A . after TDC
B . before TDC
C . after BDC
D . before BDC
[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]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]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]For an ordinary four-stroke diesel engine the exhaust valves close ().A . after TDCB . before TDCC . after BDCD . before BDC
[单选题]For an ordinary four-stroke engine the inlet valves open ()A . after TDCB . before TDCC . after BDCD . before BDC
[单选题]In an ordinary four-stroke engine the exhaust valves open ()A . after TDCB . before TDCC . after BDCD . before BDC
[单选题]For an ordinary four-stroke engine the exhaust valves open ().A . after TDCB . before TDCC . after BDCD . before BDC
[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