Question # 1

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

A massive object falls through a fluid:

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Faster

Slower

Slowest

None

Stock's law holds for:

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Motion through free space

Motion through viscous medium

Bodies of all shapes

None of these

The SI unit of viscosity is

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kg m^-1s^-1

kg ms^-1

kg m^-1s^-2

kg m^-1s

Substances that flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

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F_D-mg

Zero

mg-F_D

None of these

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

When each particle of the fluid moves along a smoth path, this path is known as

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straight path

smooth path

haphazard path

steamline

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms^-1then velocity at second cross-section is

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5000 cms^-1

500 cms^-1

50 cms^-1

0.5 cm/s

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none 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

Substances that do not flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

The un-steady streamline flow is called

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laminar flow

turbulent flow

both of them

none of them

Liquids and gasses have

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zero viscosity

non-zero viscosity

very large viscosity

very small viscosity

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