Discussion
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- Question
Which of the following pump is successfully used for lifting water to the turbines?
Options- A. Centrifugal pump
- B. Reciprocating pump
- C. Jet pump
- D. Air lift pump
- Correct Answer
- Jet pump
- 1. The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is
Options- A.
- B.
- C.
- D.
Discuss
- 2. Manometric head is the actual head of water against which a centrifugal pump has to work.
Options- A. Correct
- B. Incorrect Discuss
- 3. Slip of a reciprocating pump is negative, when
Options- A. suction pipe is short and pump is running at low speeds
- B. delivery pipe is long and pump is running at high speeds
- C. suction pipe is short and delivery pipe is long and the pump is running at low speeds
- D. suction pipe is long and delivery pipe is short and the pump is running at high speeds Discuss
- 4. A hydraulic press is a device used
Options- A. to store pressure energy which may be supplied to a machine later on
- B. to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
- C. to lift larger load by the application of a comparatively much smaller force
- D. all of the above Discuss
- 5. In a reaction turbine, the water enters the wheel under pressure and flows over the vanes.
Options- A. Correct
- B. Incorrect Discuss
- 6. The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is
Options- A. slow speed with radial flow at outlet
- B. medium speed with radial flow at outlet
- C. high speed with radial flow at outlet
- D. high speed with mixed flow at outlet Discuss
- 7. The speed ratio in case of Francis turbine varies from
Options- A. 0.15 to 0.3
- B. 0.4 to 0.5
- C. 0.6 to 0.9
- D. 1 to 1.5 Discuss
- 8. The power of a centrifugal pump working under constant head and discharge increases with the speed.
Options- A. True
- B. False Discuss
- 9. Which of the following is not a reaction turbine?
Options- A. Furneyron turbine
- B. Jonval turbine
- C. Thomson's turbine
- D. Pelton wheel Discuss
- 10. The cavitation in a hydraulic machine
Options- A. causes noise and vibration of various parts
- B. reduces the discharge of a turbine
- C. causes sudden drop in power output and efficiency
- D. all of the above Discuss
Hydraulic Machines problems
Search Results
Correct Answer:
Correct Answer: Correct
Correct Answer: suction pipe is long and delivery pipe is short and the pump is running at high speeds
Correct Answer: to lift larger load by the application of a comparatively much smaller force
Correct Answer: Correct
Correct Answer: high speed with mixed flow at outlet
Correct Answer: 0.6 to 0.9
Correct Answer: True
Correct Answer: Pelton wheel
Correct Answer: all of the above
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