單項(xiàng)選擇題In a diesel engine, blow-by()

A.increase exhaust back pressure
B.causes excessive crankcase pressure
C.can only be detected by a compression check
D.decreases fuel consumption


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1.單項(xiàng)選擇題A diesel engine will lose power if fuel injection occurs too late in the cycle, because the()

A.fuel droplets will burn as they leave the fuel injector
B.fuel will not be properly atomized in the cylinder
C.maximum expansion of the burned fuel cannot take place in the cylinder
D.compression pressure will be too low to cause fuel ignition

2.單項(xiàng)選擇題Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or ()

A.inside micrometer
B.feeler gauge and straight edge
C.adjustable trammel
D.sighting device

3.單項(xiàng)選擇題Some diesel engines are supercharged with a ()

A.slam charger
B.turbocharger
C.fuel atomizer
D.fuel injector

4.單項(xiàng)選擇題Metal particles accumulated from the wearing of components in a diesel engine can result from lube oil that has been contaminated with().

A.abrasive particles
B.metallic oxides
C.corrosive acids
D.any or all of the above

5.單項(xiàng)選擇題In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with()

A.low firing pressure
B.low exhaust temperature
C.mechanical knock in each cylinder
D.fuel knock in each cylinder