Question # 1

The internal pressure of the blood is

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less than the external atmospheric pressure

greater than the external atmospheric pressure

equal to the external atmosphericpressure

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

Which of the following has the greatest coefficient of viscosity?

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water

gasoline

honey

tar

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

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

Viscosity is defined as

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the friction between fluid and its container's walls

the internal friction between two layers of fluid

the resistance to flow a fluid experiences

the extent to which outside factors effect the fluid's flow

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

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potential energy

pressure energy

strain energy

(a) and (b) only

N s m^-2is unit of:

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Drag force

Pressure

Surface tension

Coefficient of viscosity

The property of fluids due to which they resist their own flow is called:

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Drag force

Surface tension

Viscosity

None of these

The direction of the streamlines is the same as the direction of the

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force

torque

velocity

weight

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

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

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

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Decreases

Increases

Remains same

Zero

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none of them

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm², the fluid pressure on the piston is, in N/cm²

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20

200

2000

20,000

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

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