單項(xiàng)選擇題If the analysis of used lube oil indicates a high content of iron particles, this could indicate()

A.corrosive deterioration of a bearing
B.inadequate air filtration
C.excessive ring and liner wear
D.excessive cooling of lubricating oil


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Late fuel injection timing is indicated by ()

A.lower than normal cylinder pressure and low exhaust temperature
B.lower than normal cylinder pressure and high exhaust temperature
C.higher than normal cylinder pressure and low exhaust temperature
D.higher than normal cylinder pressure and high exhaust temperature

2.單項(xiàng)選擇題The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called().

A.engine displacement
B.super-aspirating
C.air injection
D.supercharging

3.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

4.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

5.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