| 1. | Discharge of a centrifugal pump is ? | |
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directly proportional to N
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inversely proportional to N
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directly proportional to N²
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inversely proportional to N²
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Report Question| 2. | The speed ratio in case of Francis turbine varies from ? | |
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0.15 to 0.3
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0.4 to 0.5
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0.6 to 0.9
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1 to 1.5
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| 3. | The cavitation in a hydraulic machine ? | |
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causes noise and vibration of various parts
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reduces the discharge of a turbine
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causes sudden drop in power output and efficiency
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all of the above
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| 4. | A Pelton wheel is ? | |
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tangential flow impulse turbine
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inward flow impulse turbine
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outward flow impulse turbine
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inward flow reaction turbine
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| 5. | The overall efficiency for a Pelton wheel lies between ? | |
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0.50 to 0.65
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0.65 to 0.75
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0.75 to 0.85
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0.85 to 0.90
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| 6. | In an inward flow reaction turbine ? | |
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the water flows parallel to the axis of the wheel
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the water enters at the centre of the wheel and then flows towards the outer periphery of the wheel
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the water enters the wheel at the outer periphery and then flows towards the centre of the wheel
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the flow of water is partly radial and partly axial
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| 7. | If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have ? | |
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geometric similarity
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kinematic similarity
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dynamic similarity
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none of these
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| 8. | A turbine develops 10 000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is ? | |
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175.41p.m
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215.5 r.p.m
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241.5 r.p.m
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275.4 r.p.m
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| 9. | For 450 m head of water.............. shall be used ? | |
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Pelton wheel
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Kaplan turbine
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Francis turbine
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none of these
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| 10. | The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is ? | |
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slow speed with radial flow at outlet
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medium speed with radial flow at outlet
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high speed with radial flow at outlet
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high speed with axial flow at outlet
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