Question # 1

A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is

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50 m/s

20 m/s

40 cm/s

5 cm/s

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

In case of streamed lined flow of liquid, the loss of energy is

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Maximum

Minimum

Infinite

equal to what is in turbulent flow

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

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Increases, decreases

Increases, increases

Decreases, increases

None of these

During the steady flow, different streamlines

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cannot across each other

can across each other

either of them

neither of them

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

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low

zero

high

all of them

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

Unit of viscosity is:

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Kg m^-1sec^-1

N s m^-2

J s m^-3

All 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

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 flow of an ideal fluid is

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streamline flow

incompressible flow

non-viscous

all of the above

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

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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Is smaller than

Is greater than

Becomes equal to

None of these

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 density of water is 10³kg/m³. The water pressure on a submarine is 2.0 x 10⁷N/m². The depth of the submarine below the surface of the water, in maters, is approximately

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200 m

11000 m

2000 m

8000 m

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