Which of the following is the most common pump for pumping either raw sewage or sludge ?

Related Mcqs:

1. Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the _______________ decreases?

   A. NPSH required
   B. BHP required by the pump
   C. Head of the liquid pumped
   D. All A., B. and C.

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. Pumping of a corrosive liquid is generally preferred to be done by a ______________ pump, as it can be made of a variety of materials including plastics?

   A. Piston
   B. Gear
   C. Positive displacement
   D. Sump

6. Sewage sludge is ______________ type of non-Newtonian fluid?

   A. Dilatant
   B. Bingham plastic
   C. Pseudo plastic
   D. None of these

7. Sewage sludge is an example of the ______________ fluid?

   A. Bingham plastic
   B. Newtonian
   C. Pseudo plastic
   D. Dilatent

8. 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

9. A mono pump is a __________ pump ?

   A. Centrifugal
   B. Piston
   C. Positive acting rotary
   D. A group of vacuum

10. Draining of shallow pits or sump is done by a sump pump, which is a ______________ pump?

    A. Single stage vertical
    B. Centrifugal
    C. Plunger
    D. Diffuser