Process Equipment and Plant Design In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio. 2.7 to 3 1.6 to 2 2.2 to 2.6 1.1 to 1.5 2.7 to 3 1.6 to 2 2.2 to 2.6 1.1 to 1.5 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if Wall thickness is > 30 mm Material of construction is high alloy steel Both B & C Plain carbon steel and cast iron parts are used Wall thickness is > 30 mm Material of construction is high alloy steel Both B & C Plain carbon steel and cast iron parts are used ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends. More than Either B or C; depends on maximum permissible internal pressure Equal to Less than More than Either B or C; depends on maximum permissible internal pressure Equal to Less than ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Larger depth of liquid on the trays of a distillation column Leads to high tray efficiency Both A & B Neither A nor B Results in higher pressure drop per tray Leads to high tray efficiency Both A & B Neither A nor B Results in higher pressure drop per tray ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is pD/2t pD/4t pD/3t pD/6t pD/2t pD/4t pD/3t pD/6t ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator Employs high velocity, high heat transfer rate and less heating surface requirement Both B & C Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle Is economical in operation Employs high velocity, high heat transfer rate and less heating surface requirement Both B & C Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle Is economical in operation ANSWER DOWNLOAD EXAMIANS APP
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