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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem

All of these
pitot tube
Orifice plate
Venturimeter

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Hydraulics and Fluid Mechanics in ME
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

Less than
None of these
Equal to
More than

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Hydraulics and Fluid Mechanics in ME
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be

2 metres of water column
4 m of water column
3.5 metres of water column
3 metres of water column

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Hydraulics and Fluid Mechanics in ME
For starting an axial flow pump, its delivery valve should be

Depends on starting condition and flow desired
Closed
Open
Could be either open or closed

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Hydraulics and Fluid Mechanics in ME
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

1/8 to 1/4
1/3 to 1/2
1/16 to 1/8
1/4 to 1/3

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe is turbulent when Reynold number is

Between 2000 and 2800
None of these
Less than 2000
More than 2800

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