單項(xiàng)選擇題

If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.

A.capacity will increase
B.capacity will decrease
C.suction pressure will increase
D.suction pressure will decrease

你可能感興趣的試題

單項(xiàng)選擇題

On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.

A.hydraulic
B.electric
C.steam
D.diesel

單項(xiàng)選擇題

When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.

A.increase the amount of cooling water to the condenser
B.decrease the amount of cooling water to the condenser
C.add more refrigerant to the system
D.remove some refrigerant from the system