Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have_____________?

Related Mcqs:

1. Centrifugal pumps as compared to reciprocating pumps__________________?

   A. Run at a lower speed for the same discharge
   B. Do not need priming
   C. Deliver fluid with pulsating/fluctuating discharge
   D. Can be run with discharge line valve closed for a short interval

2. Reciprocating pumps compared to centrifugal pumps__________________?

   A. Deliver liquid at uniform pressure
   B. Can handle slurries more efficiently
   C. Are not subject to air binding
   D. Can be operated with delivery valve closed

3. 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

4. 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

5. 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.

6. A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double___________________?

   A. Head
   B. Discharge
   C. Efficiency
   D. None of these

7. _____________________ pumps are a group of vacuum pumps ?

   A. Hyster
   B. Sump
   C. Mono
   D. Submerged

8. ______________ pumps are axial flow pumps?

   A. Turbine
   B. Propeller
   C. Diffuser
   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