单项选择题
A.cavitation erosion in the water jackets
B.excess corrosion inhibitor in the coolant
C.dirty jacket water cooler
D.defective turbocharger
单项选择题 Which of the following beneficial results can be expected from supercharging a previously naturally aspirated engine?（）
单项选择题 Late fuel injection in a diesel engine is indicated by low firing pressure with（）
单项选择题 In a diesel engine jacket water cooler, with seawater cooling the fresh water, the（）