| 1. | Discharge of a centrifugal pump ? | |
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directly proportional to diameter of its impeller
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inversely proportional to diameter of its impeller
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directly proportional to (diameter)2 of its impeller
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inversely proportional to (diameter)2 of its impeller
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Report Question| 2. | Geometric similarity is said to exist between the model and the prototype, if both of them ? | |
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have identical velocities
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are equal in size and shape
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are identical in shape, but differ only in size
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have identical forces
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| 3. | The number of buckets on the periphery of a Pelton wheel is given by ? | |
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(D / 2d) + 5
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(D / 2d) + 10
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(D / 2d) + 15
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(D / 2d) + 20
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| 4. | The working of which of the following hydraulic units is based on Pascal's law ? | |
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Air lift pump
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Jet pump
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Hydraulic coupling
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Hydraulic press
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| 5. | Overall efficiency of a centrifugal pump is the ratio of ? | |
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energy available at the impeller to the energy supplied to the pump by the prime mover
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actual workdone by the pump to the energy supplied to the pump by the prime mover
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energy supplied to the pump to the energy available at the impeller
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manometric head to the energy supplied by the impeller per kN of water
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| 6. | A hydraulic press is a device used ? | |
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to store pressure energy which may be supplied to a machine later on
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to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
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to lift larger load by the application of a comparatively much smaller force
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all of the above
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| 7. | A hydraulic ram is a device used to ? | |
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store the energy of water
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increase the pressure of water
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to lift water from deep wells
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to lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
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| 8. | The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. 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 mixed flow at outlet
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| 9. | Delivery head 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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| 10. | The cavitation in a hydraulic machine is mainly due to ? | |
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low velocity
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high velocity
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low pressure
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high pressure
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