A.cooling system
B.a lubricating system
C.an electric system
D.an injection system
第1题
The amount of fuel delivered by a unit injector is controlled by the _____.
A.camshaft
B.main spring
C.rack position
D.nozzle orifice size
第2题
On a diesel engine, fuel is delivered into the combustion space by _____.
A.a cooling system
B.a lubrication oil system
C.an electric system
D.an injection system
第3题
A.Proper timing
B.Accurate metering
C.Suitable injection rate
D.Suitable atomization rate
第4题
A.no fuel will be delivered through the nozzle
B.the nozzle will overheat and crack
C.time of injection will change
D.fuel will leak into the drain line
第5题
A.varying the pump discharge pressure
B.varying the pump return pressure
C.rotation of the pump plunger
D.rotation of the pump barrel
第6题
A.Fuel injection timing will change
B.Nozzle operation will be unaffected
C.Fuel will leak into the drain line
D.Fuel will not be delivered
第7题
A.a cooling system
B.a lubricating system
C.an electric system
D.an injection system
第8题
A.deliver proper fuel quantity to the injection nozzle
B.provide rapid fuel injection cutoff
C.control fuel quantity entering the pump body
D.control fuel pressure delivered to the combustion chamber
第9题
A.changes the position of the fuel inlet ports
B.changes the length of the pump stroke
C.varies the quantity of fuel delivered
D.varies the compression of the delivery valve spring
第10题
Fuel is delivered into the combustion space by _____.
A.a cooling system
B.a lubricating system
C.an electric system
D.an injection system
第11题
A.camshaft
B.main spring
C.rack position
D.nozzle orifice size
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