In the design of a paddle agitator, the ratiois normally taken as

More Questions from Process Equipment and Plant Design

• In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is
• __________ is the determining factor for the number of bubble caps to be used per tray.
• At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure
• If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of
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• for a Tee (used as elbow, entering branch) would be
• 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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• Brass valves are usually made for pipe sizes __________ inches.
• Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

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