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GATE XE 2021: Fluid Mechanics Quiz 15 (App update required to attempt this test)
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Question 1
If x is the distance measured from the leading edge of a flat plate, the laminar boundary layer thickness varies as
Question 2
Which one is correct for Bernoulli’s equation
1) For a rotational flow Bernoulli’s equation can be applied at any point in a flow.
2) It is applicable for steady rotational incompressible flow.
3) It is not applicable within a boundary layer region.
4) For rotational flow it can be applied along a streamline.
1) For a rotational flow Bernoulli’s equation can be applied at any point in a flow.
2) It is applicable for steady rotational incompressible flow.
3) It is not applicable within a boundary layer region.
4) For rotational flow it can be applied along a streamline.
Question 3
Consider the following statements:
1- A streamline is a curve drawn in space, which is tangent everywhere to the velocity vector.
2- No fluid may enter or leave a stream tube excepts through its ends.
3- A path line refers to the identity of a fluid particle.
4- For a streak-line analysis,a fixed point should be under consideration.
Which of the above are correct?
1- A streamline is a curve drawn in space, which is tangent everywhere to the velocity vector.
2- No fluid may enter or leave a stream tube excepts through its ends.
3- A path line refers to the identity of a fluid particle.
4- For a streak-line analysis,a fixed point should be under consideration.
Which of the above are correct?
Question 4
Laminar boundary layer flow past the square plate arrangements is shown in figure. Comparing to the friction drag of a single plate (1), how much larger is the drag of four plates together as in configurations (2)
Question 5
For Laminar flow of an oil having dynamic viscosity μ = 1.67 Pa.s in a 0.2m diameter pipe, the velocity distribution is parabolic with a maximum point velocity of 2.5 m/s at the centre of the pipe. Calculate the shearing stresses at the pipe wall.
Question 6
A hydraulic press has a ram of 20 cm diameter and a plunger of 5 cm diameter. The weight (in KN) lifted by the hydraulic press when the force applied at the plunger is 700 N is ____.
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