The maximum head that can be developed by a single impeller is _____________ ft?

Related Mcqs:

1. In case of a centrifugal pump, the theoretical head developed is dependent on the _____________ the impeller?

   A. Speed of
   B. Diameter of
   C. Fluid velocity leaving
   D. All A., B. and C.

2. Theoretical head developed by a centrifugal pump does not depend upon the _____________ the impeller?

   A. Radius of
   B. Speed of
   C. Fluid velocity leaving
   D. None of these

3. The blades of a centrifugal impeller are said to be curved forward, if the ____________ of the motion of impeller blades?

   A. Inlet tip of a blade curves in a direction opposite to that
   B. Outlet tip of a blade curves in a direction opposite to that
   C. Inlet tip of a blade is towards the direction
   D. Outlet tip of a blade is towards the direction

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. 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

6. In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the _____________ efficiency?

   A. Manometric
   B. Mechanical
   C. Volumetric
   D. Overall

7. The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________?

   A. Discharge
   B. Suction
   C. Suction minus vapor pressure of the liquid at suction temperature
   D. Discharge minus vapor pressure of the liquid at the discharge temperature

8. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the ____________ head?

   A. Manometric
   B. Total
   C. Static
   D. Friction

9. At a constant speed of the centrifugal pump, it‟s _____________ the impeller diameter?

   A. Capacity varies directly with
   B. Head varies as the square of
   C. Horsepower varies as the cube of
   D. All A., B. and C.

10. The pressure head on sudden contraction in a horizontal pipe is converted into the _____________ head?

    A. Elevation
    B. Velocity
    C. Both A. & B.
    D. Neither A. nor B.