61. A flow through a long pipe at constant rate is called
62. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
63. Head developed by a centrifugal pump is
64. Delivery head of a centrifugal pump is
65. Discharge of a centrifugal pump is
66. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
67. The flow in a pipe or channel is said to be uniform when
68. Euler's number is the ratio of __________ force to pressure force.
69. The property of fluid by virtue of which it offers resistance to shear is called
70. A hydraulic coupling belongs to the category of
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