單項(xiàng)選擇題

A flooded lifeboat on board a vessel would adversely affect the vessel’s stabbility by（）.

A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG(center of gravity) off center

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單項(xiàng)選擇題

A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.

A.Batten down the engine room
B.start the fire pump
C.apply carbon dioxide to the fire
D.shut off the fuel supply

單項(xiàng)選擇題

A fuel-air mixture below the lower explosive limit is too（）.

A.rich to burn
B.lean to burn
C.cool to burn
D.dense to burn