Discussion
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- Question
The number of buckets on the periphery of a Pelton wheel is given by
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. The function of guide vanes in a reaction turbine is to
Options- A. allow the water to enter the runner without shock
- B. allow the water to flow over them, without forming eddies
- C. allow the required quantity of water to enter the turbine
- D. all of the above Discuss
- 2. The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base.
Options- A. Agree
- B. Disagree Discuss
- 3. Head developed by a centrifugal pump is
Options- A. proportional to diameter of impeller
- B. proportional to speed of impeller
- C. proportional to diameter and speed of impeller
- D. none of the above Discuss
- 4. If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have
Options- A. geometric similarity
- B. kinematic similarity
- C. dynamic similarity
- D. none of these Discuss
- 5. The unit speed of the turbine runner is
Options- A.
- B.
- C.
- D.
Discuss
- 6. The undershot water wheels are those in which
Options- A. the wheel runs entirely by the weight of water
- B. the wheel runs entirely by the impulse of water
- C. the wheel runs partly by the weight of water and partly by the impulse of water
- D. none of the above Discuss
- 7. A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?
Options- A. Pelton wheel with one nozzle
- B. Pelton wheel with two or more nozzles
- C. Kaplan turbine
- D. Francis turbine Discuss
- 8. If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.
Options- A. Correct
- B. Incorrect Discuss
- 9. The jet ratio is defined as the ratio of the
Options- A. diameter of jet to the diameter of Pelton wheel
- B. velocity of jet to the velocity of Pelton wheel
- C. diameter of Pelton wheel to the diameter of jet
- D. velocity of Pelton wheel to the velocity of jet Discuss
- 10. In an impulse turbine, the pressure of water both at entering and leaving the vanes, is atmospheric.
Options- A. Agree
- B. Disagree Discuss
Hydraulic Machines problems
Search Results
Correct Answer: all of the above
Correct Answer: Agree
Correct Answer: proportional to diameter and speed of impeller
Correct Answer: geometric similarity
Correct Answer:
Correct Answer: the wheel runs entirely by the impulse of water
Correct Answer: Pelton wheel with one nozzle
Correct Answer: Incorrect
Correct Answer: diameter of Pelton wheel to the diameter of jet
Correct Answer: Agree
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