Mechanical Engineering Exam > Mechanical Engineering Tests > Fluid Mechanics for Mechanical Engineering > Test: Boundary Layer Theory - 3 - Mechanical Engineering MCQ
Test: Boundary Layer Theory - 3 - Mechanical Engineering MCQ
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10 Questions MCQ Test Fluid Mechanics for Mechanical Engineering - Test: Boundary Layer Theory - 3
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Test: Boundary Layer Theory - 3 - Question 1
The hydrodynamic boundary layer thickness is defined as the distance from the surface where the
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Test: Boundary Layer Theory - 3 - Question 2
Laminar boundary layer thickness (δ) at any point x for flow over a flat plate is given by δ/x
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Test: Boundary Layer Theory - 3 - Question 3
The velocity profile for turbulent layer over a flat plate is
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Test: Boundary Layer Theory - 3 - Question 5
According to Blasius, the local skin friction coefficient in the boundary layer over a flat plate is given by
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Test: Boundary Layer Theory - 3 - Question 6
The thickness of laminar boundary layer at a distance 'x' from the leading edge over a flat plate varies as
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Test: Boundary Layer Theory - 3 - Question 7
The Von-karman momentum integral equation expressed as (where θ is momentum thickness)
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Test: Boundary Layer Theory - 3 - Question 8
Consider the following statements:
Boundary layer separation is caused by:
1. An adverse pressure gradient
2. Sudden entrapping of air
3. Reduction of pressure gradient to zero
4. Release of bubbles from the fluid when the pressure goes below the vapor pressure
Q. Which of the above statements is/are correct?
Test: Boundary Layer Theory - 3 - Question 9
Air flows past a golf bail of 20 mm radius. It is observed that the boundary layer becomes turbulent at Reynolds number of 2 x 105. If the kinematic viscosity of air is 1.5 x 10-5 m2/sec then the speed of air when the flow becomes turbulent is
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Test: Boundary Layer Theory - 3 - Question 10
Blasius equation for a flat plate laminar boundary layer flow is a third order
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