Process Equipment and Plant Design A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle Employs high velocity, high heat transfer rate and less heating surface requirement Both B & C Is economical in operation Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle Employs high velocity, high heat transfer rate and less heating surface requirement Both B & C Is economical in operation ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate. 8 4 2 1/2 8 4 2 1/2 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes Are easier to clean None of these Are less prone to fouling Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less Are easier to clean None of these Are less prone to fouling Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Thin spherical shells subjected to internal pressure, develop __________ stresses. Circumferential Radial Both A & B Neither A nor B Circumferential Radial Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as 0.75 0.01 0.3 0.95 0.75 0.01 0.3 0.95 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to 5 cms 40% of the I.D. of the shell 25 cms I.D. of the shell 5 cms 40% of the I.D. of the shell 25 cms I.D. of the shell ANSWER DOWNLOAD EXAMIANS APP
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