Question # 1

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

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Increases, decreases

Increases, increases

Decreases, increases

None of these

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

The application of Bernoulli's equation is

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Torricelli's theorem

Venture relation

Binomial theorem

Both a and b

If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity

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v/A = constant

A/v = constant

Av = constant

None

The smooth or steady streamline flow is known as

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laminar flow

turbulent flow

both of them

none of them

Surface tension of water is reduced by adding

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Detergents

Camphor

Plastic

Both A and B

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

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Zero

Small

Large

None of these

If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term

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P

1/2 fv²

pgh

none of them

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

Bernoulli's equation is based upon law of conversation of

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mass

momentum

Energy

None

Pressure exerted by a gas on the walls of its container in due to

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adhesion between the gas molecules and the container

cohesion between the gas molecules and the container

collision between the gas molecules and the container

surface tension of the gas

The velocity of falling raindrop attains limited value because of

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Up trust of air

Viscous force exerted by air

Surface tension effect

Air currents atmosphere

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

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tnesion

One torr is equal to

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13.33 N/m²

760 N/m²

760 mm Hg

133.3 N/m²

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

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Decreases

Increases

Remains same

Zero

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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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