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QID - 25576

You are on a tankship designed to carry molten sulfur. Which statement is TRUE?

Cargo temperature may be taken by portable thermometers. 
            
There must be two portable toxic vapor detectors on board. 
            
The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them. 
            
The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume. 
            

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