单项选择题
With Variable Injection Timing the start of injection may be （）as the engine load is reduced.
A.advanced
B.retarded
C.kept constant
D.none of the above
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相关考题
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单项选择题
With the shell and cap assembled as for running, a check must be made that the clearance between the cap and the housing （）.
A.has a nip
B.is large enough
C.is zero
D.are suitable -
单项选择题
With the crank in position in the engine, some measurements can be taken by a special bridge gauge and （）.
A.a micrometer
B.a bowl
C.a feeler gauge
D.a wrench -
单项选择题
With four-stroke engines, it takes four revolutions of the crank shaft to make （） power stroke(s).
A.1
B.2
C.4
D.8
