61. In a cylinderical vessel subjected to internal pressure, the longitudinal stress $${\sigma _{\text{L}}}$$ and the circumferential stress, $${\sigma _{\text{h}}}$$ are related by
62. A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.
63. A binary liquid azeotropic mixture has boiling point lower than either of the components, when it shows __________ deviation from Raoult's Law.
64. Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.
65. The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.
66. Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.
67. The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.
68. Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.
69. Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.
70. The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.
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