Question # 1

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

Which of the following has the greatest coefficient of viscosity?

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water

gasoline

honey

tar

When a water droplet falling freely through air, the drag force on water droplet increases with th

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decrease in speed

increase in speed

pressure

none of them

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

The pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

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125 J

90 J

160 J

85 J

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

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

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

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Increases, decreases

Increases, increases

Decreases, increases

None of these

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

During the steady flow, different streamlines

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cannot across each other

can across each other

either of them

neither of them

0.10 cm can be written as:

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1.0 x 10^-2m

1.0 x 10^-3cm

1.0 x 10^-4cm

1. x 10^-4m

According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be

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low

zero

high

all of them

Stock's law holds for:

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Motion through free space

Motion through viscous medium

Bodies of all shapes

None of these

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

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

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

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