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【单选题】

On a diesel engine, fuel is delivered into the combustion space by （）.

A、a cooling system

B、a lubrication oil system

C、an electric system

D、an injection system

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更多“On a diesel engine, fuel is delivered into the combustion space by （）.”相关的问题
第1题
[单选题] （）, so they are widely used on board ship nowadays.

A、Diesel engines have more advantages in comparison with gasoline engines  B、Diesel engines have more advantages in comparison to gasoline engines  C、Gasoline engines have more advantages in comparison with diesel engines  D、Gasoline engines have more advantages in comparison to diesel engines  

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第2题
[单选题] （）are increasingly used as main engine on merchant vessels, because they have a high Hp/Weight ratio.

A、Slow speed diesel engines  B、Medium-speed diesel engines  C、Steam engines  D、Gasoline engines  

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第3题
[单选题] A Kort nozzle is a(n)（）.

A、hollow tube surrounding the propeller used to improve thrust  B、nozzle attached to a firefighting hose  C、intake valve on a diesel engine  D、piston cylinder on a diesel engine  

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第4题
[单选题] Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because（）.

A、The direction of pressure on the journal in four-stroke engine is continuously  B、positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine  C、four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines  D、Low-stroke engines usually consume less lube oil than four-stroke engines  

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第5题
[单选题] The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.

A、principle  B、principal  C、cause  D、case  

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第6题
[单选题] What is the effect of heated intake air on a diesel engine? （）

A、Increases efficiency  B、Increases engine horsepower  C、Increases engine life  D、Reduces engine horsepower  

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第7题
[] Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）

A、A.increasing the quantity of starting air  B、B.increasing the lube oil pressure  C、C.heating the engine fuel supply  D、D.heating the engine coolant  

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第8题
[单选题] The size of the exhaust valve opening is （）

A、most critical in a four-stroke cycle diesel engine  B、most critical in a two-stroke/cycle diesel engine  C、most critical in a four-stroke/cycle diesel engine if it is turbocharged  D、of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine  

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第9题
[单选题] （） the engines, the diesel engine is（） used engine on board.

A、Between；more commonly  B、Among；the most commonly  C、Between；not more commonly  D、Among；not the most commonly  

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第10题
[单选题] Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）

A、bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed  B、bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed  C、the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine  D、two-stoke/cycle diesel engines require more complicated lubrication piping  

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