Q. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.

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Q. Lap joints are preferred for plates having thickness __________ mm.

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Q. Maximum allowable vapour velocity in a bubble cap tower is determined by the

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Q. Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is

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Q. The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

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Q. Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?

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Q. Reflux ratio variation in a distillation column is between

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Q. In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

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Q. Which of the following lengths of heat exchanger tubes are normally not used in practice ?

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Q. A pipe is generally made of circular cross-section, because a circular cross-section has the

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Q. In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hᵢ) vanishes after a Reynold number of

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Q. In inclined long tube vertical evaporators, the tubes are inclined at an angle of

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Q. In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

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Q. The wall thickness for a large high pressure pipeline is determined by the consideration of the

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Q. In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference

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Q. Skirt support is the most suitable for supporting __________ vessels.

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Q. The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

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Q. Joint efficiency (J) for a seamless pipe is

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Q. For a given design of bubble cap, the number of bubble caps to be used per tray is set by the

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Q. The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.

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