Question 924 Deck General

The correct answer is A) All boil-off vapor is normally burned in the boilers, and any excess steam generated is controlled by the "steam dump system". This is the correct answer because on LNG ships, the boil-off vapor from the cargo tanks is typically used as fuel in the ship's boilers to produce steam for propulsion and power generation. Any excess steam generated is then controlled and released through the "steam dump system" to maintain the proper pressure in the cargo tanks. The other options are incorrect because B) the "Thermo-regenerative saturation plant" is not used for controlling vapor pressure, C) venting excess vapor directly to the atmosphere is not a standard practice, and D) the high duty gas compressor is used for other purposes, not for returning vapor to the tanks.