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ESE CE: Fluid Mechanics Champion Quiz 4

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Question 1

Assertion (A):At the point of boundary layer separation, the shear stress is zero.
Reason (R): The point of separation demarcates between zones of forward and reverse flow close to the wall.

Question 2

The thickness of boundary layer in a turbulent flow is

Question 3

Boundary layer separation is caused due to

Question 4

Which one of the following assumptions in deriving the boundary layer equation of flow past a flat plate at zero incidences is not correct?

Question 5

What is the momentum thickness for the boundary layer with velocity distribution

Question 6

Statement-I : Boundary layer theory is applicable only in the vicinity of the leading edge of a flat plate.
Statement-II : Boundary layer theory is based on the assumption that its thickness is small when compared to other linear dimensions in the flow.

Question 7

The velocity distribution in the boundary layer over a flat plate, set parallel to the direction of an incompressible free stream, is given by one-sixth power law of the

What ratio of displacement thickness to boundary layer thickness?

Question 8

The submerged body will be in stable equilibrium if the centre of buoyancy B

Question 9

Assertion (A): Increasing the metacentric height gives greater stability, but reduces the period of roll so that the vessel is less comfortable for passengers.
Reason (R): Warships and racing yachts heave larger metacentric height as their stability is more important than comfort.

Question 10

A ship has a metacentre height of 0.90 m and its period of rolling is 20 seconds. The relevant radius of gyration is nearly

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Oct 19ESE & GATE CE