Volute type of casing is provided in a centrifugal pump to___________________?

Related Mcqs:

1. Volute of a centrifugal pump should be designed in a fashion, such that the________________?

   A. Kinetic head gets converted into static head
   B. Moving stream gradually reduces velocity
   C. Mean velocity remains constant
   D. None of these

2. A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit E. to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062 ?

   A. 10 m
   B. 11 m
   C. 11.8 m
   D. 30 m

3. A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now_________________?

   A. Increase
   B. Decrease
   C. Remain same
   D. Data insufficient to predict

4. A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump_________________?

   A. Develops a lower head
   B. Capacity is reduced
   C. Requires more power
   D. All A., B. and C.

5. Design of the casing of centrifugal pump should be such as to minimise the________________?

   A. Back flow through impeller
   B. Loss of kinetic head
   C. Loss of static head
   D. None of these

6. Higher specific speed (200-500) of a centrifugal pump indicates that the pump is of ______________ flow type?

   A. Axial
   B. Radial
   C. Mixed
   D. None of these

7. Priming of a centrifugal pump is done to___________________?

   A. Increase the mass flow rate of fluid
   B. Develop effective pressure rise by the pump
   C. Avoid chances of separation inside the impeller
   D. None of these

8. A centrifugal pump is called a turbine pump, if it is having a_________________?

   A. Turbine type impeller
   B. Vaned diffusion casing
   C. Rotating vaned volute
   D. None of these

9. Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) ?

   A. D = 1840 H0.5/N
   B. D = 1840 N/H0.5
   C. H = 1840 D0.5/N
   D. D = 1840 H/N

10. Specific speed of a centrifugal pump relates it with another pump having the___________________?

    A. Dynamic similarity
    B. Same efficiency
    C. Same speed
    D. Geometrical similarity