單項(xiàng)選擇題The bore of a diesel engine cylinder describes the ()

A.swept volume of the cylinder
B.inside diameter of the cylinder
C.piston displacement in the cylinder
D.length of the piston stroke


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2.單項(xiàng)選擇題Compared to a naturally aspirated diesel engine, a supercharged diesel engine has()

A.a cylinder air charge of higher pressure
B.increased pumping losses
C.less valve overlap
D.reduced blow-by

3.單項(xiàng)選擇題Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and ()

A.low exhaust temperature
B.low firing pressure
C.fuel knock in each cylinder
D.mechanical knock in each cylinder

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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

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