazards while ensuring reliable operation, as is standard practice and often specified in shipboard electrical system design.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Refresher Advanced Fire Fighting (RAFF).

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