单项选择题
A.an isochronous governor B.elastic engine mounts C.a vibration damper D.a cast iron bed plate with good flexible qualities
The air supplied to a diesel engine is compressed to （）...
The air supplied to a diesel engine is compressed to （） (1) provide heat for the ignition of the fuel (2) decrease injection delay
A.(1) only is correct B.(2) only is correct C.both (1) and (2) are correct D.neither (1) or (2) are correct
In a normally operating diesel engine, the main cause o...
单项选择题In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.
A.metal particles loosened by wear B.air when no air cleaners are used C.condensation of water vapors D.breakdown of the lubricating oil by dilution
The amount of fuel injected in a particular time, or de...
单项选择题The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed （）.
A.metering B.timing C.rate of injection D.rate of distribution
