The square plate is attached to a short link at A and a roll

The square plate is attached to a short link at A, and a roller at C. At the instant shown, the control link OA has a counterclockwise angular velocity of 4 rad/s. If the speed of point C is slowing down at the rate of 50 nun/s^2, determine the acceleration of point A and B at this instant.

Solution

The data below is provided for a centrifugal pump with a 72 inch impellor operating at 225 rpm (where e is pump efficiency). What size and speed of a homologous pump should be used to produce 200 cfs at 60ft head when operating at highest efficiency? The answer must be: 51 in and 369 rpm

H (ft) Q (cfs) e (%)

60 200 69

57.5 225 75

55 256 80

52.5 280 83.7

50 303 86

47.5 330 87.3

45 345 88

42.5 362 87.4

40 382 86.3

37.5 396 84.4

35 411 82

32.5 425 79

30 438 75

27.5 449 71

25 459 66.5