FLUID MECHANICS QUIZ

Cavitation in a centrifugal pump can be avoided by keeping the

Inlet pressure high

Inlet pressure low

Outlet pressure low

Outlet pressure high

TRUE ANSWER : ?
YOUR ANSWER : ?

Prandtl mixing length is

None of these

A universal constant

Applicable to laminar flow problems

Zero at the pipe wall

TRUE ANSWER : ?
YOUR ANSWER : ?

Purpose of relief valve in a reciprocating pump is to

Protect the pump against developing excessive pressure

Reduce the discharge pressure

Control the rate of discharge

Facilitate unidirectional flow of liquid

TRUE ANSWER : ?
YOUR ANSWER : ?

The continuity equation

Relates mass flow rate along a stream tube

Relates work and energy

Stipulates that Newton's second law of motion must be satisfied at every point in the fluid

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)

10

1

0.01

0.1

TRUE ANSWER : ?
YOUR ANSWER : ?

Rubber latex is an example of a __________ .fluid.

Dilatent

Bingham plastic

Pseudoplastic

Newtonion

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of

Friction co-efficient for flows at equal Reynold number

All of these

Absolute roughness

Relative roughness

TRUE ANSWER : ?
YOUR ANSWER : ?

In an incompressible flow of fluid, the fluid

Temperature remains constant

Is frictionless

Compressibility is greater than zero

Density does not change with pressure & temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Velocity at a certain point in case of streamline flow is

Independent of time

Both A & B

Neither A nor B

Constant

TRUE ANSWER : ?
YOUR ANSWER : ?

Cp/Cv is termed as

Adiabatic constant

Prandtl number

Mach number

Weber number

TRUE ANSWER : ?
YOUR ANSWER : ?