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GATE 2020: Fluid Mechanics Quiz 6

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Question 1

Flow with only a local acceleration will be

Question 2

Consider a velocity field

, where is a constant. The vorticity Ω_z, is ________.

Question 3

For a fluid flow through a divergent pipe of length L having inlet and outlet radii and R1 and R2 respectively and a constant flow rate of Q, assuming the velocity to be axial and uniform at any cross section, the acceleration at the exit is

Question 4

A steady incompressible, two dimensional velocity field is given by

The distance of stagnation point from the origin of reference axes will be _______.

Question 5

Two reservoirs 4 km apart have a difference of water level of 40 m and are connected together by a pipeline of 30 cm diameter. Water is siphoned from one reservoir to another as shown in figure. Take f =0.008 and atmospheric pressure as 10.2 m of water, and neglect losses at entry to the pipe and at exit from the pipe. The value of ‘y’, so that the pressure at highest point of pipeline doesn’t fall 8 m below atmospheric pressure, will be

Question 6

Water flows through a 0.8m diameter pipe at the end of which there is a reducer connecting to a 0.6 m diameter pipe. If gauge pressure at the entrance to reduce is 400 KN/m² and velocity is 2m/sec. Determine the magnitude of thrust on reducer(KN) assuming that frictional head loss through reducer is 1m.

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ESE & GATE ME Fluid Mechanics & Machinery

Feb 8ESE & GATE ME