Medium viscosity lubricating oil can be most ideally pumped by a ______________ pump?

Related Mcqs:

1. 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

2. A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is _____________ litres?

   A. 600
   B. 660
   C. 1.1
   D. 60

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. 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

6. Slurries can be most conveniently pumped by a _______________ pump?

   A. Screw
   B. Reciprocating
   C. Gear
   D. Centrifugal

7. A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke’s law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity ?

   A. Same as that of A
   B. One fourth as that of A
   C. Twice as that of A
   D. Four times as that of A

8. Low specific speed of a pump implies that, it is a/an ______________ pump?

   A. Axial flow
   B. Centrifugal
   C. Mixed flow
   D. None of these

9. 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

10. Boiler feed water pump is usually a ______________ pump?

    A. Reciprocating
    B. Gear
    C. Multistage centrifugal
    D. Diaphragm