海船船员考试

单选题In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wallA Ⅰ onlyB Ⅱ onlyC either Ⅰ or ⅡD neither Ⅰ or Ⅱ

题目
单选题
In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wall
A

Ⅰ only

B

Ⅱ only

C

either Ⅰ or Ⅱ

D

neither Ⅰ or Ⅱ

如果没有搜索结果，请直接 联系老师 获取答案。
如果没有搜索结果，请直接 联系老师 获取答案。
相似问题和答案

第1题：

On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the______.

A.accumulator spring compression

B.balance piston

C.compensating(补偿) needle valve

D.proportional piston


正确答案：C

第2题：

单选题
A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A

engine overload

B

leaky valves

C

stuck or broken piston rings

D

low air injection pressure


正确答案： A
解析： 暂无解析

第3题：

A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.

A.engine overload

B.leaky valves

C.stuck or broken piston rings

D.low air injection pressure


正确答案：A

第4题：

单选题
In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wall
A

Ⅰ only

B

Ⅱ only

C

either Ⅰ or Ⅱ

D

neither Ⅰ or Ⅱ


正确答案： D
解析： 暂无解析

第5题：

单选题
（） can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.
A

The medium speed 4-stroke trunk piston engine

B

The low speed 2-stroke crosshead engine

C

The medium speed 2-stroke crosshead engine

D

The low speed 4-stroke trunk piston engine


正确答案： A
解析： 暂无解析

第6题：

单选题
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
A

Speed limiting governor

B

Over-speed governor

C

Over-speed trip

D

Over-speed relay


正确答案： D
解析： 暂无解析

第7题：

单选题
Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.
A

excessive crankcase pressure

B

excessive lube oil temperature

C

contamination of the lube oil by water

D

contamination of the cooling water by lube oil


正确答案： C
解析： 暂无解析

第8题：

On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).

A.a spindle lubricator

B.an oil jet

C.internal splashing

D.drilled passages in the crankshaft


正确答案：D
解析：medium：中等，介质;pin：销，刺穿，钉住;journal：轴颈;spindle：芯轴，转轴;lubricator：注油器;splash：飞溅
译文：对于中速主推进柴油机，曲柄销轴承通过曲轴内钻孔的油道供油润滑。

第9题：

单选题
The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.
A

direct action of cam shaft

B

compressed air pressure

C

hydraulic “push rods”

D

direct action of the main piston moving down


正确答案： A
解析： 暂无解析

第10题：

单选题
Low compression of diesel engine may result from （）
A

a worn cylinder

B

broken piston rings

C

any of A and B

D

none of the above


正确答案： A
解析： 暂无解析

更多相关问题
相关内容