RAFF Exit Exam • Set 1 Question 4 of 30

When an oil fire has been extinguished the surface of the oil should be kept covered with foam to prevent

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Direct Answer

Option A: Air from contacting the oil vapours permitting re-ignition

After extinguishing an oil fire with foam, maintaining the foam blanket prevents re-ignition. The foam excludes oxygen, which is necessary for combustion, and also cools the surface, preventing the oil from reaching its auto-ignition temperature. (SOLAS II-2/FSS Code)

All Options

A

Air from contacting the oil vapours permitting re-ignition (Correct Answer)

B

Boiling of the heated oil

C

Spontaneous combustion below the surface

D

Toxic fumes from escaping to the surface

Detailed Explanation & Context

After extinguishing an oil fire with foam, maintaining the foam blanket prevents re-ignition. The foam excludes oxygen, which is necessary for combustion, and also cools the surface, preventing the oil from reaching its auto-ignition temperature. (SOLAS II-2/FSS Code)

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

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