RAFF Exit Exam • Set 4 Question 2 of 30

Why is carbon dioxide better than dry chemical for fire fighting a class ‘C’ (electrical fire)?

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Direct Answer

Option B: Dry chemical leaves residue

Carbon dioxide is a clean extinguishing agent that leaves zero residue, protecting sensitive electrical switchboards and equipment from secondary damage. Conversely, Dry Chemical Powder leaves corrosive, abrasive deposits that permanently ruin delicate electronic components and contacts.

All Options

A

The dry chemical is a conductor

B

Dry chemical leaves residue (Correct Answer)

C

CO2 will not dissipate in the air

D

It take small amount of CO2 to cover the same area

Detailed Explanation & Context

Carbon dioxide is a clean extinguishing agent that leaves zero residue, protecting sensitive electrical switchboards and equipment from secondary damage. Conversely, Dry Chemical Powder leaves corrosive, abrasive deposits that permanently ruin delicate electronic components and contacts.

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

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More Questions in RAFF Set 4

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