Question # 1

The dimensions of strain are.

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[MLT-2]

[ML-1T-2]

[ML-2T-3]

It is a dimensionless quantity

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

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Lift

drag

Thrust

Turbulence

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

The dimensions of stress are

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[MLT-1]

[ML-1 T]

[ML-1T-1]

[ML-1T-2]

Crystalline solids are of.

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Short range order

Long range order

Intermediate range

Plastics

The nib of fountain pan is split of convey ink down the nib by the phenomenon of.

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Adhesion

Cohesion

Osmosis

Capillary

Solids have

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Fixed shape only

Fixed volume only

Fixed shape and volume

No fixed shape and volume

The lowest stress at which strain increases in stress in called.

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elastic limit

Plastic limit

Yield point

Bulk strength

Blood is

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A compressible fluid

an incompressible fluid

Non viscous fluid

Not a fluid

When the deforming force applied on a body produces change in volume then it is said to be

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Tensile stress

Compression stress

Shear stress

Shear modulus

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

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

The air plane lift is based on

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Archimedes principle

Law of conservation of momentum

Bernoulli's principle

Law of conservation of energy

At which temperature surface tension of liquid will be maximum

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0 ^oC

20 ^oC

30 ^oC

100 ^oC

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

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

Highly conducting state of matter is

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Conductors

Plasma

Semiconductors

Insulators

Which liquid can flow easily.

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Traacle

Pitch

Ether

All flow with same rate

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 change in the dimensions of a body produced by the action of the deformation force is known as.

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Strain

Stress

Tensile strain

Tensile stress

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