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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

52 cm
52.2 cm
51 cm
50 cm

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Hydraulics and Fluid Mechanics in ME
The loss of pressure head in case of laminar flow is proportional to

(Velocity)3
(Velocity)4
(Velocity)2
Velocity

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump depends on

Speed
Impeller diameter
Both (A) and (B) above
Fluid density

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Hydraulics and Fluid Mechanics in ME
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.67 times
0.81 times
0.95 times
0.34 times

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Hydraulics and Fluid Mechanics in ME
The efficiency of a Pelton wheel working under constant head ________ with the increase in power.

Increases
Decreases
None of these
Remain same

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Hydraulics and Fluid Mechanics in ME
Which of the following statement is correct as regard to water wheels?

They give constant efficiency, even if the discharge is not constant
They have slow speeds
They are suitable even for low water heads
All of these

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