Process Equipment and Plant Design Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer). 250 750 650 450 250 750 650 450 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design 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. Three fourth One fourth Half Equal to Three fourth One fourth Half Equal to ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of (1.2)3/2 (1.2)5/3 (1.2)2/3 (1.2)3/5 (1.2)3/2 (1.2)5/3 (1.2)2/3 (1.2)3/5 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Overall tray efficiency of a distillation column is the ratio of the number of Ideal trays required to the number of real trays required Real trays required to the number of ideal trays required Overall gas transfer units to the number of ideal trays required None of these Ideal trays required to the number of real trays required Real trays required to the number of ideal trays required Overall gas transfer units to the number of ideal trays required None of these ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter. l/5th l/30th l/50th l/15th l/5th l/30th l/50th l/15th ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The necessary wall thickness for a metallic storage vessel is a function of the Diameter of the vessel All of these Ultimate tensile strength (or yield point) of the material and operating temperature Operating pressure and welding/joint efficiency Diameter of the vessel All of these Ultimate tensile strength (or yield point) of the material and operating temperature Operating pressure and welding/joint efficiency ANSWER DOWNLOAD EXAMIANS APP
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