Discussion
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- Question
For the most economical trapezoidal section of a channel with regards to discharge, the required condition, is
Options- A. half of top width = sloping side
- B. hydraulic depth = half the depth
- C.
- D. perpendiculars drawn from the centre of the top width on to the bottom sloping side, are all equal
- E. all the above.
- Correct Answer
- all the above.
- 1. If velocities of fluid particles vary from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be
Options- A. laminar
- B. turbulent flow
- C. uniform flow
- D. non-uniform flow. Discuss
- 2. Shear stress is directly proportional to
Options- A. the velocity
- B. the shear strain
- C. the viscosity
- D. the velocity. Discuss
- 3. For exerting a pressure of 4.8 kg/cm2, the depth of oil (specific gravity 0.8), should be
Options- A. 40 cm
- B. 41 cm
- C. 56 cm
- D. 60 cm
- E. 76 cm. Discuss
- 4. Uniform flow is said to occur when
Options- A. size and shape of the cross-section in a particular length remain constant
- B. size and shape of the cross-section change along a length
- C. frictional loss in the particular length of the channel will the more than the drop in its elevation
- D. frictional loss in the particular length of the channel, will be less than the drop in elevation. Discuss
- 5. Which one of the following statements is true?
Options- A. The value of kinetic energy correction factor for turbulent flow lies between 1.03 to 1.06
- B. The value of kinetic energy correction factor for laminar flow is 2
- C. The practical value of kinetic energy correction factor for turbulent flow is unity
- D. all the above. Discuss
- 6. Pick up the correct statement from the following :
Options- A. Total energy gradient is the graphical representation of the total head at any section of a pipe line
- B. Vertical distance between the total energy line and hydraulic grade line is equal to the velocity head
- C. Vertical distance between the total energy line and total energy gradient represents loss of head
- D. all the above. Discuss
- 7. Manning's formula is used for
Options- A. flow in open channels
- B. head loss due to friction in open channels
- C. head loss due to friction in pipes flowing full
- D. flow in pipes. Discuss
- 8. On an inclined plane, centre of pressure is located
Options- A. at the centroid
- B. above the centroid
- C. below the centroid
- D. anywhere. Discuss
- 9. For the flow of liquid from an open ended tube (or nozzle) leading to the formation of spray of liquid drops, the number generally applied, is
Options- A. Froude number
- B. Weber number
- C. Reynold number
- D. Mach number. Discuss
- 10. If Cv, Cc, Cd and Cr are the hydraulic coefficients of an orifice, then
Options- A. Cd = Cc . Cv
- B. Cr = 1 + Cv2/Cd
- C. Cv = Cc + Cd
- D. Cc = Cv/Cd Discuss
Hydraulics problems
Search Results
Correct Answer: turbulent flow
Correct Answer: the shear strain
Correct Answer: 60 cm
Correct Answer: size and shape of the cross-section in a particular length remain constant
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: head loss due to friction in open channels
Correct Answer: below the centroid
Correct Answer: Weber number
Correct Answer: Cd = Cc . Cv
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