A.that
B.which
C.who
D.these
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A.Make periodic inspections of bilges
B.Keep the barge under constant surveillance
C.Have a properly certificated tankerman or at least one licensed officer on board the towing vessel
D.Verify ullage readings
A.above the floor plates of the bilges
B.above the carburetor level
C.at the lowest point of the bilge areas
D.at no particular level
A.to the top to expel all vapors from the tanks
B.to the top so the operator is certain how much fuel he has aboard
C.with only sufficient fuel for the planned trip so excess gasoline is not carried
D.to near the top with some space allowed for gasoline expansion
A.settle near the bottom of the bilge
B.settle near the top of the bilge
C.settle evenly throughout all levels of the bilge by mixing with air
D.disperse to atmosphere
A.nitrogen
B.oxygen
C.carbon dioxide
D.water vapor
最新試題
The weight of liquefied petroleum gas vapors as compared to air is（）.
Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.
The tops of vents from gasoline tanks should terminate（）.
The primary hazard of liquefied petroleum gas and liquefied natural gas is（）.
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called（）.
The amount of LFG that may be loaded into a given tank is determined by（）.
What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure（）.
What is used to test a tank for oxygen content?（）