Discussion
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- Question
A reciprocating pump is also called a __________ displacement pump.
Options- A. positive
- B. negative
- Correct Answer
- positive
- 1. A hydraulic accumulator is a device used to store __________ energy which may be supplied to a machine later on.
Options- A. strain
- B. pressure
- C. kinetic Discuss
- 2. Braking jet in an impulse turbine is used
Options- A. to break the jet of water
- B. to bring the runner to rest in a short time
- C. to change the direction of runner
- D. none of these Discuss
- 3. Which of the following statement is correct?
Options- A. In an impulse turbine, the water impinges on the buckets with pressure energy.
- B. In a reaction turbine, the water glides over the moving vanes with kinetic energy.
- C. In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.
- D. In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes. Discuss
- 4. The gross or total head of the turbine is the __________ of the water levels at the head race and tail race.
Options- A. sum
- B. difference
- C. product Discuss
- 5. The overall efficiency for a Pelton wheel lies between
Options- A. 0.50 to 0.65
- B. 0.65 to 0.75
- C. 0.75 to 0.85
- D. 0.85 to 0.90 Discuss
- 6. The unit speed of the turbine runner is
Options- A.
- B.
- C.
- D.
Discuss
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Hydraulic Machines problems
Search Results
Correct Answer: pressure
Correct Answer: to bring the runner to rest in a short time
Correct Answer: In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.
Correct Answer: difference
Correct Answer: 0.85 to 0.90
Correct Answer:
Correct Answer: geometric similarity
Correct Answer: proportional to diameter and speed of impeller
Correct Answer: Agree
Correct Answer: all of the above
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