Discussion
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- Question
The flow in open channel is said to be subcritical if the Froude number is
Options- A. less than 1.0
- B. equal to 1.0
- C. greater than 1.0
- D. none.
- Correct Answer
- less than 1.0
- 1. Pick up the incorrect statement from to following regarding triangular notch :
Options- A. For measuring low discharge, it gives more accurate result
- B. Only one reading (i.e. H) is required for computation of discharge
- C. Ventilation is necessary
- D. None of these. Discuss
- 2. For the two dimensional flow, the stream function is given by ? = 2xy. The velocity at a point (3, 4) is
Options- A. 6 m/sec
- B. 8 m/sec
- C. 10 m/sec
- D. 12 m/sec
- E. 15 m/sec. Discuss
- 3. The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is
Options- A. 1/2
- B. 2/3
- C. 3/2
- D. 3/4 Discuss
- 4. If E1 and E2 are the specific energies at the start of back water curve and at the maximum rise of water respectively and ib and ie are the head slope and the energy line slope respectively, the length of back water (L) is given by
Options- A.
- B.
- C.
- D. None of these. Discuss
- 5. Most economical section of a circular channel for maximum velocity, is if,
Options- A. depth of water = 0.810 diameter
- B. hydraulic mean depth = 0.304 diameter
- C. wetted perimeter = 2.245 diameters
- D. all the above. Discuss
- 6. The width of a weir with end contraction, is
Options- A. equal to the width of the channel
- B. less than the width of the channel
- C. half the width of the channel
- D. none of these. Discuss
- 7. If the pressure at the inlet of a pipe is 90 kg/cm2 and pressure drop over the pipe line is 10 kg/cm2, the efficiency of transmission, is
Options- A. 66.6%
- B. 77.7%
- C. 55.5%
- D. 88.8%. Discuss
- 8. Centre of buoyancy is
Options- A. centroid of the floating body
- B. centroid of the fluid displaced
- C. centre of pressure of the displaced liquid
- D. none of these. Discuss
- 9. Total energy line is
Options- A. pressure head
- B. datum head
- C. kinetic head
- D. All the above. Discuss
- 10. A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is
Options- A. 0.8
- B. 0.9
- C. 1.0
- D. 1.1 Discuss
Hydraulics problems
Search Results
Correct Answer: Ventilation is necessary
Correct Answer: 10 m/sec
Correct Answer: 3/2
Correct Answer:
Correct Answer: all the above.
Correct Answer: less than the width of the channel
Correct Answer: 88.8%.
Correct Answer: centroid of the fluid displaced
Correct Answer: All the above.
Correct Answer: 1.1
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