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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

w/h
h/w
h
wh

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

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z - p/w - v²/2g = constant
Z - p/w + v²/2g = constant
Z + p/w + v²/2g = constant
Z + p/w - v²/2g = constant

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Hydraulics and Fluid Mechanics in ME
Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?

Pelton wheel
Francis turbine
Kaplan turbine
None of these

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Square root of fan speed
Directly as fan speed
Cube of fan speed
Square of fan speed

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Hydraulics and Fluid Mechanics in ME
If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

V1² / (V1² - V2²)
(V­1 - V2) / V1
(V­1² - V2²) / V1²
V1 / (V1 - V2)

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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