A pressure of 10 m head of water is equivalent to ______________ kN/m2?

Related Mcqs:

1. 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

2. 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.

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. Velocity head on sudden enlargement in a horizontal pipe is converted into ______________ head?

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

5. A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ______________ metres?

   A. 2
   B. 4
   C. 8
   D. 5.5

6. Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?

   A. H
   B. 12.6 H
   C. 13.6 H
   D. 14.6 H

7. Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the___________________?

   A. Pipe length
   B. Fluid velocity in the pipe
   C. Time taken to close the valve
   D. All A., B. and C.

8. A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be__________________?

   A. 100
   B. 200
   C. 320
   D. 160

9. 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

10. 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