A．backfire through the air intakes
B．develop less power under load
C．have high firing pressures
D．lift its cylinder relief valves
[单选题]The rate of fuel injection in a diesel engine cylinder depends primarily on （）.A . the size of the holes in the fuel nozzleB . timing of the pumpC . supply pressure to the pumpD . shape of the combustion chamber
[单选题]On a diesel engine, fuel is delivered into the combustion space by （）.A . a cooling systemB . a lubrication oil systemC . an electric systemD . an injection system
[单选题]In an ordinary diesel engine the fuel injection begins （）A . after TDCB . before TDCC . after BDCD . before BDC
[单选题]Fuel is admitted to a diesel engine cylinder through the （）.A . intake valvesB . carburetorC . exhaust portsD . injector nozzle
[单选题]The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.A . fuel treatmentB . fuel combustionC . fuel injectionD . fuel separating
[单选题]In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.A . increase its qualityB . obtain complete burningC . reduce its weightD . all of the above
[单选题]Fuel injection systems meter fuel, atomize fuel, and （）.A . create turbulence in the combustion chamberB . aid in completing cylinder scavengingC . inject fuel at the proper timeD . minimize fuel penetration into the cylinder
[单选题]During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.A . ensure penetration and distribution of the fuel in the combustion chamberB . ensure the needle valve is flushed clean during each injectionC . prevent combust
[单选题]The sequence of fuel injection into cylinders is determined by （）.A . the steeringB . the driven gearC . the turning gearD . the timing gear
[单选题]If the needle valve in a fuel injection nozzle sticks open （）.A . no fuel will be delivered through the nozzleB . the nozzle will overheat and crackC . time of injection will changeD . fuel will leak into the drain line