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GATE 2020: Fluid Mechanics and Machinery Rapid Quiz 1

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Question 1

Determine the specific gravity of the liquid Y for the fig. given below. consider vacuum pressure at A.

Question 2

Semi-circular plane hydraulic gate AB is hinged along B and held by horizontal force applied at A. The liquid to the left of the gate is water. The force required for equilibrium is ________ kN.
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Question 3

Water flows over a flat plate at a free stream velocity of 0.15m/s. Take. There is no pressure gradient and laminar boundary layer is 6mm thick. Assume velocity profile as
for the flow conditions stated above, calculate the skin friction coefficient.

Question 4

A flow is described by the stream function The coordinates of the point at which velocity vector has a magnitude of 4 units and makes an angle 150 ° with the X-axis is

Question 5

N number of pipes are connected in a parallel connection, all having the same diameter of 200mm and same length L. These pipes are to be replaced by a single pipe with Leq=L, the diameter of such a pipe will be 348.22mm. Neglecting all minor losses determine N.

Question 6

To find the metacentre of a ship of 20000 tonnes a weight of 60 tonnes is placed at a distance of 6m from the longitudinal centre plane to cause a heel through an angle of 3 degree. What is the metacentre height?
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