单项选择题
A.Faulty thermostatic bypass valve
B.Eroded zinc pencils in the heat exchanger
C.Steam formation in the expansion tank
D.Excessive leakage from jacket water pump seal
单项选择题 Immediately after starting a diesel engine, normal raw water and jacket water pressure are indicatedHowever, the jacket water temperature continues to rise, if there is no change in the sea temperature, you should suspect（）
单项选择题 Trunk-type diesel engine pistons are most effectively cooled by heat（）
单项选择题 As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）