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Mechanical Engineering
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Hydraulics and Fluid Mechanics
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Question
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
Correct Answer
difference
Hydraulics and Fluid Mechanics problems
Search Results
1. 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
Show Answer
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Correct Answer: Agree
2. The surface tension of mercury at normal temperature is __________ that of water.
Options
A. same as
B. lower than
C. higher than
Show Answer
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Correct Answer: higher than
3. 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
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Correct Answer: difference of pressures between two points in a pipe
4. The volume of a fluid __________ as the pressure increases.
Options
A. remains same
B. decreases
C. increases
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Correct Answer: decreases
5. The hydraulic gradient line is always parallel to the centre line of the pipe.
Options
A. Correct
B. Incorrect
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Correct Answer: Incorrect
6. 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
7. A flow is called sonic, if the Mach number is unity.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
8. The property of a liquid which controls its rate of flow is called viscosity.
Options
A. True
B. False
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Correct Answer: True
9. An error of 1% in measuring head over the crest of the notch (
H
) will produce an error of __________ in discharge over a triangular notch,
Options
A. 1%
B. 1.5%
C. 2%
D. 2.5%
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Correct Answer: 2.5%
10. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?
Options
A. The pressure on the wall at the liquid level is minimum.
B. The pressure on the bottom of the wall is maximum.
C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
D. The pressure on the bottom of the wall is zero.
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Correct Answer: The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
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