Hydraulics and Fluid Mechanics problems
- 1. The surface tension of mercury at normal temperature is __________ that of water.
Options- A. same as
- B. lower than
- C. higher than Discuss
Correct Answer: higher than
- 2. 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 Discuss
Correct Answer: Agree
- 3. 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 Discuss
Correct Answer: difference
- 4. 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 Discuss
Correct Answer: actual velocity of jet at vena contracta to the theoretical velocity
- 5. A flow is called sonic, if the Mach number is unity.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 6. The property of a liquid which controls its rate of flow is called viscosity.
Options- A. True
- B. False Discuss
Correct Answer: True
- 7. 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% Discuss
Correct Answer: 2.5%
- 8. 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. Discuss
Correct Answer: The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
- 9. 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 Discuss
Correct Answer: less than three times
- 10. 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) Discuss
Correct Answer: Both (A) and (B)
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