单项选择题
A.grinding the spare plunger to the barrel B.replacing the plunger and the barrel C.highly polishing both the plunger and barrel D.replacing plunger only
Which of the following statements represents the functi...
单项选择题Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）
A.Control the amount of lube oil burned in the combustion chamber B.Transmit heat from the piston to the cylinder liner C.Prevent damage to ring groove inserts by acting as a heat dam D.Dissipate combustion chamber gas pressure by channeling it through the ring gap
Piston compression rings used in a diesel engine functi...
单项选择题Piston compression rings used in a diesel engine function to （）
A.transfer heat from the cylinder to the piston B.scrape oil from the sides of the piston C.seal the combustion space from the crankcases D.prevent any piston contact with the cylinder liner
An indicator card or pressure-volume diagram, shows gra...
单项选择题An indicator card or pressure-volume diagram, shows graphically the （）
A.compression ratio of the engine B.volume of the engine C.relationships between pressure and volume during one stroke of the engine D.relationships between pressure and volume during one cycle of the engine
