Question # 1

Surface tension of water is due to

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Inter molecular attractions

Inter molecular spaces

Inter molecular repulsion

None of above

A massive object falls through a fluid:

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Faster

Slower

Slowest

None

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

A high concentration of red blood cells increases its viscosity from

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3 - 5 times that of mercury

5 - 8 times that of mercury

3 - 5 times that of water

5 - 8 times that of water

According to the Bernoulli's theorem the pressure velocity are

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equal to each other

proportional to each other

inversely proportional to each other

none of them

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

When a fluid is in motion, its flow can be considered as

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turbulent

streamline

either or them

neither of them

Bernoulli's equation is the fundamental equation in fluid dynamics, which relates pressure to fluid

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speed

height

none of them

both of them

The terminal velocity of water droplet of radius 1 x 10^-4m and desity 1000 kg m^-3descending through air of viscosity 19 x 10^-6kg. m^-1s^-1is

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2.5 ms^-1

3.2 ms^-1

4.3 ms^-1

1.1 ms^-1

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

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

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Increases

Decreases

Remains constant

None of these

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

Which of the following options correctly states the equation of continuity for an ideal fluid?

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A₁A₂= V₁V₂

A₁/A₂= V₂/V₁

A₁/A₂= V₁/V₂

none of the above

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 SI unit of viscosity is

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kg m^-1s^-1

kg ms^-1

kg m^-1s^-2

kg m^-1s

The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is called

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constant rate

volume rate

flow rate

steady rate

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