CHEMCO Exit Exam • Set 8 Question 28 of 30

The "flammable limits" of an atmosphere are the

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Direct Answer

Option B: upper and lower percentage of vapor concentrations in an atmosphere which will burn if an ignition source is present

Flammable limits define the concentration range of a vapor in air (Lower Explosive Limit to Upper Explosive Limit) where ignition can occur if an ignition source is present, a fundamental concept in chemical safety.

All Options

two temperatures between which an atmosphere will self ignite

upper and lower percentage of vapor concentrations in an atmosphere which will burn if an ignition source is present (Correct Answer)

upper and lower pressures between which an atmosphere will not burn

two temperatures between which an atmosphere will burn if an ignition source is present

Detailed Explanation & Context

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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