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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

0.5 m3/s
1.5 m3/s
2.5 m3/s
0.25 m3/s

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Hydraulics and Fluid Mechanics in ME
The top of the weir over which the water flows is known as

None of these
Orifice
Sill or crest
Nappe or vein

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Hydraulics and Fluid Mechanics in ME
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

28.9 kN
9.28 kN
2.89 kN
8.29 kN

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Hydraulics and Fluid Mechanics in ME
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be

4000 kg
1000 kg
8000 kg
2000 kg

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Hydraulics and Fluid Mechanics in ME
The cavitation in a hydraulic machine

All of these
Causes noise and vibration of various parts
Reduces the discharge of a turbine
Causes sudden drop in power output and efficiency

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Hydraulics and Fluid Mechanics in ME
Newton's law of viscosity is a relationship between

Pressure, velocity and temperature
Shear stress and velocity
Rate of shear strain and temperature
Shear stress and rate of shear strain

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