A.one-half engine speed
B.the same as engine speed
C.twice engine speed
D.four times engine speed
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A.air intake
B.a fuel outlet
C.cooling water inlets
D.exhausting combustion gas
A.poor cooling of cylinder walls
B.improper cooling of the piston
C.insufficient piston lubrication
D.all of the above
A.natural aspiration
B.masked intake valves
C.air cells
D.scavenging air
A.excessive lube oil consumption
B.lower than normal lube oil temperature
C.higher than normal exhaust back pressure
D.excessive crankshaft end play
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
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