单项选择题
A.high flash point and high viscosity B.low flash point and high viscosity C.low heating value and high sulphur content D.high heating value and low sulphur content
A.Full power cannot be developed B.The exhaust will contain black smoke C.Complete combustion will be impossible D.All of the above
A.immediately open all crankcase relief ports B.increase crankcase exhauster speed to draw cool air into the engine C.allow the engine to cool naturally D.increase crank case scavenge air to remove unburned gases