Which of the following is used for pumping crude oil from oil well ?

Related Mcqs:

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

   A. Electromagnetic pump
   B. Centrifugal pump
   C. Reciprocating pump
   D. Gear pump

2. 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

3. The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as_______________?

   A. Evaporation
   B. Cavitation
   C. Sublimation
   D. Stripping

4. 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.

5. When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an______________________?

   A. Ejector
   B. Blower
   C. Injector
   D. Airlift

6. 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

7. 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

8. 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.

9. A rectangular surface 3′ × 4′, has the lower 3 edge horizontal and 6′ below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water) ?

   A. 39.6y
   B. 48y
   C. 49.2y
   D. 58y

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

    A. Vane
    B. Piston
    C. Centrifugal
    D. Plunger