Question # 1

Viscosity will be maximum when

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Water is at 20 ^oC

Honey is at 20 ^oC

Water is at 100 ^oC

Milk is at 100 ^oC

How much would be the volume of ice formed by freezing 1 litre of water.

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1.0 litre

1.09 litre

1.90 litre

2.0 litre

If each particle of the fluid passing through a point follows the same path then flow is said to be

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Regular flow

Irregualr flow

Turbulent flow

Streamline flow

A tank 3 m long 1 m wide and 0.5 m deep is filled with oil which weight 12,000 N . The pressure on the base of the tank due to oil is.

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1,000 Pa

4,000 Pa

3,000 Pa

6,000 Pa

A bodybuilders uses a chest expander with five springs it takes a force of 20 N to Pallone spring out by 15 cm how much force will be needed to extend the expander by 15 cm.

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50 N

75 N

150 N

1000 N

The dimensions of stress are

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[MLT-1]

[ML-1 T]

[ML-1T-1]

[ML-1T-2]

The pulsating outflow of blood from the heart by alternate systole and diastole is smoothed out by

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The blocking action of the heart's valves

The viscosity of the blood

The effect of gravity

the elasticity of the blood vessels

Viscosity of fluids with rise in temperature.

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Increases

Decreases

Remains constant

Vanishes

A fluid is said to be ideal if it is

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Non viscous

Non viscous and incompressible

Non viscous and with steady flow

Non viscous incompressible and has steady flow

A boat loving at constant speed 'v' through still water experiences a total frictional drag F what is the power developed by the boat.

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1/2 Fv

Fv

1/2 Fv2

Fv2

Soap cleans the dirty clothes because.

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Its chemical constituents are changed

Itr increases the surface tension of its solution with water

It increases the surface tension of its solution with water

It is less dense than that of water

The viscosity of an ideal fluid is

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Infinity

Unity

Zero

0.5

A fundamental equation in fluid dynamics that relates pressure to fluid speed and height is.

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Equation of continuity

Bernoulli's equation

Stoke's equation

Mass energy eqation.

The extension produced in a sample of material depends upon

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Nature of the material

Stretching force

Cross range order

All of the above

The force that moves a rocket or a plane forward is called.

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Lift

drag

Thrust

Turbulence

The word amorphous means

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With regular structure

Without structure

May have regular structure

Thermoplastics

Any alternations product in shape length of volume where a body is subjected to some external force is called

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Deformation

Polymerization

Crystallization

Elasticity

A tin film of liquid is enclosed between two glass plates it is difficult to spates the plates on account of.

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Surface tension

Atmospheric pressure

Viscosity

Friction

The buoyancy depends upon the

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Depth to which the body is immersed

Shape of the body

Mass of the body

Mass of the liquid displaced

A force of 10 N acting on a certain spring produces an extension of 40 mm Two such spring are connected end to end and this double length spring is extended by 40 mm What is the strain energy.

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0.05 J

0.10 J

0.20 J

0.40 J

Which of the substances is the lightest one.

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Copper

Mercury

Aluminium

Lead

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