Q. Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

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Q. In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

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Q. For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter ).

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Q. Longitundinal stress induced in a thin walled cylindrical storage vessel is

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Q. The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.

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Q. The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

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Q. Pick out the wrong statement pertaining to a shell and tube heat exchanger.

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Q. Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

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Q. Back-trapping in a distillation column results due to

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Q. For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used ?

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Q. Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

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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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