单项选择题
A.combustion control air system B.supply air system C.ships service air system D.low pressure deck air system
The sensible heat of air is dependent upon the （）.A.dry...
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
Which of the devices listed, when used on an electro-hy...
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
Propeller pitch speed minus ship speed divided by the p...
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
