Question # 1

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

Surface tension of water is reduced by adding

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Detergents

Camphor

Plastic

Both A and B

A device used to measure the speed of liquid flow is known as

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barometer

speedometer

sphygmomanometer

venture-meter

The pressure will change in the pipe, as the fluid moves through that pipe of varying

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cross-section

height

none of them

both 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

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

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

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 direction of the streamlines is the same as the direction of the

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force

torque

velocity

weight

At high speed, fluid friction _____ and fuel consumption ___,:

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Increases, decreases

Increases, increases

Decreases, increases

None of these

A flowing liquid possess

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K.E

P.E

Pressure Energy

All

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

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

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

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increases

decreases

becomes zero

is conserved

The term Brownian movement refers to

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irregular motions of small particles suspended in a fluid

convection currents in a liquid or gas

convection currents in a gas but not in a liquid

the stretching of a body beyond its elastic limit

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

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