(Piston area)X(Piston stroke)K(numbers

1、The function of the piston compression

The function of the piston compression rings used in a diesel engine is to （）Aseal the space between the piston and linerBtransmit heat from the piston to the cylinder linerCreduce the amount of combustion gas blow-byDall of the above

2、Which term describes piston pins havin

Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）AStationaryBFull floatingCSemi-floatingDFree rolling

3、If clearance between a piston and the

If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）Aalternation of side ...

4、（） is sometimes used for piston coolin

（） is sometimes used for piston cooling since leaks into the crankcase would not cause problems.ADiesel oilBHydraulic oilCLube oilDMineral oil

5、Broken piston rings manifest themselve

Broken piston rings manifest themselves during the scavenge port inspection by（）ALack of elastic tension, when the rings are pressed into the groove by means of a stickBBlackish appearanceCFractured rings and missing ringsDall off the above

6、The piston rings are manufactured with

The piston rings are manufactured with a diameter （） the bore of the cylinder.Alarger thanBsmaller thanCequal toDnone of the above