单项选择题
A.To test the starting system
B.To remove air bubbles from the jacket water
C.To ensure that the lube oil system delivers pressure
D.To ensure foreign material (water etc) is not present in the cylinders
单项选择题 In a diesel engine, a positive displacement type blower is usually （）
单项选择题 If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the （）
单项选择题 Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）