Q. Which of the following is used to set the diameter of the distillation column ?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. An underdesigned steam trap will

View solution

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

View solution

Q. Needle valves are generally not used for

View solution

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

View solution

Q. Pick out the wrong statement.

View solution

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

View solution

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

View solution

Q. Accidents in chemical plants are mostly due to

View solution

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

View solution

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

View solution

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

View solution

Q. Pick out the wrong statement about distillation operation

View solution

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.

View solution