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CHEMCO Exit Exam • Set 11 Question 19 of 30

Class A fires involve

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Direct Answer

Option A: Solid cellulosic materials such as wood, paper, clothing, etc.

Class A fires involve ordinary combustible materials that leave an ash, such as solid cellulosic materials like wood, paper, textiles, and plastics. These fires are typically extinguished by cooling with water, which reduces the temperature below the ignition point. This classification is standard in fire safety.

All Options

A
Solid cellulosic materials such as wood, paper, clothing, etc. (Correct Answer)
B
Vapour/air mixture over the surface of flammable liquids
C
Energised electrical equipment
D
Combustible materials such as magnesium, sodium, etc.

Detailed Explanation & Context

Class A fires involve ordinary combustible materials that leave an ash, such as solid cellulosic materials like wood, paper, textiles, and plastics. These fires are typically extinguished by cooling with water, which reduces the temperature below the ignition point. This classification is standard in fire safety.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).

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