Question # 1

Bernoulli's equation is based upon law of conversation of

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mass

momentum

Energy

None

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

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

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

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

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

Which of the following has the greatest coefficient of viscosity?

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water

gasoline

honey

tar

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

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

The velocity of falling raindrops attains limited value because of

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Up thrust of air

Air currents of the earth atmosphere

Surface tension effect

Viscous force exerted by air

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

When a water droplet falls through air, the net force on it is

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Net force = drag force - weight

Net force = weight - drag force

Net force = drag force + weight

Net force = weight + drag force

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

Internal friction of fluid is called

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Surface tension

Viscosity

Resistance

Cohesive force

In deriving the Bernoulli's equation, we assume that the fluid is

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incompressible

no viscous

flows in a steady manner

all of them

Bernoulli's equation is important in the field of

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Electrical circuit

Magnetism

Photoelectric effect

Flow of fluids

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

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