单项选择题
A.They regulate the combustion cycle B.They supply cooling water C.They synchronize the ignition spark D.They supply and regulate the lubricant flow
What is the operating principal of a flash type evapora...
单项选择题What is the operating principal of a flash type evaporator?（）
A.Sea water is heated to boiling temperature under a vacuum B.Sea water is passed over heated plates in a thin film C.Heated sea water is injected into a vacuum chamber D.Sea water is forced through a heated eductor
What is the effect of heated intake air on a diesel eng...
单项选择题What is the effect of heated intake air on a diesel engine? （）
A.Increases efficiency B.Increases engine horsepower C.Increases engine life D.Reduces engine horsepower
What is one effect of running a diesel engine at too co...
单项选择题What is one effect of running a diesel engine at too cool a temperature? （）
A.Buildup of sludge in the lubricating system B.Excessive fuel consumption C.Severe heat stresses on mechanical parts D.Foaming of the lubricating oil
