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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers
Question # 1
Substances that do not flow easily have
Choose an answer
large coefficient of viscosity
small coefficient of viscosity
either of them
none of them
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Question # 2
The electrical forces between the molecules of a liquid are
Choose an answer
Repulsive
Attractive
Both A and B
None
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Question # 3
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
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Question # 4
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
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Question # 5
When a water droplet falling freely through air, the drag force on water droplet increases with th
Choose an answer
decrease in speed
increase in speed
pressure
none of them
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Question # 6
With the increase of temperature viscosity
Choose an answer
Increase
Decrease
Remains same
Doubles
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Question # 7
Which of the following options correctly states the equation of continuity for an ideal fluid?
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A
1
A
2
= V
1
V
2
A
1
/A
2
= V
2
/V
1
A
1
/A
2
= V
1
/V
2
none of the above
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Question # 8
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 # 9
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 # 10
The irregular and unsteady flow of the fluid is called
Choose an answer
turbulent flow
steady flow
either of them
both of them
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Question # 11
0.10 cm can be written as:
Choose an answer
1.0 x 10
-2
m
1.0 x 10
-3
cm
1.0 x 10
-4
cm
1. x 10
-4
m
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Question # 12
Where the streamlines are very far apart from each other, the pressure will be
Choose an answer
low
zero
high
all of them
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Question # 13
The application of Bernoulli's equation is
Choose an answer
Torricelli's theorem
Venture relation
Binomial theorem
Both a and b
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Question # 14
A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m
3
during its steady flow
Choose an answer
1.3 m/s
1.6 m/s
1.9 m/s
2.2 m/s
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Question # 15
An object moving through a fluid experiences a retarding force called a
Choose an answer
frictional force
terminal force
opposing force
drag force
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Question # 16
Bernoulli's equation is based upon law of conversation of
Choose an answer
mass
momentum
Energy
None
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