In the combustion chamber, the part whose surface is exposed to the highest temperature is the （）.

[单选题]The crank chamber oil （）.A . can be recoveredB . is only supplied to cylindersC . only feeds the main bearingD . is a kind of detergent

[单选题]Place the plate in a chamber containing ammonia vapour.此句的意思是将层析板（ ）。A．置于密室中B．喷氨水溶液C．置于氨水溶液中D．置于含氨蒸气的密闭容器中E．以上都不对

[单选题]The （） chamber is enclosed between the cylinder head and piston.A . lubricationB . injectionC . coolingD . combustio

[单选题]Theoretical perfect combustion in a diesel engine yields by-products of_____.A．aldehydes and carbon dioxideB．water vapor and carbon monoxideC．nitrogen and carbon monoxideD．water vapor and carbon dioxide

[单选题]If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in _____.A．the crankcase explosionB．lifting of the cylinder safety valve

[单选题]Fuel is delivered into the combustion space by （）.A . a cooling systemB . a lubricating systemC . an electric systemD . an injection system

[单选题]If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in （）.A . the crankcase explosionB . lifting of the cylinder safety valv

[单选题]Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）A . AtomizationB . MeteringC . Effective strokeD . Penetratio

[单选题]Successful combustion inside the cylinders of a diesel engine is dependent upon （）.A . fine atomizationB . high temperatureC . good mixing of fuel and airD . all of the above

[单选题]Theoretical perfect combustion in a diesel engine yields by-products of （）.A . aldehydes and carbon dioxideB . water vapor and carbon monoxideC . nitrogen and carbon monoxideD . water vapor and carbon dioxide