海船船员考试

单选题Before a marine diesel engine is started the cylinders and pistons must be ().A cooled to appropriate temperatureB warmed up gradually to appropriate temperatureC opened up and renewedD ground and polished

题目
单选题
Before a marine diesel engine is started the cylinders and pistons must be ().
A

cooled to appropriate temperature

B

warmed up gradually to appropriate temperature

C

opened up and renewed

D

ground and polished

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相似问题和答案

第1题:

Diesel engines are started by supplying_____into the cylinders in the appropriate sequence for the required direction.

A.cooling water

B.compressing air

C.compressed air

D.cylinder oil


正确答案:C

第2题:

Cylinders of marine diesel engines are normally cooled by ___ .

A.sea water

B.fine mineral oil

C.sanitary water

D.fresh water


正确答案:D

第3题:

Diesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction.

A.cooling water

B.compressing air

C.compressed air

D.cylinder oil


正确答案:C

第4题:

单选题
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by()
A

natural aspiration

B

masked intake valves

C

air cells

D

scavenging air


正确答案: B
解析: 暂无解析

第5题:

单选题
To meet the market requirements, a marine diesel engine should not be of()
A

big size

B

fuel economy

C

low speed

D

high power


正确答案: D
解析: 暂无解析

第6题:

At least ___ cylinders in four--stroke engine will be configured to ensure that the engine can started with the crankshaft at whatever position.

A.6

B.2

C.12

D.8


正确答案:A

第7题:

单选题
A marine diesel engine is started by()
A

supplying high pressure oil into a hydraulic motor

B

supplying high temperature air into the cylinder

C

supplying high pressure air into the cylinder

D

electrical igniting


正确答案: C
解析: 暂无解析

第8题:

A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an

A.turbocharger malfunction or failure

B.crankcase exhauster overload

C.overload on the intercooler

D.obstruction in the engine cylinders


正确答案:A

第9题:

单选题
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


正确答案: D
解析: 暂无解析

第10题:

单选题
Turbocharging of marine diesel engine is achieved by two distinct methods, () termed the constant pressure and the pulse system.
A

respectable

B

respectful

C

respective

D

respectively


正确答案: D
解析: 暂无解析

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