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  • Question

  • The velocity at which the laminar flow stops, is known as


  • Options
  • A. velocity of approach
  • B. lower critical velocity
  • C. higher critical velocity
  • D. none of these

  • Correct Answer
  • lower critical velocity 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. The flow of water through the hole in the bottom of a wash basin is an example of

    • Options
    • A. steady flow
    • B. uniform flow
    • C. free vortex
    • D. forced vortex
      • Discuss
    • 2. The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 3. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

    • Options
    • A. tan ? = a/g
    • B. tan ? = 2 a/g
    • C. tan ? = a/2g
    • D. tan ? = a2/2g
      • Discuss
    • 4. When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 5. If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The ratio of the inertia force to the gravity force is called Froude number.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 7. A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

    • Options
    • A. 2.89 kN
    • B. 8.29 kN
    • C. 9.28 kN
    • D. 28.9 kN
      • Discuss
    • 10. A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

    • Options
    • A. it is easier to see through the glass tube
    • B. glass tube is cheaper than a metallic tube
    • C. it is not possible to conduct this experiment with any other tube
    • D. all of the above
      • Discuss

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