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Online Tests
ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers
Question # 1
A device used to measure the speed of liquid flow is known as
Choose an answer
barometer
speedometer
sphygmomanometer
venture-meter
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Question # 2
If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm
2
will be
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1 cm
2 cm
8 cm
None
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Question # 3
When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called
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incompressible
compressible
viscous
non viscous
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Question # 4
Drag force increases if speed of the object moving through the fluid:
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Increases
Decreases
Remains constant
None of these
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Question # 5
Machine parts are jammed due to:
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Increasing in viscosity of lubricant
Decreasing in viscosity of lubricant
Decreasing in surface tension of lubricant
None of these
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Question # 6
The law of conservation of mass gives us the
Choose an answer
equation of continuity
Bernoulli's theorem
both of them
none of them
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Question # 7
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 # 8
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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Question # 9
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 # 10
Substances that flow easily have
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large coefficient of viscosity
small coefficient of viscosity
either of them
none of them
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Question # 11
When weight of an object falling freely becomes equal to the drag force, then the body will move with
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increasing speed
decreasing speed
constant speed
none of them
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Question # 12
Bernoulli's equation is based upon law of conservation
Choose an answer
Mass
Momentum
Energy
None of these
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Question # 13
The resistance offered by a fluid to a solid moving inside it is called:
Choose an answer
Drag force
Surface force
Viscosity
None of these
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Question # 14
Two copper balls of 1 cm and 2 cm in diameter are simultaneously dropped in the same viscous medium. The terminal velocity of bigger ball is:
Choose an answer
Not affected due to its size
Twice that of small size ball
Four times that of small size ball
1/4th of that of small size ball
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Question # 15
Which of the following has the greatest coefficient of viscosity?
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water
gasoline
honey
tar
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