Tankers carrying cryogenic cargoes, such as LNG, are fitted with gas detector systems alarmed at 30% of the lower explosive limit. If the gas detector alarm sounds, this means __________.

Question

Accepted Answer

a flammable vapor concentration exists at the sample point, but it is too lean to burn

Answer

an explosion is about to take place

Answer

the detector sensor is sampling a space where the cargo vapor concentration is 30 percent by volume

Answer

the detector is sampling a space in which 30 percent of the atmosphere is explosive

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