Piezometric head is the sum of the ______________ heads?

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 ____________ is measured by a piezometric opening?

   A. Dynamic pressure
   B. Static pressure
   C. Total pressure
   D. Point velocity

3. The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the___________________?

   A. Static submergence
   B. Net positive suction head (NPSH)
   C. Cavitation sensitivity
   D. Priming

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. The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which “sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis”. The centre of pressure of a rectangular surface (of width ‘w’) immersed vertically in a static mass of fluid is at a depth of (where, y = depth of the liquid) ?

   A. 1/(y/3)
   B. 2y/3
   C. 1/(y/4)
   D. 3y/4

7. 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.

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. 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

10. For flow through a venturi at a particular discharge, the correct relationships among heads at points X, Y, and Z are__________________?

    A. h1 > h2 < h3
    B. h1 > h2 > h3
    C. h2 < h1 < h3
    D. h1 < h2 < h3