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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The dynamic viscosity of the liquid __________ with rise in temperature.

Remain unaffected
None of these
Decreases
Increases

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Hydraulics and Fluid Mechanics in ME
A double overhung Pelton wheel has

Four runners
Four jets
Two jets
Two runners

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Hydraulics and Fluid Mechanics in ME
Which of the following is an example of laminar flow?

Flow of oil in measuring instruments
All of these
Underground flow
Flow past tiny bodies

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Hydraulics and Fluid Mechanics in ME
According to equation of continuity,

a1v1 = a2v2
w1v1 = w2v2
a1/v1 = a2/v2
w1a1 = w2a2

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Hydraulics and Fluid Mechanics in ME
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

H = Hg + hf
H = Hg × hf
H = Hg/hf
H = Hg - hf

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

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

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