FLUID MECHANICS QUIZ

Steady flow occurs, when the

Conditions do not change with time at any point

Conditions are the same at the adjacent points at any instant

Rate of the velocity change is constant

Conditions change steadily with time

TRUE ANSWER : ?
YOUR ANSWER : ?

Plunger pumps are used for

None of these

Higher pressure

Slurries

Viscous mass

TRUE ANSWER : ?
YOUR ANSWER : ?

Euler's equation of motion is a statement expressing

Newton's first law of motion

Conservation of mass

Newton's second law of motion

Conservation of energy

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The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the

All of these

Square of particle size

Inverse of fluid viscosity

Difference in the densities of the particle & fluid

TRUE ANSWER : ?
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Foot valves are provided in the suction line of a centrifugal pump to

Minimise the fluctuation in discharge

Remove the contaminant present in the liquid

Avoid priming, every time we start the pump

Control the liquid discharge

TRUE ANSWER : ?
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Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.

0.1

0.001

0.01

1

TRUE ANSWER : ?
YOUR ANSWER : ?

The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)

x/2

2x

πx

x

TRUE ANSWER : ?
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What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?

1.5

1

0.5

2

TRUE ANSWER : ?
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Cd is always __________ Cc.

Greater than

Less than

Equal to

Either more or less than

TRUE ANSWER : ?
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A centrifugal pump is called a turbine pump, if it is having a

Turbine type impeller

None of these

Rotating vaned volute

Vaned diffusion casing

TRUE ANSWER : ?
YOUR ANSWER : ?

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