Question # 1

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

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

The maximum drag force on a falling sphere is 9.8 N, it weight is

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1 N

9.8 N

4.9 N

Cannot be calculated

The analysis of fluid motion becomes simplified by using

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law of conservation

law of conservation of energy

both of them

none of them

When the speed of a body in a fluid increases then the drag force

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decreases

becomes zero

increases

non of them

The fluid which is incompressible and non viscous is called

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Ideal fluid

Non-ideal fluid

Prefect fluid

All

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

Where the streamlines are very close to each other, the pressure will be

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low

zero

high

all of them

Glycerin has viscosity _____ the viscosity of water:

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More than

Equal to

Less than

None of these

An object moving through a fluid experiences a retarding force called a

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frictional force

terminal force

opposing force

drag force

What are the SI base units of the coefficient of viscosity

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Kg m s^-2

kgm² s^-2

Kg m s^-1

kg m^-1s^-1

Fluid friction is _____ the friction between two solid surfaces:

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Greater than

Smaller than

Equal to

None of these

The smooth or steady streamline flow is known as

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laminar flow

turbulent flow

both of them

none of them

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

Rate of flow can be expressed in

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litre/sec

litre-sec

sec/litre

sec/litre-m

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

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Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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