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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following velocity potentials satisfies continuity equation ?

x2y
x2 + y2
x2-y2
cosx

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Hydraulics and Fluid Mechanics in ME
The unit of dynamic viscosity in S.I. units is

N-s/m²
N-m/s²
Poise
Stoke

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Hydraulics and Fluid Mechanics in ME
A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is

5kN
lOkN
20 kN
15 kN

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Hydraulics and Fluid Mechanics in ME
Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

Both A and B
Internal
None of these
External

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Hydraulics and Fluid Mechanics in ME
A pressure of 25 m of head of water is equal to

2.5 kN/m2
25 kN/m2
245 kN/m2
2500 kN/m2

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Hydraulics and Fluid Mechanics in ME
The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

Slow speed with radial flow at outlet
High speed with radial flow at outlet
Medium speed with radial flow at outlet
High speed with axial flow at outlet

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