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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

2 L.A.N
(2 L.A.N)/60
L.A.N
(L.A.N)/60

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Hydraulics and Fluid Mechanics in ME
In series-pipe problems

the head loss is same through each pipe
a trial solution is not necessary
the discharge through each pipe is added to obtain total discharge
the discharge is same through each pipe

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Hydraulics and Fluid Mechanics in ME
Gradually varied flow is

steady uniform
steady non-uniform
non-steady uniform
non-steady non-uniform

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Hydraulics and Fluid Mechanics in ME
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

0.4
0.83
0.6
0.3

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Hydraulics and Fluid Mechanics in ME
Francis turbine is best suited for

Medium head application from 24 to 180 m
All types of heads
Low head installation up to 30 m
High head installation above 180 m

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

Are identical in shape, but differ only in size
Have identical velocities
Are equal in size and shape
None of these

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