61. The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the
62. 1.2 to 3.8 cms is the value of the
63. Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
64. Larger depth of liquid on the trays of a distillation column
65. In a shell and tube heat exchanger, the 'tube pitch' is defined as the
66. For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter).
67. Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from
68. Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.
69. Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to
70. The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from
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