单项选择题X 纠错
A.has little or no internal friction
B.has a lower effective compression ratio
C.operates with scavenge air under a positive pressure
D.operates without energy absorbing intake and exhaust strokes
你可能喜欢
单项选择题
A.Decreased connecting rod bearing clearance
B.Increased connecting rod bearing clearance
C.Decreased compression ratio
D.Increased compression ratio
单项选择题
A.less fuel will enter the cylinder
B.higher the cylinder combustion temperature
C.more complete the fuel combustion
D.more rapid the rise in combustion pressure
单项选择题
A.dust entering the high pressure stage
B.lube oil carbonization
C.discharge pulsations
D.inter-stage vapor lock
单项选择题
A.increased compression ratio
B.decreased compression ratio
C.increased bearing clearance
D.decreased bearing clearance
单项选择题
A.The cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbon
B.The higher the cetane number, the shorter the ignition lag
C.The highest cetane number of fuel is 100
D.All of the above
单项选择题
A.The cetane number affects the amount of injection lag
B.The cetane number is an indication of the fuels viscosity
C.Ignition lag is reduced with fuels having a high cetane number
D.The cetane number is of little significance in the combustion process
单项选择题
A.improved cold weather starting
B.excessive fuel oil consumption
C.reduced ignition lag
D.smoother engine operation
单项选择题
A.indicates the amount of abrasive material in the fuel
B.affects the starting ability of a cold engine
C.determines the amount of fuel penetration engine
D.affects the compression ratio of an operating engine
单项选择题
A.dial indicator
B.outside caliper
C.bridge gauge
D.tram rod
单项选择题
A.telescoping
B.ring ‘snap’ gauge
C.inside vernier caliper
D.outside micrometer