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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

lower surface tension
surface tension is no criterion
high density and viscosity
higher surface tension

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Hydraulics and Fluid Mechanics in ME
Kinematic similarity is said to exist between the model and the prototype, if both of them

Have identical forces
Are identical in shape, but differ only in size
Have identical velocities
Are equal in size and shape

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Hydraulics and Fluid Mechanics in ME
A nozzle is generally made of

Convergent shape
Cylindrical shape
Convergent-divergent shape
Divergent shape

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Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

v₁²/2g
v₂²/2g
0.375 v₂²/2g
0.5 v₁²/2g

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-third of the total supply head
One-half of the total supply head
One-fourth of the total supply head
Two-third of the total supply head

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

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

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