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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

9.75 m/sec²
10 m/sec²
9.81 m/sec²
9 m/sec

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

Lower than
Same as
Higher than
None of these

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Hydraulics and Fluid Mechanics in ME
Metacentric height is the distance between the metacentre and

center of buoyancy
center of gravity
water surface
center of pressure

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Hydraulics and Fluid Mechanics in ME
Medium specific speed of turbine implies it is

Francis turbine
Any one of the above
Impulse turbine
Propeller turbine

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

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

is large when fluid is more compressible
is independent of pressure and viscosity
increases with pressure
has the dimensions of 1/pressure

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