LGTCO/LGTF Exit Exam • Set 3 Question 22 of 30

What is the operation carried out prior to gassing up the tanks on liquefied gas carriers?

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Direct Answer

Option D: Inerting

Prior to introducing flammable cargo vapor (gassing up), cargo tanks containing air must be thoroughly inerted with inert gas or nitrogen to lower oxygen levels below flammable thresholds.

All Options

Gas freeing

Aerating

Cooling down

Inerting (Correct Answer)

Detailed Explanation & Context

Prior to introducing flammable cargo vapor (gassing up), cargo tanks containing air must be thoroughly inerted with inert gas or nitrogen to lower oxygen levels below flammable thresholds.

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

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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: