单项选择题
A.seal the space between the piston and liner B.transmit heat from the piston to the cylinder liner C.reduce the amount of combustion gas blow-by D.all of the above
What determines the number of events occurring in a cyc...
单项选择题What determines the number of events occurring in a cycle of operation in an internal combustion engine?（）
A.Crankshaft revolution B.Type of engine (diesel or gasoline) C.Distance a piston travels during a stroke D.Number of pistons
Which of the factors listed has the greatest effect on ...
单项选择题Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?（）
A.temperature of the intake air B.friction within the engine C.mechanical condition of the supercharger D.mechanical condition of the turbocharger
A practical way of checking for excessive fuel injectio...
单项选择题A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）
A.feel the high pressure fuel line B.check the cylinder exhausts for white smoke frequently C.check the cylinder exhaust temperature D.isolate each cylinder and inspect the injector
