In most pumps and pump motors overpacking the ball bearings full of grease will result in （）
1、Most pump manufacturers recommended th
Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.Aone size larger than the pump discharge nozzleBthe s...
2、The various pumps and lines are （） to
The various pumps and lines are （） to some extent so that each pump can act as an alternative for another.AinterlockedBinterconnectedCinterferedDinteracted
3、Centrifugal pumps are non-positive and
Centrifugal pumps are non-positive and a fairly （） unit.Alow pressureBlow dischargeClow speedDhigh pressure
4、In a radial piston pump, reversal and
In a radial piston pump, reversal and control of fluid flow are accomplished by moving the （）.Acentral valveBradial plungerCfloating ringDcylinder body
5、If a centrifugal pump vibrates and is
If a centrifugal pump vibrates and is noisy when operating, the cause could be （）.Aworn gland sealing shaftBworn wearing ringsCa bent shaftDreversed pump coupling
6、The motor for the fresh water pump （）.
The motor for the fresh water pump （）.Aneed to repairBneed to be repairedCneeds to repairDneeds repairing