Hydraulics problems
- 1. A jet projected at an angle of 45?, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is
Options- A. 15 m
- B. 20 m
- C. 30 m
- D. 40 m
- E. 60 m. Discuss
Correct Answer: 40 m
- 2. To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than
Options- A. 2.4 m
- B. 6.4 m
- C. 10.0 m
- D. 5.0 m. Discuss
Correct Answer: 6.4 m
- 3. Atmospheric pressure varies with
Options- A. altitude
- B. temperature
- C. weather conditions
- D. all of the above. Discuss
Correct Answer: all of the above.
- 4. Molecules of fluids get attracted due to
Options- A. capillarity action
- B. surface tension
- C. adhesion
- D. cohesion
- E. none of these. Discuss
Correct Answer: adhesion
- 5. Atmospheric pressure is equal to water column head of
Options- A. 9.81 m
- B. 5.0 m
- C. 10.30 m
- D. 7.5 m. Discuss
Correct Answer: 10.30 m
- 6. 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
Correct Answer: all the above.
- 7. 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
Correct Answer: size and shape of the cross-section in a particular length remain constant
- 8. 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
Correct Answer: 60 cm
- 9. Shear stress is directly proportional to
Options- A. the velocity
- B. the shear strain
- C. the viscosity
- D. the velocity. Discuss
Correct Answer: the shear strain
- 10. 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
Correct Answer: turbulent flow
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