單項(xiàng)選擇題A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is ()

A.one-half engine speed
B.the same as engine speed
C.twice engine speed
D.four times engine speed


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In the cylinder head of a two-stroke/cycle diesel engine, valves are used for()

A.air intake
B.a fuel outlet
C.cooling water inlets
D.exhausting combustion gas

2.單項(xiàng)選擇題Diesel engine piston seizure can be caused by ()

A.poor cooling of cylinder walls
B.improper cooling of the piston
C.insufficient piston lubrication
D.all of the above

3.單項(xiàng)選擇題Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by()

A.natural aspiration
B.masked intake valves
C.air cells
D.scavenging air

4.單項(xiàng)選擇題Improperly fitted piston rings in a diesel engine can cause()

A.excessive lube oil consumption
B.lower than normal lube oil temperature
C.higher than normal exhaust back pressure
D.excessive crankshaft end play

5.單項(xiàng)選擇題Cold clearances between the skirt of an aluminum piston and the cylinder liner is about ()

A.twice as large as with a cast iron piston
B.the same size as with a cast iron piston
C.half as large as with a cast iron piston
D.the same size as the crown of an aluminum piston