HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

difference of pressure between two points

very low pressure

pressure in pipes, channels etc

atmospheric pressure

0.15

0.05

0.2

0.1

The pressure above the nappe is negative

The pressure above the nappe is atmospheric

The pressure below the nappe is negative

The pressure below the nappe is atmospheric

Bernoulli’s theorem

Pascal’s law

Archimedes’s principle

Principle of flotation

0.688

0.392

0.492

0.848

decreases

remains unaffected

increases

unpredictable

0.567

0.7666

0.6667

0.5

Actual velocity of jet at vena-contracta to the theoretical velocity

Actual discharge through an orifice to the theoretical discharge

Loss of head in the orifice to the head of water available at the exit of the orifice

Area of jet at vena-contracta to the area of orifice

x2 + y2

x2y

cosx

x2-y2

Velocity of runner at inlet to the velocity of flow at inlet

Theoretical velocity of jet to the velocity of flow at inlet

None of these

Velocity of flow at inlet to the theoretical jet velocity