单项选择题
A.the running-in period B.the running process C.gas exchange process D.the boiler firing
Air cocks, usually positioned at the （） in a circulatin...
单项选择题Air cocks, usually positioned at the （） in a circulating system, is used to get rid of the air in the system.
A.bending joint B.expansion tank C.weld D.the highest point
After the order “（）” is given, the air system is shut d...
单项选择题After the order “（）” is given, the air system is shut down, the turning gear put in.
A.Finished with Engine B.Stop the Engine C.Stand-by Engine D.Slow-down Engine
After the engine is warned, we should（） the turning gea...
单项选择题After the engine is warned, we should（） the turning gear before starting up the engine.
A.take in B.put in C.take out D.put up
