Discussion
Home ‣ Mechanical Engineering ‣ Hydraulics and Fluid Mechanics Comments
- Question
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.
Options- A. neutral
- B. stable
- C. unstable
- Correct Answer
- neutral
- 1. The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.
Options- A. Yes
- B. No Discuss
- 2. The ratio of the inertia force to the surface tension force is called Weber's number.
Options- A. Correct
- B. Incorrect Discuss
- 3. The density of air is same at different heights.
Options- A. Correct.
- B. Incorrect Discuss
- 4. The specific weight of water in S.I. units is taken as
Options- A. 9.81 kN/m3
- B. 9.81 x 103 kN/m3
- C. 9.81 x 10-6 N/mm3
- D. any one of these Discuss
- 5. The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
Options- A. Yes
- B. No Discuss
- 6. A flow is called sub-sonic, if the Mach number is
Options- A. less than unity
- B. unity
- C. between 1 and 6
- D. more than 6 Discuss
- 7. The loss of head at exit of a pipe is
Options- A.
- B.
- C.
- D.
Discuss
- 8. Which of the following statement is correct?
Options- A. In a compressible flow, the volume of the flowing liquid changes during the flow.
- B. A flow in which the volume of the flowing liquid does not change, is called incompressible flow.
- C. When the particles rotate about their own axes while flowing, the flow is said to be rotational flow.
- D. all of the above Discuss
- 9. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
Options- A. half the depth
- B. half the breadth
- C. twice the depth
- D. twice the breadth Discuss
- 10. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.
Options- A. Yes
- B. No Discuss
Hydraulics and Fluid Mechanics problems
Search Results
Correct Answer: Yes
Correct Answer: Correct
Correct Answer: Incorrect
Correct Answer: 9.81 kN/m3
Correct Answer: Yes
Correct Answer: less than unity
Correct Answer:
Correct Answer: all of the above
Correct Answer: half the depth
Correct Answer: Yes
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