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Early fuel injection timing is indicated by the cylinder pre

题目
单选题
Early fuel injection timing is indicated by the cylinder pressure being（）
A

above normal with a below normal exhaust temperature

B

above normal with a normal exhaust temperature

C

below normal with a normal exhaust temperature

D

below normal with an above normal exhaust temperature

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：

High cylinder firing pressure, accompanied by low exhaust temperature, can result from ___.

A.improper fuel rack positing

B.lengthy exhaust valve duration

C.extend operation at light load

D.excessively early injection timing


正确答案：D

第2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3题：

If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.

A.backfire through the air intakes

B.develop less power under load

C.have high firing pressures

D.lift its cylinder relief valves


正确答案：B

第4题：

单选题
On most diesel engines, the governor controls the output speed by （）.
A

controlling the amount of fuel injected into the cylinders

B

varying the speed of the turbocharger

C

adjusting the compression ratio

D

changing the timing of the fuel injection camshaft


正确答案： C
解析： 暂无解析

第5题：

单选题
Late fuel injection timing is indicated by （）
A

lower than normal cylinder pressure and low exhaust temperature

B

lower than normal cylinder pressure and high exhaust temperature

C

higher than normal cylinder pressure and low exhaust temperature

D

higher than normal cylinder pressure and high exhaust temperature


正确答案： B
解析： 暂无解析

第6题：

High firing pressures and low exhaust temperature in a diesel engine may resultfrom( ).

A.decreased piston to cylinder head clearance

B.increased exhaust system back pressure

C.early fuel injection timing

D.low scavenge air temperature


正确答案：C
解析：decrease：减少;clearance：间隙
译文：喷油定时过早会引起柴油机爆炸压力偏高、排温偏低。

第7题：

单选题
Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）
A

Improper fuel rack positioning

B

Lengthy opening of the exhaust valve

C

Excessively early injection timing

D

Extended light load operation


正确答案： C
解析： 暂无解析

第8题：

Because the timing of injection is crucial, _____ mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.

A.gears

B.rams

C.barrels

D.cams


正确答案：D

第9题：

单选题
Early injection timing is indicated by （）.
A

high exhaust temperature and low firing pressure

B

high exhaust temperature and high firing pressure

C

low exhaust temperature and low firing pressure

D

low exhaust temperature and high firing pressure


正确答案： C
解析： 暂无解析

第10题：

单选题
Fuels of different qualities may require advancing or retarding the injection timing, in addition to which if the injection timing is advanced when the engine is running at loads below the （）, then a saving in fuel can be achieved.
A

BHP

B

MCR

C

IHP

D

MEP


正确答案： C
解析： 暂无解析

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