LGTCO/LGTF Exit Exam • Set 3 Question 20 of 30

What is the vapour relative density of n-Butane? (Air = 1)

✓

Direct Answer

Option B: 2.09

Normal butane vapor has a relative density of approximately 2.09 (Air = 1), which is more than twice as heavy as air.

All Options

0.90

2.09 (Correct Answer)

2.60

1.70

Detailed Explanation & Context

Normal butane vapor has a relative density of approximately 2.09 (Air = 1), which is more than twice as heavy as air.

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

Practice Full LGTCO/LGTF Set 3

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in LGTCO/LGTF Set 3

View All 30 →

Q1 Liquefied gas tankers are categorized as per the cargoes carried, as follows: Q2 There are three types of gas tankers according to the carriage condition, such as: Q3 The cargo area of a gas tanker which is not equipped in an approved manner to ensure that its atmosphere is at all times maintained in a safe manner is a: Q4 A space other than a gas-dangerous space is known as: Q5 Air intakes for accommodation and engine-room have to be at a minimum safe distance from ventilation outlets from: Q6 Can hot work in dangerous and hazardous areas be carried out during cargo, tank cleaning, gas freeing, purging or inerting operations? Q7 Access from a gas-dangerous zone on the open weather deck to a gas-safe space is arranged through: Q8 Airlock doors should be self-closing and must not have hooks or hold-open devices. There should be a minimum distance of at least _____ between both doors. Q9 An audible and visual alarm system gives a warning on both sides of the airlock when: Q10 The gas-safe and airlock spaces within the cargo area have: