31. The contraction co-efficient for Borda's mouthpiece (for frictionless fluid) is
32. In case of venturimeters, friction losses are about __________ percent of maximum velocity head.
33. Erosion and pits formation on the impeller of a centrifugal pump may be due to
34. Check in a centrifugal pump is
35. Check valves are used
36. Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its
37. Experimental study of laminar fluid flow through a circular tube was conducted by
38. Centrifugal pump is normally classified on the basis of the
39. The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is
40. Cocks are used to control
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