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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.
Options
A. less than twice
B. more than twice
C. less than three times
D. more than three times
Correct Answer
less than three times
Hydraulics and Fluid Mechanics problems
Search Results
1. 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.
Show Answer
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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
2. 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%
Show Answer
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Correct Answer: 2.5%
3. 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
4. A flow is called sonic, if the Mach number is unity.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
5. 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
6. In case of flow through parallel pipes,
Options
A. the head loss for all the pipes is same
B. the total discharge is equal to the sum of discharges in the various pipes
C. the total head loss is the sum of head losses in the various pipes
D. Both (A) and (B)
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Correct Answer: Both (A) and (B)
7. A point, in a compressible flow where the velocity of fluid is zero, is called
Options
A. critical point
B. vena contracta
C. stagnation point
D. none of these
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Correct Answer: stagnation point
8. The torque required to overcome viscous resistance of a collar bearing is (where
R
1
and
R
2
= External and internal radius of collar)
Options
A.
B.
C.
D.
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Correct Answer:
9. Barometer is used to measure
Options
A. velocity of liquid
B. atmospheric pressure
C. pressure in pipes and channels
D. difference of pressure between two points in a pipe
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Correct Answer: atmospheric pressure
10. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
Options
A. one-half
B. one-third
C. two-third
Show Answer
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Correct Answer: one-third
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