If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur?（）

A pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the load
B. An electromagnetic brake will hold the load where it is suspended
C. The load will fall rapidly to the deck unless the foot brake is engaged
D. The load will slowly lower to the deck under control of the drag of the winch motor

增压器发生故障后锁住转子的措施简便，起到了缓解故障和防止故障扩大的作用，但缺点是（）。

A. 破坏了与柴油机联合装置的工作
B. 需要具备短时停航的工作条件
C. 长时间锁住转子将引起变形
D. 废气继续通过使转子受到高温作用

With regards to a diesel engine crankcase explosion, the most violent is the（） (1) primary explosion (2) secondary explosion

A. (1) only
B. (2) only
C. both (1) and (2)
D. neither (1) or (2)

The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the （）

A. direction of air flow within the cylinder
B. sequence of port opening
C. method of opening exhaust ports
D. volume of air admitted to the cylinder

The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.

A. principle
B. principal
C. cause
D. case

在并联交流电路中，支路电流有可能（）总电流。

Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.

A. a exhaust valve
B. a piston skirt
C. a piston crown
D. an air suction valve

The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.

A. has begun
B. takes place
C. occurs
D. happe

Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to （）.

A. react with insufficient speed droop
B. fail to react to small speed changes
C. have excessive sensitivity to small speed changes
D. remain in the neutral positio

The lower end of each piston rod is reduced in diameter to fit a bore in the （）, this being secured to the piston rod by a nut.

A. piston gudgeon pin
B. piston skirt
C. cross-head
D. cross-head pi