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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

None of these
More than
Equal to
Less than

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Hydraulics and Fluid Mechanics in ME
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.

The body B is more stable than body A
The bodies A and B have equal stability
The bodies A and B are unstable
The body A is more stable than body B

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is

slightly less
equal
nearly half
slightly more

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Hydraulics and Fluid Mechanics in ME
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is

L/3
L/2
L/4
L

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Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Reynold's number
Froude's number
Weber's number
Euler's number

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηo = ηh × ηm
None of these
ηh = ηo × ηm
ηm = ηm × ηh

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