Question # 1

In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is

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Independent of h

Proportional to h^1/2

Proportional to h

Proportional to h²

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

Substances that flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

The density of blood is nearly equal to that of

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mercury

sodium

water

honey

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

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maximum speed

zero speed

maximum speed

none of them

Machine parts are jammed due to:

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Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be

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turbulent

streamline

abrupt

none of them

Viscosity is defined as

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the friction between fluid and its container's walls

the internal friction between two layers of fluid

the resistance to flow a fluid experiences

the extent to which outside factors effect the fluid's flow

The value of viscosity of a fluid is dependent on (at constant temperature)

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the fluid itself

the fluid and its container

anything in contact with the fluid

all of the above

Which of the following has the greatest coefficient of viscosity?

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water

gasoline

honey

tar

A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that

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water contains hydrogen atoms, air does not

water molecules are smaller than molecules in the air

surface tension of the water prevents it from

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

The internal pressure of the blood is

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less than the external atmospheric pressure

greater than the external atmospheric pressure

equal to the external atmosphericpressure

none of them

The resistance offered by a fluid to a solid moving inside it is called:

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Drag force

Surface force

Viscosity

None of these

The unit of viscosity is SI system is:

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Kg^-1m sec^-1

Kgm^-1 sec^-1

Kg^-1m^-1 sec

None of these

A massive object falls through a fluid:

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Faster

Slower

Slowest

None

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