单项选择题
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
A crankshaft whose center of gravity coincides with its...
单项选择题A crankshaft whose center of gravity coincides with its center line is said to be （）.
A.dynamically balanced B.statically balanced C.counter balanced D.resonantly balanced
When centrifuging heavy fuel oil, an important factor t...
When centrifuging heavy fuel oil, an important factor to consider is the （） (1) flow rate (2) viscosity of the fuel oil
A.(1) only is correct B.(2) only is correct C.both (1) and (2) are correct D.neither (1) or (2) are correct
