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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers
Question # 1
In Bernoulli's theorem the relation between velocity and pressure is
Choose an answer
Inverse
Direct
None of the above
Both a and b
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Question # 2
The blood pressure of a person
Choose an answer
decrease with age
increase with age
has no effect with age
none of them
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Question # 3
One torr is equal to
Choose an answer
13.33 N/m
2
760 N/m
2
760 mm Hg
133.3 N/m
2
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Question # 4
Under normal circumstances, the volume of blood is sufficient to keep the vessels
Choose an answer
flatted for all times
inflated for all times
inflated for small times
none of them
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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
According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be
Choose an answer
low
zero
high
all of them
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Question # 7
The drag force acting on a spherical droplet of radius 10
-5
m moving with a velocity of 1 cm/sec in a fluid of velocity 5.31 x 10
-7
m/sec. The units comes out to be:
Choose an answer
10
-16
N
10
-14
N
10
-12
N
10
-10
N
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Question # 8
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 # 9
According to the Bernoulli's theorem the pressure velocity are
Choose an answer
equal to each other
proportional to each other
inversely proportional to each other
none of them
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Question # 10
Rate of flow can be expressed in
Choose an answer
litre/sec
litre-sec
sec/litre
sec/litre-m
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Question # 11
The un-steady streamline flow is called
Choose an answer
laminar flow
turbulent flow
both of them
none of them
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Question # 12
A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that
Choose an answer
water contains hydrogen atoms, air does not
water molecules are smaller than molecules in the air
water molecules are smaller than molecules in the air
surface tension of the water prevents it from
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Question # 13
The term Brownian movement refers to
Choose an answer
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
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Question # 14
Bernoulli's equation is based upon law of conservation
Choose an answer
Mass
Momentum
Energy
None of these
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Question # 15
According to Stoke's law, drag force depends on
Choose an answer
Initial velocity
Final velocity
Terminal velocity
Instantaneous velocity
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Question # 16
The analysis of fluid motion becomes simplified by using
Choose an answer
law of conservation
law of conservation of energy
both of them
none of them
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