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Fluid Mechanics

Fluid Mechanics
Medium viscosity lubricating oil can be most ideally pumped by a __________ pump.

Vane
Piston
Centrifugal
Plunger

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Fluid Mechanics
The nominal size of a hose pipe is specified by its

Thickness
I.D.
None of these
O.D.

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Fluid Mechanics
The value of critical Reynolds number for pipe flow is

10000
1300
100000
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
Bingham plastic
Dilatant
Newtonion

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Fluid Mechanics
Design of the casing of centrifugal pump should be such as to minimise the

Back flow through impeller
Loss of static head
None of these
Loss of kinetic head

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Fluid Mechanics
The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation

dq/dx = K
dq/dx = K.q
dq/dx = Kq²
dq/dx = K/q

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