Gear pump_________________?

Related Mcqs:

1. When the water is warm, the height to which it can be lifted by a pump_________________?

   A. Decreases due to reduced viscosity
   B. Decreases due to reduced vapour pressure
   C. Increases due to increased vapour pressure
   D. Decreases due to increased frictional resistance

2. 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.

3. Capacity of a rotary gear pump can be varied by__________________?

   A. Changing the speed of rotation
   B. Bleeding air into suction
   C. Bypassing liquid from the suction or discharge line
   D. All A., B. and C.

4. The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for ______________ fluid?

   A. Newtonian
   B. Dilatant
   C. Pseudo-plastic

   D. Non-Newtonian

5. The maximum depth from which a centrifugal pump can draw water is________________?

   A. Dependent on the speed of the pump
   B. Dependent on the power of the pump
   C. 34 feet
   D. 150 feet

6. In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?

   A. Vavg
   B. 1.2 Vavg
   C. 1.5 Vavg
   D. 1.8 Vavg

7. Curve III in the bellow diagram represents a/an________________?

   A. Dilatent fluid
   B. Pseudo plastic fluid
   C. Ideal plastic
   D. None of these

8. For the same flow rate of a fluid, the pressure drop is the least for ____________________?

   A. Venturimeter
   B. Orificemeter
   C. Flow-nozzle
   D. Δp is same for all

9. A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be _______________ cms?

   A. 17
   B. 42
   C. 84
   D. 1.8

10. The terminal velocity of a particle moving through a fluid varies as dp n. The value of n is equal to _______________ in Stoke’s law regime?

    A. 1
    B. 0.5
    C. 2
    D. 1.5