Process Equipment & Plant Design Mcqs for Chemical


Q.  The clearance between two tubes in a shell and tube heat exchanger is known as ‘ligament’, whose minimum value is _____________ the outside diameter of the tube, but in no case it should be less than 4.5 mm?

a. Equal to
b. Half
c. One fourth
d. Three fourth


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The ratio of down take area to cross-sectional area of the tube, for calandria type evaporator ranges from_________________?
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MCQs:  The thickness of heat transfer plates used in the plate type heat exchanger ranges from _____________ mm, pressed in a single piece provided with grooves & corrugations?
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MCQs:  Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is _____________ the longitudinal stress?
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MCQs:  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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MCQs:  For turbine agitator, the impeller diameter is about_________________?
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MCQs:  Commercial packed scrubbers are normally designed for a pressure drop range of ______________ mm water column per metre of packed height?
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MCQs:  The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is___________________?
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MCQs:  Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling ?
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MCQs:  Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to _____________________?
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MCQs:  The most common standard size of bubble caps used in industrial operation is___________________?
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MCQs:  Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to ____________________?
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MCQs:  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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MCQs:  Liquid gradient over the tray results due to the___________________?
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MCQs:  The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?
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MCQs:  The slope of the feed line in distillation operation is given by (where, q = fraction of the feed stream that is liquid ?
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MCQs:  ____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?
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MCQs:  The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?
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MCQs:  Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
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MCQs:  Which of the following packing materials provides for maximum mass transfer ?
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MCQs:  The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?
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