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The function of the piston compression rings used in a diese

题目
单选题
The function of the piston compression rings used in a diesel engine is to （）
A

seal the space between the piston and liner

B

transmit heat from the piston to the cylinder liner

C

reduce the amount of combustion gas blow-by

D

all of the above

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

单选题
If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）
A

The oil control rings will seal improperly and wear rapidly

B

The piston will overheat due to insufficient lubrication

C

Excessive oil will remain on the cylinder wall

D

Light brown smoke will emanate from the engine exhaust


正确答案： B
解析： 暂无解析

第2题：

单选题
What is a function of the wearing rings used in most centrifugal pumps?（）
A

Absorb erosion of high velocity discharge stream

B

Seal pump shaft against entry of air

C

Isolate the discharge side from the suction side

D

Dampen the turbulent discharge flow


正确答案： C
解析： 暂无解析

第3题：

Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?

A.Control the amount of lube oil burned in the combustion chamber

B.Transmit heat from the piston to the cylinder liner

C.Prevent damage to ring groove inserts by acting as a heat dam

D.Dissipate combustion chamber gas pressure by channeling it through the ring gap


正确答案：B

第4题：

单选题
What is commonly used to create turbulence in a diesel engine combustion system?（）
A

Shape of the piston crowns

B

Increasing the compression ratios

C

Increasing the piston crowns

D

Increasing the turbocharger gear ratio


正确答案： A
解析： 暂无解析

第5题：

单选题
Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits may cause （）.
A

low compression pressure

B

increased piston wear

C

increased cylinder lube oil consumption

D

poor contact between compression rings and liner


正确答案： B
解析： 暂无解析

第6题：

单选题
To function properly, oil control rings used on a diesel engine piston must distribute sufficient oil to all parts of the cylinder wall and must also（）.
A

prevent any lubricant from reaching

B

prevent excessive lubrication from reaching the combustion space

C

Provide metal-to-metal contact to seal the cylinder against blow-by

D

assure a positive means of scraping carbon accumulation from the cylinder


正确答案： C
解析： 暂无解析

第7题：

单选题
In order to keep excess oil from the intake ports in two-stroke/cycle diesel engines, （）
A

wide compression rings are used

B

oil rings are located above the piston

C

chromium plating is used on all piston rings

D

oil rings are located near the bottom of the piston skirt


正确答案： C
解析： 暂无解析

第8题：

If a used lube oil analysis indicates excessive chromate content, this means

A.air filtration is inadequate

B.engine coolant is leaking into the lube oil

C.fuel oil is leaking into the lube oil

D.the piston rings are excessive worn


正确答案：B

第9题：

单选题
Visual inspection of chrome-plated piston compression rings reveals a black ring face at the position of the cylinder liner portsThis condition indicates a ring which（）
A

has a crown-face

B

exceeds wear limits through normal wear

C

has excessive blow-by

D

is in good condition


正确答案： D
解析： 暂无解析

第10题：

单选题
Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）
A

Control the amount of lube oil burned in the combustion chamber

B

Transmit heat from the piston to the cylinder liner

C

Prevent damage to ring groove inserts by acting as a heat dam

D

Dissipate combustion chamber gas pressure by channeling it through the ring gap


正确答案： D
解析： 暂无解析

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