Question # 1

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

Liquids and gasses have

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zero viscosity

non-zero viscosity

very large viscosity

very small viscosity

Blood vessels can be stretch like rubber, therefore they are

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rigid

hard

very thick

not rigid

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

Drag force increases if speed of the object moving through the fluid:

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Increases

Decreases

Remains constant

None of these

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none of them

According to Stoke's law, drag force depends on

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Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called

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incompressible

compressible

viscous

non viscous

Pressure exerted by a gas on the walls of its container in due to

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adhesion between the gas molecules and the container

cohesion between the gas molecules and the container

collision between the gas molecules and the container

surface tension of the gas

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

When a fluid is in motion, its flow can be considered as

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turbulent

streamline

either or them

neither of them

One torr is equal to

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13.33 N/m²

760 N/m²

760 mm Hg

133.3 N/m²

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

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R

R²

1/R

(1/R)²

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

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Streamline, cannot

Turbulent, cannot

Streamline, can

None of these

Viscosity of water is ______ that of air but ___ that of plasma.

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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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