單項選擇題Name one major advantage of transporting gas under refrigeration.（）

A.It increases its volume
B.It reduces its volume
C.It has less product per volume
D.None of the above


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1.單項選擇題LFG tank and pipeline maintenance should include（）.

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

3.單項選擇題If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）

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

4.單項選擇題Gasoline vapor tends to collect（）.

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

5.單項選擇題Gasoline tanks should be filled（）.

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