海船船员考试

单选题If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）A too lowB a little lowerC a little higherD exactly the same

题目
单选题
If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）
A

too low

B

a little lower

C

a little higher

D

exactly the same

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相似问题和答案

第1题：

While sailing in ballast under normal weather and sea condition, the basic parameter which is used to restrict the fuel injection of main engine is

A.the exhaust temperature

B.the speed of main engine

C.the turbine rotation speed

D.the power of main engine


正确答案：B

第2题：

单选题
If a cam-controlled engine has a normal injection pressure at rated speed,the injection pressure will be（）at slow speed.
A

a little lower

B

a little higher

C

too low

D

exactly the same


正确答案： C
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
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：

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7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8题：

If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the

A.cylinder compression pressure may not be high enough

B.cylinder compression temperature may be too high

C.fuel oil injection pressure may not be high enough

D.scavenge and purge process is incomplete


正确答案：A

第9题：

单选题
Excessive diesel engine back pressure may be an indication of （）
A

carbon buildup in the exhaust manifold

B

overcooling of the exhaust manifold

C

eroded muffler baffle plates

D

high injection pressure


正确答案： D
解析： 暂无解析

第10题：

单选题
When ship is fouled, increasing the fuel injection for keeping the normal speed will cause the main engine （）
A

to work as overload characteristic

B

overspeed

C

over mechanical load only

D

over thermal load only


正确答案： A
解析： 暂无解析

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