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GATE 2019 Fluid Mechanics Day 9 Quiz

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Question 1

A Francis turbine working at 400 rpm has a unit speed of 50 rpm and develops 500 kW of power.
What is the effective head under which this turbine operates?

Question 2

Which of the following types of pumps is suitable for pumping viscous fluids?

Question 3

If a jet of water of area 3cm2 strikes with a velocity of 10m/s in a series of flat plate wheel of mean diameter 15cm rotating at 70 rpm then force exerted per unit weight per sec ( N/ N/s) )will be equal to

Question 4

A 60 mm-diameter water jet strikes a plate containing a hole of 40 mm diameter as shown in the figure. Part of the jet passes through the hole horizontally, and the remaining is deflected vertically. The density of water is 1000 kg/m3. If velocities are as indicated in the figure, the magnitude of horizontal force (in N) required to hold the plate is ______

Question 5

If in a pump, the discharge is halved, then assuming that the speed remains unchanged, what would be the ratio of the heads H1/H2?

Question 6

A pump can deliver a discharge of 0.10 Description: E:\Gate\SSC JE Civil Part 1-Done\04_FM_BLok_files\image002.png to a head of 30 m. The critical cavitation number ‘Description: E:\Gate\SSC JE Civil Part 1-Done\04_FM_BLok_files\image200.png’ for the pump is found to be 0.12. The pump is to be installed at a location where the barometric pressure is 96.0 kPa (abs) and the vapour pressure is 3.0 kPa (abs). Assuming an intake pipe friction of 0.3m. The maximum allowable elevation above the sump water surface at which the pump can be located is _______m.[Take g=9.79 Description: E:\Gate\SSC JE Civil Part 1-Done\04_FM_BLok_files\image186.png]
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Jul 27ESE & GATE CE