单项选择题
Which of the listed conditions can cause lacquer to be deposited on a piston skirt?（）
A.High sulphur content fuel
B.High lube oil temperatures
C.High vanadium content fuel
D.Excessive piston slap
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相关考题
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单项选择题
Reducing the clearance between a valve stem and rocker arm will result in the valve （）
A.having a shorter duration of opening
B.having a longer duration of opening
C.closing sooner
D.opening later -
单项选择题
If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）
A.valve will open later
B.valves will close later
C.amount of fuel injected will be increased
D.amount of fuel injected will be decreased -
单项选择题
A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A.a leaking fuel injection nozzle
B.a clogged air filter
C.early fuel injection
D.burned valves
