单项选择题
In a unit injector the amount of fuel that will be forced through the spray nozzle on each stroke of the plunger depends on （）
A.the pump supply pressure
B.the slope of the fuel cam
C.how the plunger is rotated
D.the number of sleeve segments engaged with the rack
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相关考题
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单项选择题
If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an （）
A.cavitation erosion in the water jackets
B.excess corrosion inhibitor in the coolant
C.dirty jacket water cooler
D.defective turbocharger -
单项选择题
Which of the following beneficial results can be expected from supercharging a previously naturally aspirated engine?（）
A.Increased turbulence
B.increased mechanical efficiency
C.Increased brake mean effective pressure
D.All of the above -
单项选择题
Late fuel injection in a diesel engine is indicated by low firing pressure with（）
A.high exhaust temperature
B.low exhaust temperature
C.fuel knock in each cylinder
D.mechanical knock in each cylinder
