Process Equipment and Plant Design Questions

• The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.
• The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.
• Maximum allowable vapour velocity in a bubble cap tower is determined by the
• Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency
• Pick out the wrong statement pertaining to a shell and tube heat exchanger.
• Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around
• 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.
• For a given design of bubble cap, the number of bubble caps to be used per tray is set by the
• Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the
• Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if
• Oxygen carrying pipelines in chemical industries are coloured with __________ colour.
• Which of the following lengths of heat exchanger tubes are normally not used in practice?
• Height of the flights in the rotary drier is in the range of
• In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.
• In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.
• Reflux ratio variation in a distillation column is between
• Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be
• In condenser, the cooling water is passed in the tube side in a pass arrangement, because
• Longitundinal stress induced in a thin walled cylindrical storage vessel is
• A pipe is generally made of circular cross-section, because a circular cross-section has the