Discussion
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- Question
Multi-stage centrifugal pumps are used to
Options- A. give high discharge
- B. produce high heads
- C. pump viscous fluids
- D. all of these
- Correct Answer
- produce high heads
- 1. In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.
Options- A. True
- B. False Discuss
- 2. The capacity of a hydraulic accumulator is generally specified as the maximum amount of energy stored.
Options- A. True
- B. False Discuss
- 3. In a reaction turbine, the draft tube is used
Options- A. to run the turbine full
- B. to prevent air to enter the turbine
- C. to increase the head of water by an amount equal to the height of the runner outlet above the tail race
- D. to transport water to downstream Discuss
- 4. The efficiency of a centrifugal pump will be maximum when the blades are bent backward.
Options- A. Yes
- B. No Discuss
- 5. If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by
Options- A. H = Hg/hf
- B. H = Hg x hf
- C. H = Hg + hf
- D. H = Hg - hf Discuss
- 6. The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.
Options- A. True
- B. False Discuss
- 7. The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.
Options- A. hydraulic
- B. mechanical
- C. overall Discuss
- 8. A hydraulic coupling belongs to the category of
Options- A. power absorbing machines
- B. power developing machines
- C. energy transfer machines
- D. energy generating machines Discuss
- 9. The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle ? with the jet is
Options- A.
- B.
- C.
- D.
Discuss
- 10. In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.
Options- A. Agree
- B. Disagree Discuss
Hydraulic Machines problems
Search Results
Correct Answer: True
Correct Answer: True
Correct Answer: to increase the head of water by an amount equal to the height of the runner outlet above the tail race
Correct Answer: Yes
Correct Answer: H = Hg - hf
Correct Answer: True
Correct Answer: mechanical
Correct Answer: energy transfer machines
Correct Answer:
Correct Answer: Disagree
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