A . low compression pressure
B . increased piston wear
C . increased cylinder lube oil consumption
D . poor contact between compression rings and liner
[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 cooling water of the diesel engine should be treated with chemical, because it contains .A．alkaliB．acidityC．salinityD．impurity
[单选题]In a diesel engine cooling water system, a pH of 60 indicates a/an （）.A . slightly acidic conditionB . slightly alkaline conditionC . overtreatment of waterD . neutral condition of water
[单选题]For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.A . oil sprayB . oil bathC . oil control ringsD . drilled passage through the camshaft
[单选题]A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.A . slight acidityB . slight alkalinityC . excessive alkalinityD . excessive acidity
[单选题]High diesel engine cooling water temperatures can be caused by （）.A . a worn water pumpB . not enough coolantC . air in the cooling systemD . all of the above
[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]Cooling of engine is achieved by circulation a cooling liquid around internal passages within the （）.A . boilerB . heaterC . engineD . cooler
[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