Q. 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

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Q. In a shell and tube heat exchanger, tube side __________ of the mass velocity.

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Q. Cooling water fouling factors vary in the range of 0.001 to 0.003

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Q. Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter )

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Q. The maximum liquid gradient over a tray must not exceed

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Q. An underdesigned steam trap will

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Q. The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

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Q. Needle valves are generally not used for

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Q. Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the

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Q. Pick out the wrong statement.

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Q. With increase in gas flow rate to fabric surface area ratio (Nm³/hr/m² fabric surface area), the size & the cost of a bag filter

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Q. A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the

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Q. Accidents in chemical plants are mostly due to

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Q. For identical operating conditions, the pressure drop over __________ tray is the highest out of the following.

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Q. A perforated plate has holes of diameter dₙ arranged in a pitch pₕ. Each hole has a tube of I.D. dₜ passing through it. The ligament efficiency is given by

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Q. __________ is the determining factor for the number of bubble caps to be used per tray.

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Q. Pick out the wrong statement about distillation operation

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Q. Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

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Q. Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.

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Q. Ratio of tube length to shell diameter for a shell and tube heat exchanger is

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