Which of the following actions should be taken by the engine room watch when the general a

离心泵旁通回流阀关小后，泵的________。

A.流量减小，功率增大

B.与A相反

C.流量减小，功率降低

D.与C相反

在气缸直径与最高气体爆炸压力一定的条件下，采用十字头式柴油机的最大优点是（）。

A.减少气体力的合力

B.使十字头销的直径不受气缸直径的限制

C.增大气体力的合力

D.使十字头销的直径受到气缸直径的限制

made across the Atlantic Ocean.

A.spends/in

B.spent/on

C.has spent/on

D.had spent/in

在值班轮机员接到"紧急刹车"指令时，首先采取的操作是（）。

A.回车钟

B.停油

C.换向

D.刹车

泵铭牌上标注的流量通常是指_______。

A.单位时间内排送液体的重量

B.单位时间内排送液体的质量

C.单位时间内排送液体的体积

D.泵轴每转排送液体的体积

native for another.

A.interlocked

B.interconnected

C.interfered

D.interacted

The _____ can tell us how much heat we can get from the burning of an oil.

A.viscosity

B.flash point

C.cetane number

D.calorific value

____ the cylinder walls, the heat passes through them by conduction.

A.When receiving by

B.When received by

C.In order to receiving

D.In order to receive

le 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

Before doing maintenance on electrical equipment, you should ____.

A.turn off power first

B.turn on power first

C.with a test pen in hand

D.tell C/E