4

Surface tension

Compressibility

Capillarity

Viscosity

D. Viscosity

4

Cohesion

Viscosity

Compressibility

4

# A fluid which obeys the Newton's law of viscosity is termed as

Real fluid

Ideal fluid

Newtonian fluid

Non-Newtonian fluid

4

200 kg/m3

400 kg/m3

600 kg/m3

800 kg/m3

4

# A body floats in stable equilibrium

When its meatcentric height is zero

When the metacentre is above C.G.

When its e.g. is below its center of buoyancy

Metacentre has nothing to do with position of e.g. for determining stability

4

Gas law

Boyle's law

Charles law

Pascal's law

4

# Dynamic viscosity of most of the gases with rise in temperature

Increases

Decreases

Remain unaffected

Unpredictable

4

N-m/s

N-s/m2

m2/s

N-m

4

Cohesion

Viscosity

Surface tension

4

# Alcohol is used in manometers because

It has low vapour pressure

It is clearly visible

It has low surface tension

It can provide longer column due to low density

4

# Differential manometer is used to measure

Pressure in pipes, channels etc.

Atmospheric pressure

Very low pressure

Difference of pressure between two points

4

# A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2A√H₁)/(Cd × a√2g)

(2AH₁)/(Cd × a√2g)

(2AH₁3/2)/(Cd × a√2g)

(2AH₁²)/(Cd × a√2g)

4

Inertia force

Viscous force

Gravity force

All of these

4

0.83

0.6

0.4

0.3

4

w × Q × H

w × Q × hf

w × Q (H - hf)

w × Q (H + hf)

4

# A fluid having no viscosity is known as

Real fluid

Ideal fluid

Newtonian fluid

Non-Newtonian fluid

4

Orifice

Notch

Weir

Dam

4

Orifice plate

Venturimeter

Rotameter

Pitot tube

4

# Dynamic viscosity of most of the liquids with rise in temperature

Increases

Decreases

Remain unaffected

Unpredictable

4

1 and 2.5

2.5 and 4

4 and 6

1 and 6

4

Sum

Difference

Arithmetic mean

Geometric mean

4

# Froude's number is the ratio of inertia force to

Pressure force

Elastic force

Gravity force

Surface tension force

4

0.0116 stoke

0.116 stoke

0.0611 stoke

0.611 stoke

4

Laminar flow

Turbulent flow

4

# Surface tension

Acts in the plane of the interface normal to any line in the surface

Is also known as capillarity

Is a function of the curvature of the interface

Decreases with fall in temperature

4

h

wh

w/h

h/w

4

# The meatcentric height is the distance between the

Centre of gravity of the floating body and the centre of buoyancy

Centre of gravity of the floating body and the metacentre

Metacentre and centre of buoyancy

Original centre of buoyancy and new centre of buoyancy

4

# The tangential velocity of the water element having a free vortex is

Directly proportional to its distance from the centre

Inversely proportional to its distance from the centre

Directly proportional to its (distance)2 from the centre

Inversely proportional to its (distance)2 from the centre

4

# When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

Remains horizontal

Becomes curved

Falls on the front end

Falls on the back end

4

0.46

0.64

0.78

0.87