單項選擇題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


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1.單項選擇題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

2.單項選擇題A gas-free certificate would usually be issued by a (n)（）.

A.CCS marine surveyor
B.certified marine chemist
C.port engineer
D.HAS marine inspector

3.單項選擇題A half-height container is used（）.

A.to carry cargoes of low density
B.when stowage space is limited
C.to carry cargoes such as steel products or drums
D.to double the stowage capacity of the vessel

4.單項選擇題A heated bulkhead has the effect on a hygroscopic commodity of（）.

A.causing moisture to accumulate against bulkhead
B.lowering the vapor pressure of the commodity
C.lowering the dew point of the air
D.raising the vapor pressure of the commodity

5.單項選擇題A high cube container is designed specifically to（）.

A.carry low density cargoes
B.protect fragile cargoes
C.stow cargoes with concentrated weights such as machinery
D.carry cargoes of very low stowage factors