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Which of the following statements is/are TRUE ?

1. The thickness of a turbulent boundary layer on a flat plate kept parallel to the flow direction is proportional to the square root of the distance from the leading edge
2. If the streamlines and equipotential lines of a source are interchanged with each other, the resulting flow will be a sink
3. For a curved surface immersed in a stationary liquid, the vertical component of the force on the curved surface is equal to the weight of the liquid above it
4. For flow through circular pipes, the momentum correction factor for laminar flow is larger than that for turbulent flow

Correct answer: For flow through circular pipes, the momentum correction factor for laminar flow is larger than that for turbulent flow

Solution

In laminar flow, the velocity profile is parabolic, leading to a greater momentum correction factor compared to turbulent flow, which has a flatter profile. This results in a more uniform velocity distribution in turbulent flow, thus requiring a smaller correction factor.

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