海船船员考试

单选题Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the （）.A intake strokeB exhaust strokeC power strokeD compression stroke

题目
单选题
Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the （）.
A

intake stroke

B

exhaust stroke

C

power stroke

D

compression stroke

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相似问题和答案

第1题：

单选题
The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in （）
A

clogged fuel injection pumps

B

increased cylinder liner wear

C

intake valve stem corrosion

D

varnish deposit on pistons


正确答案： C
解析： 暂无解析

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：

If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the

A.fuel line connections to the cylinder injection valves

B.gasket surfaces of the fuel oil filters

C.discharge fittings of the fuel injector pumps

D.suction side of the fuel oil transfer pump


正确答案：D

第4题：

单选题
Heat damage to fuel injection nozzles can be prevented by avoiding （）
A

excessive fuel oil temperature

B

long periods of engine overload

C

metallic contact between nozzles and cylinder heads

D

hard carbon deposit and varnish on the nozzles


正确答案： B
解析： 暂无解析

第5题：

单选题
If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）
A

Increase the cooling water flow to the engine

B

Secure or reduce fuel to that cylinder

C

Screw down on the pressure adjusting spring to decrease to decrease popping pressure

D

Readjust the injection timing


正确答案： A
解析： 暂无解析

第6题：

单选题
Fuel oil discharged to the diesel engine cylinder is atomized at the （）
A

turbocharger

B

injection nozzle tip

C

carburetor

D

fuel oil pump


正确答案： B
解析： 暂无解析

第7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
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
Diesel engine fuel oil contamination often results in （）
A

governor malfunctions

B

fuel injection system malfunctions

C

high cylinder lube oil temperatures

D

low intake temperatures


正确答案： C
解析： 暂无解析

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