FLUID MECHANICS QUIZ

Terminal velocity is

A fluctuating velocity

A constant velocity with no acceleration

None of these

Attained after moving one-half of total distance

TRUE ANSWER : ?
YOUR ANSWER : ?

Path followed by water jet issuing from the bottom of a water tank will be a

Hyperbola

Horizontal straight line

Zig-zag path (which is geometrically undefined)

Parabola (vertex being at the opening)

TRUE ANSWER : ?
YOUR ANSWER : ?

Interstage coolers are provided in a multistage compressor to

Achieve the exact delivery pressure

Save power in compressing a given volume to a given pressure

None of these

Cool the delivered air

TRUE ANSWER : ?
YOUR ANSWER : ?

Schedule number of a pipe, which is a measure of its wall thickness, is given by

100 P'/S

1000 S/P'

1000 P'/S

10000 P'/S

TRUE ANSWER : ?
YOUR ANSWER : ?

Turbine impeller

Produces only radial current

Produces only tangential current

Is effective over wide range of viscosities

Does not produce tangential current

TRUE ANSWER : ?
YOUR ANSWER : ?

In frictional fluid flow, the quantity, P/ρ + V²/2gc + gz/gc, is

Constant along a streamline

Not constant along a streamline

Increased in the direction of flow

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Square of particle size

Inverse of fluid viscosity

Difference in the densities of the particle & fluid

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Steady flow occurs, when the

Rate of the velocity change is constant

Conditions do not change with time at any point

Conditions change steadily with time

Conditions are the same at the adjacent points at any instant

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of dynamic viscosity in SI unit is

m/N. sec

N/m²

m² /sec

kg/m . sec

TRUE ANSWER : ?
YOUR ANSWER : ?

A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.

10 m

20 m

11 m

12 m

TRUE ANSWER : ?
YOUR ANSWER : ?

↑