Question # 1

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

The word amorphous means

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With regular structure

Without structure

May have regular structure

Thermoplastics

The maximum stress a solid material can sustain with out undergoing permanent deformation is called.

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elastic limit

Plastic

elastic deformation

Plastic deformation

Molecules of a liquid

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Do not vibrate about their mean position

Are rigidly held with each other

Have weak attractive forces

Have strong attractive forces

The SI unit of stress is

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kg m s-2

kg m-1 s-2

N m-2

N m-1

Surface tension of a liquid may be defined as

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Heat energy per unit area

P.E. per unit area

surface energy per unit area

K.E. per unit area

Reversible alternation of the form of dimensions of a solid body under stress and strain is called.

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elastic limit

Plastic limit

elestic deformation

Plastic deformation

The product of velocity and cross sectional are for a liquid flowing through a pipe is a measure of the.

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Rate of flow

Volume of fluid

Fluid pressure

Fluid friction

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

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

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

Solids have

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Fixed shape only

Fixed volume only

Fixed shape and volume

No fixed shape and volume

Plasma exists in

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Electric bulbs

Tube light

Energy savers

Fluorescent tubes

A spring obeying Hooke's law has an upstretched length 50 mm and a spring constant of 400 N m-1 What is the tension in the spriing when its overall length is 70 mm.

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8 N

28 N

160 N

400 N

Which of the following is mechanical property of a material.

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Strength

Stiffness

Ductility

All of these

When the deforming force applied on a body produces change in shape, thenit is said t be

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Tensile stress

Compression stress

Shear stress

Shear modulus

High concentration of red blood cells increases the viscosity of blood from

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2 -3 time's that of water

3-4 times that of water

3 - 5 times that of water

4 -5 times that of water

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 dimensions of stress are

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[MLT-1]

[ML-1 T]

[ML-1T-1]

[ML-1T-2]

The product of cross sectional area of the pipe and the fluid velocity at any point along the pipe is equal to.

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Zero

Flow rate

A constant

A varibale

In which one of the following states molecules do net leavt their position.

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Solid

Liquid

Gas

Plasma

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