單項選擇題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


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1.單項選擇題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

3.單項選擇題After passing through the turbine the exhaust gas is conducted out into the().

A.intercooler
B.compressor
C.cylinder
D.open air

4.單項選擇題After fitting back in place the gear wheels, dont forget () them.

A.to grease
B.greasing
C.oiling
D.lubricating