Question 1345 Deck General

70% to pass

A portion of the cargo of an LNG carrier boils off during each voyage. How is the cargo boil off normally handled?

A Vented to the atmosphere.
B Mixed with nitrogen and re-circulated through the primary barrier.
C Burned in the boilers.
D Compressed, condensed, and return to the cargo tanks.
AI Explanation

The correct answer is C) Burned in the boilers. During the voyage of an LNG (Liquefied Natural Gas) carrier, a portion of the cargo boils off due to factors like heat ingress. This boil-off gas is normally burned in the ship's boilers to generate steam for propulsion and other onboard systems. Burning the boil-off gas is the standard practice as it allows the vessel to utilize the fuel value of the gas instead of venting it to the atmosphere. The other options, such as venting to the atmosphere (A) or mixing with nitrogen and recirculating (B), are not typical methods for handling LNG boil-off. Compressing and condensing the boil-off (D) would be an inefficient use of the gas compared to burning it in the boilers.

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