Process Equipment and Plant Design Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor. 43961 35-40 15-20 30-35 43961 35-40 15-20 30-35 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity. 45 95 80 60 45 95 80 60 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by Decrease in gas solubility for absorbers All of these An increase in liquid viscosity An increase in relatived volatility for rectification columns Decrease in gas solubility for absorbers All of these An increase in liquid viscosity An increase in relatived volatility for rectification columns ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is Less More Same More or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein Less More Same More or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids. 16 28 38 19 16 28 38 19 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)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 (1.2)3/2 ANSWER DOWNLOAD EXAMIANS APP
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