HYDRAULICS & FLUID MECHANICS QUIZ

Least possible value of correction factor for i) kinetic energy is zero ii) kinetic energy is 1 iii) momentum is zero iv) momentum is 1 The correct statements are

(i) and (iv)

(ii) and (iv)

(ii) and (iii)

(i) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

Metacentric height is given as the distance between

the center of gravity of the body and the center of buoyancy

the center of gravity of the body andthe meta center

the center of gravity of the body and the center of pressure

center of buoyancy and metacentre

TRUE ANSWER : ?
YOUR ANSWER : ?

The Prartdtl mixing length is

None of these

independent of shear stress

zero at the pipe wall

maximum at the pipe wall

TRUE ANSWER : ?
YOUR ANSWER : ?

Specific weight of sea water is more that of pure water because it contains

All of these

dissolved air

suspended matter

dissolved salt

TRUE ANSWER : ?
YOUR ANSWER : ?

The density of water is 1000 kg/m3 at

20°C

0°C

4°C

0°K

TRUE ANSWER : ?
YOUR ANSWER : ?

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

less

same

more or less depending on size of glass tube

more

TRUE ANSWER : ?
YOUR ANSWER : ?

Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the

force of diffusion

force of friction

force of adhesion

force of cohesion

TRUE ANSWER : ?
YOUR ANSWER : ?

If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

160

less than 1

200

between 1 and 100

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following the friction drag is generally larger than pressure drag?

an airfoil

a sphere

a circular disc or plate held normal to flow

a cylinder

TRUE ANSWER : ?
YOUR ANSWER : ?

An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

10.2/m sec

9.81 m/sec²

9.75 m/sec²

10m/sec²

TRUE ANSWER : ?
YOUR ANSWER : ?