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GATE Prev Year : Fluid Mechanics Test-3

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Question 1

A hydraulic turbine develops 1000kW power for a head of 40m. If the head is reduced to 20m, the power developed (in kW) is ______.

Question 2

If x is the distance measured from the leading edge of a flat plate, the laminar boundary layer thickness varies as

Question 3

Consider laminar flow of water over a flat plate of length 1 m. If the boundary layer thickness at a distance of 0.25 m from the leading edge of the plate is 8 mm, the boundary layer thickness (in mm), at a distance of 0.75 m, is _______

Question 4

Two pipelines, one carrying oil (mass density 900 kg/m³) and the other water, are connected to a manometer as shown in the figure. By what amount the pressure in the water pipe should be increased so that the mercury levels in both the limbs of the manometer become equal? (Mass density of mercury = 13,550 kg/m³ and g = 9.81 m/s²)

Question 5

A water container is kept on a weighting balance. Water from a tap is falling vertically into the container with a volume flow rate of Q; the velocity of the water when it hits the water surface is U. At a particular instant of time the total mass of the container and water is m the force registered by the weighing balance at this instant of time is

Question 6

The height of a hydraulic jump in the stilling pool of 1:25 scale model was observed to be 10 cm. The corresponding proto type height of the jump is

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ESE & GATE ME Fluid Mechanics & Machinery

Nov 26ESE & GATE ME