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- Question
Overall efficiency of a centrifugal pump is the ratio of
Options- A. energy available at the impeller to the energy supplied to the pump by the prime mover
- B. actual workdone by the pump to the energy supplied to the pump by the prime mover
- C. energy supplied to the pump to the energy available at the impeller
- D. manometric head to the energy supplied by the impeller per kN of water
- Correct Answer
- actual workdone by the pump to the energy supplied to the pump by the prime mover
- 1. In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.
Options- A. Correct
- B. Incorrect Discuss
- 2. The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))
Options- A.
- B.
- C.
- D.
Discuss
- 3. In a reciprocating pump, air vessels are used to
Options- A. smoothen the flow
- B. reduce suction head
- C. increase delivery head
- D. reduce acceleration head Discuss
- 4. Which type of the pump is different from others in the same group?
Options- A. Screw pump
- B. Gear pump
- C. Cam and piston pump
- D. Plunger pump Discuss
- 5. In a Francis turbine, the pressure at inlet is __________ that at outlet.
Options- A. less than
- B. more than Discuss
- 6. A hydraulic ram is a device used to
Options- A. store the energy of water
- B. increase the pressure of water
- C. to lift water from deep wells
- D. to lift small quantity of water to a greater height when a large quantity of water is available at a smaller height Discuss
- 7. A Kaplan turbine is an axial flow reaction turbine.
Options- A. Correct
- B. Incorrect Discuss
- 8. In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.
Options- A. Correct
- B. Incorrect Discuss
- 9. The cavitation in reaction turbines is avoided, to a great extent by
Options- A. installing the turbine below the tail race level
- B. using stainless steel runner of the turbine
- C. providing highly polished blades to the runner
- D. all of the above Discuss
- 10. Dynamic similarity is said to exist between the model and the prototype, if both of them
Options- A. have identical velocities
- B. are equal in size and shape
- C. are identical in shape, but differ only in size
- D. none of the above Discuss
Hydraulic Machines problems
Search Results
Correct Answer: Correct
Correct Answer:
Correct Answer: reduce acceleration head
Correct Answer: Plunger pump
Correct Answer: more than
Correct Answer: to lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
Correct Answer: Correct
Correct Answer: Correct
Correct Answer: all of the above
Correct Answer: none of the above
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