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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Falling drops of water become spheres due to the property of

viscosity
surface tension
cohesion
adhesion

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(W/p) × (a/A)
(p/W) × (A/a)
(W/p) × (A/a)
(p/W) × (a/A)

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.40 cm
0.20 cm
0.05 cm
0.10 cm

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Hydraulics and Fluid Mechanics in ME
In a centrifugal pump casing, the flow of water leaving the

Radial
Vortex
Axial
Centrifugal

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Hydraulics and Fluid Mechanics in ME
A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will

Sink to bottom
Float over fluid
Partly immersed
Be fully immersed with top surface at fluid surface

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Hydraulics and Fluid Mechanics in ME
The wake

always occurs before a separation point
None of these
always occurs after a separation point
is a region of high pressure intensity

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