A、gear
B、nonpositive displacement
C、positive displacement
D、rotary
更多“The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.”相关的问题
A、high-pressure steam-driven air-ejector B、motor-driven vacuum pump C、water-motivated air eductor D、centrifuge pump
A、The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump B、Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight C、Rotary pumps occupy only one-half the space of reciprocating pumps D、Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
A、one size larger than the pump discharge nozzle B、the same size as the pump discharge nozzle C、one size smaller than the pump discharge nozzle D、installed with a short radius elbow at the pump
A、centerline of the pump and the level of the liquid in the suction well when the source of liquid is below the pump B、centerline of the pump and the suction liquid level when the source of liquid is above the pump C、centerline of the pump and the level of the discharge liquid D、liquid levels of the suction and discharge
A、one size smaller than the pump suction nozzle B、the same size as the pump suction nozzle C、one size larger than the pump suction nozzle D、installed with a short radius elbow at the pump
A、varying the pump discharge pressure B、varying the pump return pressure C、rotation of the pump plunger D、rotation of the pump barrel
A、Condenser circulating water pump B、Feed-water heater drain pump C、Distillate pump D、Air ejector condenser drain pump
A、directly increase the pressure of the liquid being pumped B、directly increase the velocity of the liquid being pumped C、convert the potential energy of the liquid to kinetic energy D、separate air from the liquid being pumped
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