41. __________ shaped roof is most commonly used for cylindrical tanks.
42. The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.
43. Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.
44. Accidents in chemical plants are mostly due to
45. Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.
46. In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.
47. Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation
48. The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.
49. Pick out the wrong statement.
50. Pick out the wrong statement pertaining to the design of a basket type evaporator.
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