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单选题Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）A low exhaust temperatureB low firing pressureC fuel knock in each cylinderD mechanical knock in each cylinder

题目
单选题
Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）
A

low exhaust temperature

B

low firing pressure

C

fuel knock in each cylinder

D

mechanical knock in each cylinder

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

单选题
When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）
A

quantity of fuel injected is decreased

B

quantity of fuel injected will always be increased

C

start of injection is advanced

D

duration of injection will always be greater


正确答案： C
解析： 暂无解析

第2题：

单选题
The burning of fuel oil in a diesel engine having a high sodium content, will cause （）
A

corrosion and grooving of exhaust valves

B

corrosion and gumming of the fuel injection pump

C

salt deposits in the exhaust manifold

D

slag deposits in the fuel injection equipment


正确答案： A
解析： 暂无解析

第3题：

A smoking exhaust from an operating diesel engine could be caused by( ).

A.low sulfur content in the fuel

B.a loose injector inlet connection

C.late fuel injection

D.high injection pressure


正确答案：C
解析：sulfur/sulphur：硫;content：内容，含量
译文：运行中的柴油机冒黑烟，可能的原因是燃油喷射滞后。

第4题：

单选题
When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）
A

Quantity of fuel injected tends to be decreased

B

Quantity of fuel injected will always be increased

C

Start of injection tends to be advanced

D

Duration of injection will always greater


正确答案： A
解析： 暂无解析

第5题：

单选题
The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is（）.
A

caused by retarded injection timing

B

caused by a mechanical defect in one cylinder

C

caused by high fuel injection pressures

D

normal for these conditions


正确答案： B
解析： 暂无解析

第6题：

单选题
In a four-stroke cycle diesel engine the intake valves open （）
A

before TDC and close after BDC

B

after TDC and close after BDC

C

before TDC and close before BDC

D

after TDC and close before BDC


正确答案： A
解析： 暂无解析

第7题：

单选题
Problems with the diesel engine fuel injection pump are usually caused by（）
A

improper adjustment

B

contaminated fuel

C

kinked fuel lines

D

excessive engine vibration


正确答案： C
解析： 暂无解析

第8题：

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.

A.low firing pressure

B.low exhaust temperature

C.mechanical knock in each cylinder

D.fuel knock in each cylinder


正确答案：A

第9题：

单选题
If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）
A

excessively late injection timing for each cylinder

B

incorrectly adjusted intake valve timing

C

incorrectly adjusted fuel injector

D

incorrectly adjusted intake valve clearance


正确答案： A
解析： 暂无解析

第10题：

单选题
In an operating diesel engine, pre-ignition can be caused by （）
A

excessively late fuel injection

B

oil in the air charge

C

water in the fuel

D

injection continuing after the fuel charge is ignited


正确答案： C
解析： 暂无解析

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