REPFF Exit Exam • Set 1 Question 5 of 30

What do the words ‘spontaneously combustion’ mean

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Direct Answer

Option D: the substance can catch fire by itself without an external source of heat or ignition

Spontaneous combustion occurs when a substance undergoes self-heating via slow oxidation without an external ignition source until reaching its autoignition temperature, creating severe shipboard fire hazards in materials like oily rags or certain bulk cargoes.

All Options

The substance is very difficult to set alight, even when it is very hot

when this substance burns it burns completely and does not leave any residue or ash

when the substance burns it becomes very hot

the substance can catch fire by itself without an external source of heat or ignition (Correct Answer)

Detailed Explanation & Context

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

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