Question # 1

The irregular and unsteady flow of the fluid is called

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turbulent flow

steady flow

either of them

both of them

The application of Bernoulli's equation is

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Torricelli's theorem

Venture relation

Binomial theorem

Both a and b

The _____ viscous the medium is _____, is the value of terminal velocity of the droplet:

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More, lesser

Lesser, more

Both A and B

Lesser, lesser

The effect of friction between different layers of a flowing fluid is described in terms of

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motion of fluid

nature of fluid

colour of fluid

viscosity of fluid

A body is moving through a viscous medium eventually comes to rest because of:

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Force of gravity

Force of friction

Its weight

Both A and C

At low speeds, the drag force is

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proportional to speed

inversely proportional to speed

not simply proportional to speed

none of them

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

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stethoscope

thermometer

manometer

barometer

Blood pressure is measured by the instrument

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stethoscope

sphygmomanometer

barometer

none of them

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

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More, more

Less, more

Less, less

More, less

Rate of flow can be expressed in

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litre/sec

litre-sec

sec/litre

sec/litre-m

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

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

According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be

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low

zero

high

all of them

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm²will be

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1 cm

2 cm

8 cm

None

N s m^-2is unit of:

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Drag force

Pressure

Surface tension

Coefficient of viscosity

In Bernoulli's theorem the relation between velocity and pressure is

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Inverse

Direct

None of the above

Both a and b

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

Under normal circumstances, the volume of blood is sufficient to keep the vessels

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flatted for all times

inflated for all times

inflated for small times

none of them

Fog droplets are suspended in air when their weight is balanced by:

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Force of gravity

Upward trust due to air

Surface tension

None of these

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

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barometer

speedometer

sphygmomanometer

venture-meter

When the different streamlines cannot cross each other, then this condition is known as

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continuity condition

turbulent flow condition

steady flow condition

none of them

According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area

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decreases

increases

becomes zero

none of them

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 study of fluid in motion basically involves law of conservation of:

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Mass

Energy

Change

Both A and C

Both A and B

Blood pressure is measured in torr. Which of the following units could belong to torr?

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N m^-1

N m^-2

N m

N^-1m^-2

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

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

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Increases

Decreases

Remains constant

None of these

At the starting point of the free fall motion of an object, its acceleration will be

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maximum

minimum

zero

none of them

High speed meteors rushing through air reduces to ashes because of:

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Force of gravity

High resistance of air

Drag force

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

A massive object falls through a fluid:

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Faster

Slower

Slowest

None

Fluid A is more viscous than fluid B. While flowing through a pipe of the same dimensions and material which fluid takes longer to travel at 25°C?

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fluid B

fluid A

both take the same time

not possible to determine from given information

The smooth or steady stream-line flow is know as

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Laminar flow

Turbulent flow

Both a and b

None of the above

Deep water almost runs still when surface water flow in rivers. What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

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

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