51. 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
52. In a shell and tube heat exchanger, tube side __________ of the mass velocity.
53. Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?
54. Saddle supports are used for supporting __________ vessels.
55. The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.
56. In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.
57. Optimum reflux ratio in a continuous distillation column is determined by the
58. Cooling water fouling factors vary in the range of 0.001 to 0.003
59. Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter )
60. The maximum liquid gradient over a tray must not exceed
61. An underdesigned steam trap will
62. The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)
63. Speed of industrial paddle agitator ranges from __________ rpm.
64. __________ strain is measured using a 'strain rosetter'.
66. With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.
67. The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is
68. Vertical vessels are not supported by
69. With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will
70. Spherical shaped pressure vessel is considered to be the most ideal, because it can
71. An adequate clearance between the tray and the shell wall of a distillation column is provided to
72. Overall tray efficiency of a distillation column is the ratio of the number of
73. Pick out the wrong statement about the design of a sieve plate column.
74. Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.
75. 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.