单项选择题
A.As pressure decreases, volume increases B.As volume increases, pressure increases C.As volume decreases, pressure decreases D.As pressure increases, volume increases
To operate a centrifugal fire pump at reduced capacity,...
单项选择题To operate a centrifugal fire pump at reduced capacity, you should （）.
A.readjust the relief valve B.throttle the suction line C.throttle the discharge valve D.open the priming line
An AC synchronous transmission type remote steering con...
单项选择题An AC synchronous transmission type remote steering control system consists of a （）.
A.transmitter at the steering station and a receiver at the steering engine B.reversible motor at the steering station geared to the steering pumps C.small induction motor on the bridge which controls the redder through pulleys D.variable displacement hydraulic pump driven by a reversible DC motor
In which of the areas listed would you expect to find t...
单项选择题In which of the areas listed would you expect to find the highest salt concentration in a flash evaporator?（）
A.Distiller air ejector cooling medium B.Saltwater heater discharge C.First-stage internal feed box D.Second-stage internal feed box
