Q. Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method

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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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