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Fluid Mechanics

Fluid Mechanics
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.

Total
Static
Manometric
Friction

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Fluid Mechanics
The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.

Transition
Prandtl mixing
Equivalent
None of these

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Fluid Mechanics
The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop fo __________ fluid.

Pseudoplastic
Dilatant
Newtonion
Bingham plastic

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Fluid Mechanics
The normal stress is the same in all directions at a point in a fluid, when the fluid is

Having no motion of one fluid layer relative to the other
Both A and B
Non-viscous
Incompressible

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Fluid Mechanics
The ratio of inertial forces to elastic forces is called the __________ number.

Reynolds
Mach
Euler
Weber

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Fluid Mechanics
The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.

736.4
1.8
12.4
186.2

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