海船船员考试

单选题One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the （）A crankcaseB cylinder headC valve coverD engine frame

题目
单选题
One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the （）
A

crankcase

B

cylinder head

C

valve cover

D

engine frame

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相似问题和答案

第1题：

What best describes processing delay？（）

  • A、the time required from receipt of the incoming frame， until the frame/packet has been queued for transmission
  • B、the time taken for a single packet to traverse the physical medium from one end to the other
  • C、the time taken to place a frame on the physical medium for transport
  • D、the time spent for a packet to reside in the output queue of a router

正确答案:A

第2题：

单选题
Heat damage to fuel injection nozzles on small high-speed diesel engines, can be prevented by（）
A

employing fuel oil as a cooling medium

B

preventing hard carbon deposit on nozzle tips

C

avoiding fuel oil temperature exceeding builder’s specification

D

ensuring good metallic contact between nozzles and cylinder heads


正确答案： D
解析： 暂无解析

第3题：

One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?

A.Low loading of the cylinder

B.Excessive cooling of that piston

C.Sluggish ring action on the piston

D.A mechanical defect in a working part


正确答案：D

第4题：

单选题
Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?（）
A

Lubrication to the defective cylinder should be increased

B

Cooling water temperature to the engine should be increased

C

Only the turbocharger speed should be reduced

D

Engine speed should be reduced


正确答案： D
解析： 暂无解析

第5题：

单选题
One end of a diesel engine cylinder is sealed by the cylinder head and the other end by the （）
A

crankcase

B

piston

C

cylinder liner

D

crank cheek


正确答案： B
解析： 暂无解析

第6题：

单选题
Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?（）
A

Excessive cylinder liner

B

water in the fuel system

C

Cracked cylinder liner

D

Leaking lube oil cooler


正确答案： A
解析： 暂无解析

第7题：

单选题
Insufficient end clearance on newly fitted piston rings in a diesel enginewill cause the rings to（）
A

jam in the most worn part of the cylinder when the rings expand

B

break in the most worn part of the cylinder when the rings expand

C

wear eccentrically on the side opposite the end gap

D

overheat and jam at the top center on the combustion stroke


正确答案： A
解析： 暂无解析

第8题：

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.

A.using fuel oil with low cetane number

B.a badly worn piston pin

C.a loose flywheel key

D.a loose bed plate bolt


正确答案：B

第9题：

单选题
A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）
A

feel the high pressure fuel line

B

check the cylinder exhausts for white smoke frequently

C

check the cylinder exhaust temperature

D

isolate each cylinder and inspect the injector


正确答案： A
解析： 暂无解析

第10题：

单选题
A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A

a leaking fuel injection nozzle

B

a clogged air filter

C

early fuel injection

D

burned valves


正确答案： B
解析： 暂无解析

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