Process Equipment and Plant Design Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the Working stress to ultimate stress None of these Ultimate stress to breaking stress Ultimate stress to working stress Working stress to ultimate stress None of these Ultimate stress to breaking stress Ultimate stress to working stress 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 = 24.6 (Δp/μ) Η = 1.66 - 0.25 log μ Η = 0.25 log μ - 1.67 Η = 17 - 61.1 log μ Η = 24.6 (Δp/μ) Η = 1.66 - 0.25 log μ Η = 0.25 log μ - 1.67 Η = 17 - 61.1 log μ ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator 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 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 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger? 75% cut segmental baffle Disk and doughnut baffle Orifice baffle 25% cut segmental baffle 75% cut segmental baffle Disk and doughnut baffle Orifice baffle 25% cut segmental baffle ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness. Four times Equal to Twice Half Four times Equal to Twice Half ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times. Decrease by 22 Increase by 21.6 None of these Increase by 1.8 Decrease by 22 Increase by 21.6 None of these Increase by 1.8 ANSWER DOWNLOAD EXAMIANS APP
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