RAFF Exit Exam • Set 3 Question 4 of 30

Spontaneous combustion is caused by ______

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Direct Answer

Option C: Chemical action with the substance

Spontaneous combustion originates from internal exothermic chemical reactions within a substance, such as oil-soaked rags undergoing slow oxidation, generating sufficient heat to reach its autoignition temperature without an external thermal source.

All Options

An outside heat source heating a substance until it ignites

Conduction of heat through a wall of material to the substance

Chemical action with the substance (Correct Answer)

All of the above

Detailed Explanation & Context

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

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Q1 A hand portable CO2 fire extinguisher is effectively in burning oil only ______ Q2 In cargo ships the diameter of fire main need to be sufficient for the discharge of _____ with two pumps simultaneously delivering through nozzles Q3 Foam extinguisher are checked by authorized shore persons every 5 years Q4 Spontaneous combustion is caused by ______ Q5 The maximum distance between centre to centre of heat detectors is 10 metre Q6 Which is the following is specially dedicated to receive shore supplied water ? Q7 The longer an oil fire is permitted to burn, the ______ Q8 Which of the following is not required to be part of vessel’s fire control plan? Q9 Sprinkler mainline is connected to the main sea water line Q10 A specific document which identifies a chemical, and a list its physical properties, health hazards, required controls, fire fighting procedures, cleanup methods, waste disposal and the safe handling is commonly called as _____