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  • Question

  • The discharge over a rectangular notch is


  • Options
  • A. inversely proportional to H3/2
  • B. directly proportional to H3/2
  • C. inversely proportional to H5/2
  • D. directly proportional to H5/2

  • Correct Answer
  • directly proportional to H3/2 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

    • Options
    • A. w
    • B. wh
    • C. w/h
    • D. h/w
      • Discuss
    • 2. A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

    • Options
    • A. 0.46
    • B. 0.64
    • C. 0.78
    • D. 0.87
      • Discuss
    • 3. Reynold's number is the ratio of the inertia force to the

    • Options
    • A. surface tension force
    • B. viscous force
    • C. gravity force
    • D. elastic force
      • Discuss
    • 4. A flow is called hyper-sonic, if the Mach number is

    • Options
    • A. less than unity
    • B. unity
    • C. between 1 and 6
    • D. none of these
      • Discuss
    • 5. The velocity at which the flow changes from laminar flow to turbulent flow is called

    • Options
    • A. critical velocity
    • B. velocity of approach
    • C. sub-sonic velocity
    • D. super-sonic velocity
      • Discuss
    • 6. A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, ? = Angle of contact of the liquid surface, and ? = Surface tension)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. The vacuum pressure can be measured with the help of a piezometer tube.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 9. The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

    • Options
    • A. 0.0116 stoke
    • B. 0.116 stoke
    • C. 0.0611 stoke
    • D. 0.611 stoke
      • Discuss
    • 10. Water is a __________ fluid.

    • Options
    • A. real
    • B. ideal
    • C. newtonian
    • D. non-newtonian
      • Discuss

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