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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

high pressure
high velocity
weak material
low pressure

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Hydraulics and Fluid Mechanics in ME
Which of the following manometer has highest sensitivity

U-tube with water
U-tube with mercury
inclined U-tube
micro-manometer with water

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

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Hydraulics and Fluid Mechanics in ME
The time oscillation of a floating body with increase in meatcentric height will be

Higher
Lower/higher depending on weight of body
Same
Lower

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Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

2.4 m
3.0 m
2.5 m
4.0 m

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Hydraulics and Fluid Mechanics in ME
The normal stress in a fluid will be constant in all directions at a point only if

It is incompressible
It is at rest
It has zero viscosity
It has uniform viscosity

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