Hydraulic and Fluid Mechanics

41. A notch is used to measure

1. Pressure
2. Discharge
3. Velocity
4. Volume

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42. A nozzle is generally made of

1. Cylindrical shape
2. Convergent shape
3. Divergent shape
4. Convergent-divergent shape

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43. A nozzle placed at the end of a water pipe line discharges water at a

1. Low pressure
2. High pressure
3. Low velocity
4. High velocity

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44. A one dimensional flow is one which

1. Is uniform flow
2. Is steady uniform flow
3. Takes place in straight lines
4. Involves zero transverse component of flow

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45. A perfect gas

1. Has constant viscosity
2. Has zero viscosity
3. Is in compressible
4. None of the above

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46. A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

1. The metal piece will simply float over the mercury
2. The metal piece will be immersed in mercury by half
3. Whole of the metal piece will be immersed with its top surface just at mercury level
4. Metal piece will sink to the bottom

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47. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury?

1. 0.5
2. 0.4
3. 0.515
4. 0.5

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48. A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

1. 0.83
2. 0.6
3. 0.4
4. 0.3

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49. A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

1. 1
2. 5
3. 7
4. 6

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50. A Piezometer tube is used only for measuring

1. Low pressure
2. High pressure
3. Moderate pressure
4. Vacuum pressure

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