71. Foot valves are provided in the suction line of a centrifugal pump to
72. Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.
73. Lower BWG means __________ of the tube.
74. In magnetic flow meters, voltage generation is
75. Net positive suction head (NPSH) of a centrifugal pump must be
76. In a fully turbulent flow (Re > 105) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is
77. A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be
78. A fluidis $$\left( {\frac{\mu }{\rho } = 0.01{\text{ c}}{{\text{m}}^2}/\sec } \right)$$ moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
79. Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
80. The co-efficient of discharge of an orificemeter is a function of
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