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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow ratio in case of Francis turbine varies from

0.15 to 0.3
0.6 to 0.9
1 to 1.5
0.4 to 0.5

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body is called

upthrust
all the above are correct
buoyancy
center of pressure

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

Weber's number
Froude's number
Mach number
Reynold's number

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Hydraulics and Fluid Mechanics in ME
The center of pressure of a surface subjected to fluid pressure is the point

at which all hydraulic forces meet
similar to metacentre
on the surface at which gravitational force acis
on the surface at which resultant pres-sure acts

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Hydraulics and Fluid Mechanics in ME
Alcohol is used in manometers because

It has low surface tension
It has low vapour pressure
It can provide longer column due to low density
It is clearly visible

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

9.81 kN/m3
9.81 × 103 N/m3
Any one of these
9.81 × 10-6 N/mm3

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