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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

wA
wx
wAx/sinθ
wAx

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

(μπ²N/60t) × (R₁² - R₂²)
(μπ²N/60t) × (R₁⁴ - R₂⁴)
(μπ²N/60t) × (R₁ - R₂)
μπ²N/60t) × (R₁³ - R₂³)

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

215.5 r.p.m.
275.4 r.p.m
175.4 r.p.m.
241.5 r.p.m.

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Hydraulics and Fluid Mechanics in ME
A flow is called sub-sonic, if the Mach number is

Less than unity
Unity
Between 1 and 6
More than 6

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Hydraulics and Fluid Mechanics in ME
The specific speed of a hydraulic turbine depends upon

Speed and power developed
Speed and head of water
Speed, power developed and head of water
Discharge and power developed

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Hydraulics and Fluid Mechanics in ME
The working of which of the following hydraulic units is based on Pascal's law?

Air lift pump
Hydraulic coupling
Jet pump
Hydraulic press

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