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Online Tests
ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers
Question # 1
Stock's law holds for:
Choose an answer
Motion through free space
Motion through viscous medium
Bodies of all shapes
None of these
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Question # 2
In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.
Choose an answer
Streamline, cannot
Turbulent, cannot
Streamline, can
None of these
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Question # 3
When the different streamlines cannot cross each other, then this condition is known as
Choose an answer
continuity condition
turbulent flow condition
steady flow condition
none of them
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Question # 4
At high altitude the blood oozes out of the nose and ear because
Choose an answer
The blood pressure increase at high altitudes
The percentage of oxygen in the air increase
The atmospheric pressure decrease there
The density of blood decrease at high altitudes
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Question # 5
If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be
Choose an answer
turbulent
streamline
abrupt
none of them
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Question # 6
The internal pressure of the blood is
Choose an answer
less than the external atmospheric pressure
greater than the external atmospheric pressure
equal to the external atmosphericpressure
none of them
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Question # 7
Which of the following options states the names of fluids in the order of increasing viscosity?
Choose an answer
mercury, motor oil, methanol
methanol, mercury, motor oil
motor oil, mercury, methanol
methanol, motor oil, mercury
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Question # 8
Stoke;s law is not applicable when the speed of the object moving through a fluid is:
Choose an answer
Zero
Small
Large
None of these
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Question # 9
At the starting point of the free fall motion of an object, its acceleration will be
Choose an answer
maximum
minimum
zero
none of them
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Question # 10
The unit of viscosity is SI system is:
Choose an answer
Kg
-1
m sec
-1
Kgm
-1
sec
-1
Kg
-1
m
-1
sec
None of these
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Question # 11
A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms
-1
then velocity at second cross-section is
Choose an answer
5000 cms
-1
500 cms
-1
50 cms
-1
0.5 cm/s
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Question # 12
With increase of temperature, the viscosity of liquid and gases
Choose an answer
Increases for both
Decreases for both
Increases for liquids and decreases for gases
Decreases for liquids and increases for gases
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Question # 13
The body will move with terminal velocity when it acquires
Choose an answer
minimum speed
zero speed
maximum speed
none of them
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Question # 14
Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to
Choose an answer
Increase the mass of water flowing per second
Avoid wastage of water
Increase the velocity of water flowing out
Increase the volume of water flowing per second
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Question # 15
The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is
Choose an answer
very high
very low
constant
zero
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Question # 16
The pressure will change in the pipe, as the fluid moves through that pipe of varying
Choose an answer
cross-section
height
none of them
both of them
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