单项选择题
A.To prevent internal damage form local overheating
B.To ensure the fuel nozzles are flushed clean
C.To clear the smoke stack
D.To let the waste heat boiler reduce its rate of steam generation
单项选择题 Clogged diesel engine fuel oil filters can cause（）
单项选择题 If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）
单项选择题 Which of the following statements concerning fuel atomization in a diesel engine cylinder is correct?（）