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  • Question
  • A flow is called super-sonic if the


  • Options
  • A. velocity of flow is very high
  • B. discharge is difficult to measure
  • C. Mach number is between 1and 6
  • D. none of these

  • Correct Answer
  • Mach number is between 1and 6 


  • Hydraulics and Fluid Mechanics problems


    Search Results


    • 1. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

    • Options
    • A. surface tension
    • B. compressibility
    • C. capillarity
    • D. viscosity
    • Discuss
    • 3. Newton's law of viscosity is a relationship between

    • Options
    • A. pressure, velocity and temperature
    • B. shear stress and rate of shear strain
    • C. shear stress and velocity
    • D. rate of shear strain and temperature
    • Discuss
    • 4. In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and ? = Inclination of the gate with the normal to the side of the lock)

    • Options
    • A.
    • B.
    • C. P / 2sin?
    • D.
    • Discuss
    • 5. The magnitude of water hammer depends upon the

    • Options
    • A. elastic properties of the pipe material
    • B. elastic properties of the liquid flowing through the pipe
    • C. speed at which the valve is closed
    • D. all of the above
    • Discuss
    • 6. When the venturimeter is inclined, then for a given flow it will show __________ reading.

    • Options
    • A. same
    • B. more
    • C. less
    • Discuss
    • 7. The specific weight is also known as weight density.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 8. The specific weight of compressible fluids does not remain constant.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

    • Options
    • A. plus
    • B. minus
    • Discuss
    • 10. A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.

    • Options
    • A. steady
    • B. streamline
    • C. turbulent
    • D. unsteady
    • Discuss


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