Discussion
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- Question
The impeller of a centrifugal pump may have
Options- A. volute casing
- B. volute casing with guide blades
- C. vortex casing
- D. any one of these
- Correct Answer
- any one of these
- 1. In a centrifugal pump, the water enters the impeller __________ and leaves the vanes axially.
Options- A. axially
- B. radially Discuss
- 2. An impulse turbine is used for
Options- A. low head of water
- B. high head of water
- C. medium head of water
- D. high discharge Discuss
- 3. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is
Options- A. 39.2%
- B. 48.8%
- C. 84.8%
- D. 88.4% Discuss
- 4. Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ?o = Overall efficiency of the pump)
Options- A.
- B.
- C.
- D.
Discuss
- 5. The specific speed of a hydraulic turbine depends upon
Options- A. speed and power developed
- B. discharge and power developed
- C. speed and head of water
- D. speed, power developed and head of water Discuss
- 6. Kinematic 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. have identical forces Discuss
- 7. In order to avoid cavitation in centrifugal pumps
Options- A. the suction pressure should be high
- B. the delivery pressure should be high
- C. the suction pressure should be low
- D. the delivery pressure should be low Discuss
- 8. A reciprocating pump is suitable for less discharge and higher heads.
Options- A. True
- B. False Discuss
- 9. The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.
Options- A. Yes
- B. No Discuss
- 10. In an inward flow reaction turbine
Options- A. the water flows parallel to the axis of the wheel
- B. the water enters at the centre of the wheel and then flows towards the outer periphery of the wheel
- C. the water enters the wheel at the outer periphery and then flows towards the centre of the wheel
- D. the flow of water is partly radial and partly axial Discuss
Hydraulic Machines problems
Search Results
Correct Answer: radially
Correct Answer: high head of water
Correct Answer: 39.2%
Correct Answer:
Correct Answer: speed, power developed and head of water
Correct Answer: have identical velocities
Correct Answer: the suction pressure should be high
Correct Answer: True
Correct Answer: Yes
Correct Answer: the water enters the wheel at the outer periphery and then flows towards the centre of the wheel
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