Question # 1

Matter is made up of very tiny particles called

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Atoms

Molecules

Ions

None of these

The un-steady streamline flow is called

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laminar flow

turbulent flow

both of them

none of them

The value for systolic blood pressure for a normal healthy person is

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140 torr

80 torr

90 torr

120 torr

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

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

Blood pressure is measured by the instrument

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stethoscope

sphygmomanometer

barometer

none of them

In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is

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Independent of h

Proportional to h^1/2

Proportional to h

Proportional to h²

Substances that do not flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none 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

Substances that flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

A body is floating in a liquid. The up thrust on the body is

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Equal to weight of liquid displaced

Zero

Less than the weight of liquid displaced

Weight of body-weight of liquid displaced

Which of the following is a characteristic of an ideal fluid?

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it is non-viscous

it is incompressible

it's motion is steady

all of the above

Under normal circumstances, the volume of blood is sufficient to keep the vessels

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flatted for all times

inflated for all times

inflated for small times

none of them

Above a certain velocity of a fluid is called

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turbulent flow

steady flow

either of them

both of them

The SI unit of viscosity is

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kg m^-1s^-1

kg ms^-1

kg m^-1s^-2

kg m^-1s

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

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low

zero

high

all of them

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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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