Process Equipment and Plant Design Questions

• Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing
• The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is
• The normal range of velocity of steam in pipes is __________ m/sec.
• Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.
• In the agitators, the power required will be changed with the increase of diameter of agitator (D) as
• With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT
• An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by
• What is the slope of the operating line in the stripping section of a distillation column?
• The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from
• A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
• In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D1 and D2 are I.D. of inner and outer pipes)
• Excessive liquid gradient on a tray may result in the
• In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σn are related by
• Rotary driers are most economically designed for the number of heat transfer units (HTU) from
• 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
• __________ liquor is best handled in a long tube vertical evaporator.
• The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.
• Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to
• The units of Young's modulus of elasticity and __________ are the same.
• The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from