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  • Question

  • The centre of pressure of a vertical plane immersed in a liquid is at


  • Options
  • A. centre of higher edge
  • B. centre of lower edge
  • C. centroid of the area
  • D. none of these.

  • Correct Answer
  • none of these. 

    • Hydraulics problems

    Search Results

    • 1. The pressure rise due to water hammer depends upon

    • Options
    • A. the velocity of flow of water in the pipe
    • B. the length of pipe
    • C. time taken to close the valve
    • D. the elasticity of the pipe material
    • E. All of above.
      • Discuss
    • 2. For a most economical rectangular channel, the width of the channel must be

    • Options
    • A. equal to depth of flow
    • B. twice the depth of flow
    • C. half the depth of flow
    • D. None of these.
      • Discuss
    • 3. If a1 and a2 are the cross-sectional areas of a tank and orifice, h the height of water level in tank above the centre of the orifice, the velocity of approach is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. Equation of continuity of flow is based on the principle of conservation of

    • Options
    • A. mass
    • B. momentum
    • C. force
    • D. none of these.
      • Discuss
    • 5. The ratio of time for completely emptying the hemispherical tank and circular horizontal tank of equal radii both fitted with similar orifices at their bottoms is :

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. In an inclined pipe, the pressure difference at its two ends is due to

    • Options
    • A. sudden head drop at inlet
    • B. exit head drop
    • C. frictional loss head
    • D. elevation head
    • E. all the above.
      • Discuss
    • 7. The flow in open channel is laminar if the Reynold number is

    • Options
    • A. less than 500
    • B. more than 500
    • C. 1000
    • D. none of these.
      • Discuss
    • 8. The initial difference between liquid levels of two identical cylindrical vessels having their area of cross-section A, is H. Flow time T from one vessel to another through an orifice having coefficient of discharge Cd and area a will be

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. The ratio of the hydraulic radius of a pipe running full to the hydraulic radius of a square section of a channel whose side is equal to the diameter of the pipe, is

    • Options
    • A. 1
    • B.
    • C.
    • D.
      • Discuss
    • 10. Most economical section of a circular channel for maximum velocity, is if,

    • Options
    • A. depth of water = 0.810 diameter
    • B. hydraulic mean depth = 0.304 diameter
    • C. wetted perimeter = 2.245 diameters
    • D. all the above.
      • Discuss

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