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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
The surface tension of mercury at normal temperature is __________ that of water.
Options
A. same as
B. lower than
C. higher than
Correct Answer
higher than
Hydraulics and Fluid Mechanics problems
Search Results
1. A differential manometer is used to measure
Options
A. atmospheric pressure
B. pressure in pipes and channels
C. pressure in venturimeter
D. difference of pressures between two points in a pipe
Show Answer
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Discuss
Correct Answer: difference of pressures between two points in a pipe
2. The volume of a fluid __________ as the pressure increases.
Options
A. remains same
B. decreases
C. increases
Show Answer
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Discuss
Correct Answer: decreases
3. The hydraulic gradient line is always parallel to the centre line of the pipe.
Options
A. Correct
B. Incorrect
Show Answer
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Correct Answer: Incorrect
4. The celerity (velocity) of a pressure wave in a fluid is given by (where
K
= Bulk modulus, and ? = Density of the fluid)
Options
A.
K
.?
B.
K
/?
C.
?/
K
D.
K
.?
Show Answer
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Discuss
Correct Answer:
K
/?
5. The total energy of a liquid particle in motion is equal to
Options
A. pressure energy + kinetic energy + potential energy
B. pressure energy - (kinetic energy + potential energy)
C. potential energy - (pressure energy + kinetic energy
D. kinetic energy - (pressure energy + potential energy)
Show Answer
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Correct Answer: pressure energy + kinetic energy + potential energy
6. The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
7. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
Options
A. sum
B. difference
C. arithmatic mean
D. geometric mean
Show Answer
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Correct Answer: difference
8. Coefficient of velocity is defined as the ratio of
Options
A. actual velocity of jet at vena contracta to the theoretical velocity
B. area of jet at vena contracta to the area of orifice
C. actual discharge through an orifice to the theoretical discharge
D. none of the above
Show Answer
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Correct Answer: actual velocity of jet at vena contracta to the theoretical velocity
9. A flow is called sonic, if the Mach number is unity.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
10. The property of a liquid which controls its rate of flow is called viscosity.
Options
A. True
B. False
Show Answer
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Correct Answer: True
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