Trunk-type diesel engine pistons are m

1、A diesel engine piston ring face is in

A diesel engine piston ring face is in direct contact with the （）.Atop of the ring grooveBcylinder liner oil filmCbottom of the ring grooveDback of the ring groove

2、In a four-cycle diesel engine piston b

In a four-cycle diesel engine piston blow-by can result in increased（）Acrankcase pressureBcompression pressureCscavenge pressureDexhaust manifold pressure

3、Trunk type diesel engine pistons are e

Trunk type diesel engine pistons are effectively cooled when heat is（）Aradiated through the engine blockBtransferred to water cooled cylinder wallsCconducted through the piston crownDtransferred to escaping exhaust gase

4、Diesel engines are started by supplyin

Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.Afuel oilBdiesel oilCcompressed airDjacket water

5、Diesel engines are considered safer th

Diesel engines are considered safer than gasoline engines because（）.Athey are more heavily builtBthe fuel used is less volatileCthey can be easily reversedDthey operate at a lower speed

6、In a trunk type diesel engine piston,

In a trunk type diesel engine piston, the thickness of the head or crown is determined by the（）Ⅰ.statically balancedⅡ.heat dissipation requirementAⅠ onlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰ nor Ⅱ