You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．A.There must be two portable toxic vapor detectors on boardB.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volumeC.Cargo temperature may be taken by portable thermometersD.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．
A.There must be two portable toxic vapor detectors on board
B.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume
C.Cargo temperature may be taken by portable thermometers
D.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
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