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Fluid Mechanics

Fluid Mechanics
If the head over the triangular notch is doubled, the discharge will increase by __________ times.

2.828
2
4
5.657

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Fluid Mechanics
Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases.

BHP required by the pump
Head of the liquid pumped
NPSH required
All of these

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Fluid Mechanics
Boiler feed water pump is usually a __________ pump.

Reciprocating
Gear
Multistage centrifugal
Diaphragm

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Fluid Mechanics
Terminal velocity is

A fluctuating velocity
None of these
A constant velocity with no acceleration
Attained after moving one-half of total distance

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Fluid Mechanics
The terminal velocity of a small sphere settling in a viscous fluid varies as the

Inverse square of the diameter
Inverse of the fluid viscosity
First power of its dimeter
Square of the difference in specific weights of solid & fluid

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Fluid Mechanics
The __________ is measured by a piezometric opening.

Point velocity
Dynamic pressure
Total pressure
Static pressure

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