HYDRAULICS & FLUID MECHANICS QUIZ

The difference of pressure between the inside and outside of a liquid drop is

(d)p = 2T/r

(b)p = T/r

(a)p = Txr

p = T/2r

TRUE ANSWER : ?
YOUR ANSWER : ?

A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 : 2.5

1 : 5

1 :25

1:50

TRUE ANSWER : ?
YOUR ANSWER : ?

The surface tension of mercury at normal temperature compared to that of water is

same

more

less

more or less depending on size of glass tube

TRUE ANSWER : ?
YOUR ANSWER : ?

In a Sutro weir, the discharge is proportional to (where H is head)

H3/2

H

H1/2

H5/2

TRUE ANSWER : ?
YOUR ANSWER : ?

SURFACE TENSION HAS THE UNITS OF

NEW TONS/M

NETON/M

NEWTONS/M

NEWTONS

TRUE ANSWER : ?
YOUR ANSWER : ?

Steady flow occurs when

the direction and magnitude of the velocity at all points are identical

the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

the magnitude and direction of the velocity do not change from point to point in the fluid

the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

TRUE ANSWER : ?
YOUR ANSWER : ?

A fluid is said to be ideal, if it is

inviscous and compressible

inviscous

inviscous and incompressible

incompressible

TRUE ANSWER : ?
YOUR ANSWER : ?

The region between the separation streamline and the boundary surface of the solid body is known as

lift

wake

boundary layer

drag

TRUE ANSWER : ?
YOUR ANSWER : ?

A perfect gas

is incompressible

None of these

is of theoretical interest

has constant viscosity

TRUE ANSWER : ?
YOUR ANSWER : ?

The discharge through a V- notch varies as

H3’2

H5/2

H1/2

H5’4 where H is head.

TRUE ANSWER : ?
YOUR ANSWER : ?