Motion of a liquid in a volute casing of a centrifugal pump is an example of____________________?

Related Mcqs:

1. In a centrifugal pump casing, the flow of water leaving the_______________?

   A. radial
   B. radial
   C. centrifugal
   D. rectilinear
   E. vortex

2. In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?

   A. rectilinear flow
   B. radial flow
   C. free vortex motion
   D. forced vortex
   E. none of the above

3. A turbine pump is basically a centrifugal pump equipped additionally with_________________?

   A. adjustable blades
   B. backward curved blades
   C. vaned diffusion casing
   D. inlet guide blades
   E. totally submerged operation facility

4. In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?

   A. designing new impeller
   B. trimming the impeller size to the required size by machining
   C. not possible
   D. some other alterations in the impeller
   E. none of the above

5. In a centrifugal pump, the liquid enters the pump__________________?

   A. at the top
   B. at the bottom
   C. at the center
   D. from sides
   E. none of the above

6. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge_____________________?

   A. same quantity of liquid
   B. 0.75 Q
   C. Q/0.75
   D. 1.5 Q
   E. none of the above

7. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?

   A. high initial and maintenance cost
   B. lower discharge
   C. lower speed of operation
   D. necessity of air vessel
   E. all of the above

8. Centrifugal pump is started with its delivery valve __________________?

   A. kept fully closed
   B. kept fully open
   C. irrespective of any position
   D. kept 50% open
   E. none of the above

9. The efficiency of a centrifugal pump is maximum when its blades are__________________?

   A. straight
   B. bent forward
   C. bent backward
   D. bent forward first and then backward
   E. bent backward first and then forward

10. Casting of a centrifugal pump is designed so as to minimize________________?

    A. friction loss
    B. cavitation
    C. static head
    D. loss of kinetic energy
    E. starting time