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  • Question

  • The hammer blow in pipes occurs when


  • Options
  • A. there is excessive leakage in the pipe
  • B. the pipe bursts under high pressure of fluid
  • C. the flow of fluid through the pipe is suddenly brought to rest by closing of the valve
  • D. the flow of fluid through the pipe is gradually brought to rest by closing of the valve

  • Correct Answer
  • the flow of fluid through the pipe is suddenly brought to rest by closing of the valve 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 2. The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. The metacentric height is the distance between the

    • Options
    • A. centre of gravity of the floating body and the centre of buoyancy
    • B. centre of gravity of the floating body and the metacentre
    • C. metacentre and centre of buoyancy
    • D. original centre of buoyancy and new centre of buoyancy
      • Discuss
    • 4. A flow whose streamline is represented by a straight line, is called __________ dimensional flow.

    • Options
    • A. one
    • B. two
    • C. three
    • D. four
      • Discuss
    • 5. When a body is placed over a liquid, it will sink down if

    • Options
    • A. gravitational force is equal to the upthrust of the liquid
    • B. gravitational force is less than the upthrust of the liquid
    • C. gravitational force is more than the upthrust of the liquid
    • D. none of the above
      • Discuss
    • 6. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.

    • Options
    • A. less than
    • B. more than
      • Discuss
    • 7. The discharge through a channel of trapezoidal section is maximum when

    • Options
    • A. width of channel at the top is equal to twice the width at the bottom
    • B. depth of channel is equal to the width at the bottom
    • C. the sloping side is equal to half the width at the top
    • D. the sloping side is equal to the width at the bottom
      • Discuss
    • 8. The variation in the volume of a liquid with the variation of pressure is called its

    • Options
    • A. surface tension
    • B. compressibility
    • C. capillarity
    • D. viscosity
      • Discuss
    • 9. A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The absolute pressure is equal to

    • Options
    • A. gauge pressure + atmospheric pressure
    • B. gauge pressure - atmospheric pressure
    • C. atmospheric pressure - gauge pressure
    • D. gauge pressure - vacuum pressure
      • Discuss

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