Process Equipment and Plant Design Which of the following is the best tube material from thermal conductivity point of view alone? Aluminium Stainless steel Carbon steel Copper Aluminium Stainless steel Carbon steel Copper ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is > 10 < 10 30 > 20 > 10 < 10 30 > 20 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. 38 28 16 19 38 28 16 19 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The maximum liquid gradient over a tray must not exceed Half the tray spacing 0.5" -1.25" 2"-3.5" 5" Half the tray spacing 0.5" -1.25" 2"-3.5" 5" ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 - 1.4 cp and relative volatility < 4) (where η = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) Η = 0.25 log μ - 1.67 Η = 1.66 - 0.25 log μ Η = 24.6 (Δp/μ) Η = 17 - 61.1 log μ Η = 0.25 log μ - 1.67 Η = 1.66 - 0.25 log μ Η = 24.6 (Δp/μ) Η = 17 - 61.1 log μ ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter. 1/20-1/30th 1/5-1/10th 1/10-1/15th 1/2 to 1/4th 1/20-1/30th 1/5-1/10th 1/10-1/15th 1/2 to 1/4th ANSWER DOWNLOAD EXAMIANS APP
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