LGTCO/LGTF Exit Exam • Set 3 Question 18 of 30

What is the vapour relative density of Methane? (Air = 1)

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Direct Answer

Option B: 0.554

At ambient temperature, methane vapor has a relative density of approximately 0.554 compared to air, meaning warm methane gas is lighter than air and rises rapidly.

All Options

1.058

0.554 (Correct Answer)

1.55

2.09

Detailed Explanation & Context

At ambient temperature, methane vapor has a relative density of approximately 0.554 compared to air, meaning warm methane gas is lighter than air and rises rapidly.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Liquefied Gas Tanker Cargo Operations (LGTCO/LGTF).

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