Q. Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always

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Q. Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head.

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Q. Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8").

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Q. Pick out the wrong statement.

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

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Q. Wind load consideration in the design of a support can be neglected, when the vessel is

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Q. The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

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Q. A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

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Q. Scale up problem in design based on the similarity concept takes into account __________ similarity.

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Q. __________ closure is the weakest enclosure for cylindrical vessels.

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Q. Which of the following efficiencies can be greater than 100% ?

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Q. Optimum economic pipe diameter for fluid flow is determined by the

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Q. Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.

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Q. Vertical storage vessels are never supported by __________ support.

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Q. In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be

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Q. Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)

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Q. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by __________ times the hole diameter.

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Q. What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ?

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Q. Filtration rate is affected by the

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Q. Liquid gradient over a tray can be minimised by

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