Question # 1

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

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

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

Where the streamlines are very far apart from each other, the pressure will be

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low

zero

high

all of them

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

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R

R²

1/R

(1/R)²

The term Brownian movement refers to

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irregular motions of small particles suspended in a fluid

convection currents in a liquid or gas

convection currents in a gas but not in a liquid

the stretching of a body beyond its elastic limit

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 application of Bernoulli's equation is

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Torricelli's theorem

Venture relation

Binomial theorem

Both a and b

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

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 dimensions of viscosity are:

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M²L^-1T^-2

M^-1L¹T^-1

M^-1L^-1T

ML^-1T^-1

Density of fluid is defined as:

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Its volume to mass ratio

Product of volume and mass

Its mass of volume ratio

None of these

When the different streamlines cannot cross each other, then this condition is known as

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continuity condition

turbulent flow condition

steady flow condition

none of them

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

In a normal healthy person the value of systolic pressure is

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75 torr

80 torr

120 torr

all of them

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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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