HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(L.A.N)/60

(2 L.A.N)/60

2 L.A.N

L.A.N

TRUE ANSWER : ?
YOUR ANSWER : ?

For pipes, turbulent flow occurs when Reynolds number is

less than 2000

more than 4000

between 2000 and 4000

less than 4000

TRUE ANSWER : ?
YOUR ANSWER : ?

Coefficient of velocity is defined as the ratio of

Area of jet at vena contracta to the area of orifice

Actual discharge through an orifice to the theoretical discharge

Actual velocity of jet at vena contracta to the theoretical velocity

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The volume of a fluid __________ as the pressure increases.

None of these

Increases

Remains same

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

A fluid whose viscosity does not change with the rate of deformation or shear strain is known as

Real fluid

Ideal fluid

Non-Newtonian fluid

Newtonian fluid

TRUE ANSWER : ?
YOUR ANSWER : ?

The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R⁴ /1800 t

μ π³ N² R² /3600 t

μ π³ N² R² /1800 t

μ π³ N² R⁴ /3600 t

TRUE ANSWER : ?
YOUR ANSWER : ?

For a body floating in a liquid the normal pressure exerted by the liquid acts at

e.g. of the body

bottom surface of the body

all points on the surface of the body

metacentre

TRUE ANSWER : ?
YOUR ANSWER : ?

For pipes, laminar flow occurs when Roynolds number is

between 2000 and 4000

more than 4000

less than 4000

less than 2000

TRUE ANSWER : ?
YOUR ANSWER : ?

One stoke is equal to

10-3 m2/s

10-2 m2/s

10-6 m2/s

10-4 m2/s

TRUE ANSWER : ?
YOUR ANSWER : ?

The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

0.67 times

0.34 times

0.95 times

0.81 times

TRUE ANSWER : ?
YOUR ANSWER : ?