Process Equipment and Plant Design Questions

• In a shell and tube heat exchanger, the clearance of the tube is generally
• For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is
• In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to
• Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.
• For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell
• Maximum acceptable total liquid gradient over a tray is about __________ mm.
• The dust collection efficiency of a cyclone separator
• Accidents in chemical plants are mostly due to
• Steam is preferred to be used as a heating medium in heat exchangers, because of its
• The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
• Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.
• In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.
• Pick out the wrong statement about distillation operation
• Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.
• 1.2 to 3.8 cms is the value of the
• Movement of pipeline caused by thermal expansion is taken care by providing
• In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.
• Bubble cap tray is the most commonly used tray in large distillation column, because
• The necessary wall thickness for a metallic storage vessel is a function of the
• For identical operating conditions, the pressure drop over __________ tray is the highest out of the following.