单项选择题
The sensible heat of air is dependent upon the （）.
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
点击查看答案&解析
相关考题
-
单项选择题
Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?（）
A.The follow-up gear
B.The rudder angle indicator
C.The synchronous electric transmitter
D.A rudder angle limit switch -
单项选择题
Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed （）.
A.apparent slip
B.tree slip
C.pitch
D.propulsive efficiency -
单项选择题
A multistage centrifugal pump can be BEST described as having （）.
A.two or more impellers housed together in one casing and mounted on a single shaft
B.a single stepped impeller mounted in a progressively staged casing
C.a large radial clearance between the impeller and casing to prevent overheating due to
D.an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
