71. Flow in pipes is turbulent if Reynold number is
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72. Equation of continuity of flow is based on the principle of conservation of
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73. The velocity of the fluid particle at the centre of the pipe section, is
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74. For solving the problems is hydraulic engineering, the velocity used is
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75. The flow is called rotational if its velocity normal to the plane of area is equal to
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76. For an irrotational flow, the equation y*v= 0 is given by
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77. 'Flow net' can be drawn only if the flow is
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