| 1. | The angle of contact in case of a liquid depends upon: A. The nature of the liquid and the solid B. The material which exists above the free surface of the liquid ? | |
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Only A
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Only B
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Both A and B
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Neither A nor B
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Report Question| 2. | To avoid vapourization in the pipe line, the pipe line over the ridge is laid such that it is not more than ? | |
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2.4 m above the hydraulic gradient
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6.4 m above the hydraulic gradient
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10.0 m above the hydraulic gradient
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5.0 above the hydraulic gradient
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| 3. | Capillary action is due to the ? | |
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surface tension
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cohesion of the liquid
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adhesion of the liquid molecules and the molecules on the surface of a solid
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All options are correct
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| 4. | Which of the following instrument can be used for measuring speed of a submarine moving in deep sea ? | |
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Venturimeter
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Orifice plate
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hot wire anemometer
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None of these
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| 5. | The continuity equation in fluid flow ? | |
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states that energy is constant along a streamline
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states that energy is constant everywhere in the fluid
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applies to irrotational flow only
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states that the net rate of inflow into small volume must be zero
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| 6. | In series-pipe applications ? | |
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the head losses through each pipe are added to obtain the total head loss
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the head loss is same through each pipe
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friction factors are assumed for each pipe
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flow increases
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| 7. | Hydraulic diameter used in place of diameter of non-circular ducts is equal to ? | |
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A/m
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(4 A)/m
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A/(4 m)
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m/A
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| 8. | Hydraulic ram is a device used ? | |
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to accelerate water flow
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lift water without electric motor
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for lifting heavy load
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beat water and lift it
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| 9. | In a free vortex motion, the tangential velocity of the water particles is proportional to ? | |
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distance from the centre r
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r²
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1/r
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1/r²
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| 10. | The frictional resistance of a pipe varies approximately as ? | |
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velocity of flow v
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v²
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root v
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v
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