A.water in the fuel oil supply
B.excessive fuel nozzle holder cooling
C.a distorted fuel spray pattern
D.leakage past the plunger into the oil drain
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A.fuel pumps
B.cylinders
C.fuel strainers
D.all of above
A.low TBN value
B.high alkaline reserve
C.low flash point
D.high pour point
A.up and draw in a fresh air charge
B.down to burn off fuel
C.down to compress the fuel air charge
D.up and force out the exhaust gases
A.late fuel injection
B.early fuel injection
C.high exhaust temperature from that cylinder
D.decreased effective stroke from that injector
In a diesel engine, exhaust valves open before the intake ports are uncovered to （）
Ⅰ.reduce pumping losses
Ⅱ.reduce back pressure
A.Ⅰonly
B.Ⅱonly
C.bothⅠand Ⅱ
D.neitherⅠnor Ⅱ
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