单项选择题
Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）
A.a combination of constant volume and constant pressure
B.a combination of constant temperature and constant pressure
C.entirely constant pressure
D.entirely constant volume
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相关考题
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单项选择题
The function of the piston compression rings used in a diesel engine is to （）
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 -
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 -
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
