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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called
Options
A. surface tension
B. compressibility
C. capillarity
D. viscosity
Correct Answer
viscosity
Hydraulics and Fluid Mechanics problems
Search Results
1. Newton's law of viscosity is a relationship between
Options
A. pressure, velocity and temperature
B. shear stress and rate of shear strain
C. shear stress and velocity
D. rate of shear strain and temperature
Show Answer
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Discuss
Correct Answer: shear stress and rate of shear strain
2. In a lockgate, the reaction between two gates is (where
P
= Resultant pressure on the lock gate, and ? = Inclination of the gate with the normal to the side of the lock)
Options
A.
B.
C. P / 2sin?
D.
Show Answer
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Correct Answer: P / 2sin?
3. The magnitude of water hammer depends upon the
Options
A. elastic properties of the pipe material
B. elastic properties of the liquid flowing through the pipe
C. speed at which the valve is closed
D. all of the above
Show Answer
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Correct Answer: all of the above
4. The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.
Options
A.
below
B.
above
C.
below
D.
above
Show Answer
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Correct Answer:
below
5. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
Options
A. weir
B. notch
C. orifice
D. none of these
Show Answer
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Correct Answer: notch
6. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.
Options
A. True
B. False
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Correct Answer: True
7. A flow is called super-sonic if the
Options
A. velocity of flow is very high
B. discharge is difficult to measure
C. Mach number is between 1and 6
D. none of these
Show Answer
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Correct Answer: Mach number is between 1and 6
8. When the venturimeter is inclined, then for a given flow it will show __________ reading.
Options
A. same
B. more
C. less
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Discuss
Correct Answer: same
9. The specific weight is also known as weight density.
Options
A. Correct
B. Incorrect
Show Answer
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Correct Answer: Correct
10. The specific weight of compressible fluids does not remain constant.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
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