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  • Question

  • Coefficient of resistance is the ratio of


  • Options
  • A. actual velocity of jet at vena contracta to the theoretical velocity
  • B. area of jet at vena contracta to the area of orifice
  • C. loss of head in the orifice to the head of water available at the exit of the orifice
  • D. actual discharge through an orifice to the dieoretical discharge

  • Correct Answer
  • loss of head in the orifice to the head of water available at the exit of the orifice 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. A structure whose width is __________ the width of the channel, is called a flumed structure.

    • Options
    • A. less than
    • B. more than
      • Discuss
    • 2. The maximum discharge over a broad crested weir is

    • Options
    • A. 0.384 Cd x L x H1/2
    • B. 0.384 Cd x L x H3/2
    • C. 1.71 Cd x L x H1/2
    • D. 1.71 Cd x L x H3/2
      • Discuss
    • 3. The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy 's coefficient of friction for pipe, and l = Length of pipe )

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. In open channels, the specific energy is the

    • Options
    • A. total energy per unit discharge
    • B. total energy measured with respect to the datum passing through the bottom of the channel
    • C. total energy measured above the horizontal datum
    • D. kinetic energy plotted above the free surface of water
      • Discuss
    • 5. A siphon is used to connect two reservoirs at different levels intervened by a high ridge.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.

    • Options
    • A. 1%
    • B. 1.5%
    • C. 2%
    • D. 2.5%
      • Discuss
    • 7. The pressure less than atmospheric pressure is known as

    • Options
    • A. suction pressure
    • B. vacuum pressure
    • C. negative gauge pressure
    • D. all of these
      • Discuss
    • 8. The value of bulk modulus of a fluid is required to determine

    • Options
    • A. Reynold's number
    • B. Froude's number
    • C. Mach number
    • D. Euler's number
      • Discuss
    • 9. The Reynold's number of a ship is __________ to its velocity and length.

    • Options
    • A. directly proportional
    • B. inversely proportional
      • Discuss
    • 10. The coefficient of discharge for an external mouthpiece is

    • Options
    • A. 0.375
    • B. 0.5
    • C. 0.707
    • D. 0.855
      • Discuss

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