Process Equipment and Plant Design Steam is preferred to be used as a heating medium in heat exchangers, because of its Low cost High latent heat High film co-efficient Non-corrosive condensate Low cost High latent heat High film co-efficient Non-corrosive condensate ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used? 1 (0.8)0.5 0.8 0.9 1 (0.8)0.5 0.8 0.9 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Spherical shaped pressure vessel is considered to be the most ideal, because it can Be designed without wind load considerations Be fabricated very easily Withstand higher pressure for a given metallic shell thickness Be supported very easily Be designed without wind load considerations Be fabricated very easily Withstand higher pressure for a given metallic shell thickness Be supported very easily ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases. Running cost of steam for reboiler Running cost of cooling water for condenser Fixed charges initially Vapour & liquid load both Running cost of steam for reboiler Running cost of cooling water for condenser Fixed charges initially Vapour & liquid load both ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer co-efficient Results in higher shell side pressure drop Can accomodate less number of tubes for a given shell diameter Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell side fluid Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer co-efficient Results in higher shell side pressure drop Can accomodate less number of tubes for a given shell diameter Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell side fluid ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always Less than arithmetic mean value Both B & C More than arithmetic mean value More than geometric mean value Less than arithmetic mean value Both B & C More than arithmetic mean value More than geometric mean value ANSWER DOWNLOAD EXAMIANS APP
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