单项选择题
A.worn bearings and piston pins B.slugging due to flooding back C.too much oil in circulation D.All of the above
The air charge leaving an intercooler, or after-cooler ...
单项选择题The air charge leaving an intercooler, or after-cooler of an air compressor can be expected to be （）.
A.superheated B.super-cooled C.at or below the dew point D.All of the above
Before starting a reciprocating, steam-driven pump that...
单项选择题Before starting a reciprocating, steam-driven pump that has been idle for a period of time, you should （）.
A.open the steam line mot valve B.drain the steam cylinder C.close the steam cylinder drains D.open the liquid cylinder drains
When air becomes trapped in the hydraulic fluid of a st...
单项选择题When air becomes trapped in the hydraulic fluid of a steering system, the （）.
A.rudder will respond sluggishly B.hydraulic rams will over-speed C.sight glass will show bubbles D.ram relief valves will lift
