单项选择题
A.increasing the quantity of starting air
B.increasing the lube oil pressure
C.heating the engine fuel supply
D.heating the engine coolant
单项选择题 The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）
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（）