單項(xiàng)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


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1.單項(xiàng)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

2.單項(xiàng)選擇題Gasoline fumes tend to().

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

5.單項(xiàng)選擇題Compared to the amount of concentrated foam liquid used,the amount of low expansion mechanical foam produced is().

A.97 times greater
B.94 times greater
C.10 times greater
D.2 times greater

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