A.as it warms up it becomes heavier than air
B.the way it reacts with sea water
C.the strong odor it produces
D.its low temperature causes frostbite or freezing
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A.It increases its volume
B.It reduces its volume
C.It has less product per volume
D.None of the above
A.exclusion of all sand and solid matter
B.cleaning with clean fresh or sea water
C.examination for fractures and pitting
D.All of the above
A.that
B.which
C.who
D.these
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
最新試題
Where should the tops of vents from gasoline tanks terminate?（）.
One of the principal dangers inherent in liquefied petroleum gas is（）.
Combustible gas indicators operate by drawing an air sample into the instrument（）.
The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.
Gasoline vapor tends to collect（）.
What is used to test a tank for oxygen content?（）
The weight of liquefied petroleum gas vapors as compared to air is（）.
Which is NOT a safety precaution to be observed during the loading of LFG?（）
What normally helps in detecting escaping gas? （）
The tops of vents from gasoline tanks should terminate（）.