A . intake valves
B . carburetor
C . exhaust ports
D . injector nozzle
[单选题]Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits may cause ().A . low compression pressureB . increased piston wearC . increased cylinder lube oil consumptionD . poor contact between compression rings and l
[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]If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.A.backfire through the air intakesB.develop less power under loadC.have high firing pressuresD.li
[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]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]Engine displacement is equal to the cylinder ().A . area times the strokeB . area times the stroke, times the number of cylindersC . volume times the strokeD . volume times the stroke, times the number of cylinder
[单选题]_____ the engines, the diesel engine is ____ used engine on boardA.Between / more commonlyB.Among / the most commonlyC.Between / not more commonlyD.Among / not the most commonly
[单选题]The heart of the diesel engine is the () where the fuel is burnt and the power developed.A . crankcaseB . cylinderC . scavenge boxD . pisto