單項選擇題The order “Bow thrust stop” means “()”.

A.Bow thrust full to pert
B.Bow thrust full to starboard
C.No bow thrust revolutions
D.No stern thrust revolutions


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1.單項選擇題“Movement of engine no longer required” means “()”.

A.Stop Engine
B.No Engine Revolutions
C.Stand-by Engine
D.Finished With Engine

2.單項選擇題The order “()” means “Maximum maneuvering engine revolution for ahead propulsion”.

A.Full Ahead
B.Half Ahead
C.Full Astern
D.Half Astern

3.單項選擇題The trim of a vessel is the ().

A.value of the mean draft
B.degree of list
C.amount of roll
D.difference in fore and aft drafts

4.單項選擇題The explosive range of a mixture of flammable vapors is specified as a percentage of ().

A.flammable vapor by volume in air
B.oxygen present to support combustion
C.the temperature of the flash point
D.the lower limit of explosibility of the mixture

5.單項選擇題What safety precautions should be observed by the crew while working around machinery in an engine room?()

A.They should wear safety shoes
B.They should wear ear protection
C.They should not wear jewelry
D.All of the above