A.smoother engine operation
B.advanced fuel ignition
C.increased fuel economy
D.reduced engine power
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A.Indicated exhaust pressure readings will increase
B.Pyrometer responses will be retarded
C.Indicated cylinder temperature readings will increase
D.Indicated firing pressure readings will increase
A.clogged lube oil piping
B.excessive valve-guide clearance
C.high lube oil viscosity
D.low lube oil temperature
A.backfire through the air intakes
B.develop less power under load
C.have high firing pressures
D.lift its cylinder relief valves
A.excessively high oil temperatures
B.water or moisture contamination
C.fuel dilution
D.life its cylinder relief vales
In a diesel engine, when refitting piston rings you should （）
Ⅰ.check the ring gap at the smallest diameter of the cylinder
Ⅱ. Remove carbon from the ring groove
A.Ⅰ only
B.Ⅱ only
C.both Ⅰ and Ⅱ
D.neither Ⅰ nor Ⅱ
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