單項(xiàng)選擇題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


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題If the compression ratio is increased on any diesel engine, （）

A.the expansion ratio will decrease
B.combustion will be slowed down
C.thermal efficiency will decrease
D.thermal efficiency will increase

4.單項(xiàng)選擇題If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）

A.changed
B.centrifuged
C.filtered
D.settled

5.單項(xiàng)選擇題How are the pressure and temperature affected in a diesel engine cylinder during compression?（）

A.Pressure and temperature decrease
B.Pressure and temperature increase
C.Pressure decreases and temperature increases
D.Pressure increases and temperature decreases