单项选择题
A.control inlet air temperature
B.control inlet air volume
C.maintain relative humidity at 15%
D.restore conditioned air temperature to a comfortable level
单项选择题 If one of the bilge system manifold valves does not properly seat, the （）
单项选择题 An exhaust gas bypass is installed on a waste heat boiler in order to （）.
单项选择题 Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?（）