GASCO Exit Exam • Set 9 Question 4 of 30

Zone definitions does not include,

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Direct Answer

Option D: Zone 3: Area in which explosion can occur on a LNGF vessel

The correct answer is Zone 3: Area in which explosion can occur on a LNGF vessel. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

All Options

Zone 0: Area in which an explosive gas atmosphere is present continuously or is present for a long period.

Zone 1: Area in which an explosive gas atmosphere is likely to occur in normal operation.

Zone 2: Area in which an explosive gas atmosphere is not likely to occur in normal operation, and if it does occur is likely to do so only infrequently and will exit for a short period only.

Zone 3: Area in which explosion can occur on a LNGF vessel (Correct Answer)

Detailed Explanation & Context

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).

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More Questions in GASCO Set 9

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Q1 Fire fighters can control small LNG fire by using____________. Q2 If the concentration of the fuel is greater than 15%, LNG vapors cannot burn because of inadequate_________________. Q3 The best way to discover a fire in its early stages, Q4 Smoke detectors are classified into the following: Q5 A soda acid type- water extinguisher is used to fight class ____________-fires, Q6 Both stationary and hand-held equipment should have an extension that is at least ____________. Q7 Which type of detectors uses bimetallic strips to detect a fire? Q8 Where do the cargo manifold relief lines, the cargo machinery space relief lines and cargo tanks relief lines lead to? Q9 Onboard an LNG tanker, for both main and forcing steam vaporizers it is important to note the output capacity (the amount of LNG liquid turned into LNG vapor). What does this capacity depend on? Q10 Relief valves are used on an LNG carrier liquid header. Identify the correct combination of "set pressure" (lifting pressure) and "reseating pressure" for these valves.