HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

The increase of temperature results in

decrease in viscosity of liquid

increase in viscosity of gas

increase in viscosity of liquid

decrease in viscosity of gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The continuity equation is connected with

Conservation of mass

Steady/unsteady flow

Open channel/pipe flow

Compressibility of fluids

TRUE ANSWER : ?
YOUR ANSWER : ?

The power produced by the reaction turbine is ________ to the head of water.

Inversely proportional

Directly proportional

None of these

4th power

TRUE ANSWER : ?
YOUR ANSWER : ?

Reaction turbines are used for

High head and low discharge

Low head and high discharge

High head

Low head

TRUE ANSWER : ?
YOUR ANSWER : ?

The wake

always occurs before a separation point

None of these

always occurs after a separation point

is a region of high pressure intensity

TRUE ANSWER : ?
YOUR ANSWER : ?

For pipes, laminar flow occurs when Reynolds number is

Less than 2000

Less than 4000

More than 4000

Between 2000 and 4000

TRUE ANSWER : ?
YOUR ANSWER : ?

The specific speed (Ns) of a centrifugal pump is given by

(N√Q)/H2/3

(N√Q)/H5/4

(N√Q)/H

(N√Q)/H3/4

TRUE ANSWER : ?
YOUR ANSWER : ?

The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.05 cm

0.40 cm

0.10 cm

0.20 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

The intensity of pressure on an immersed surface __________ with the increase in depth.

Increases

None of these

Does not change

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

Practical fluids

are viscous

possess surface tension

are compressible

possess all the above properties

TRUE ANSWER : ?
YOUR ANSWER : ?

↑