Heat Transfer Double pipe heat exchangers are used because it occupies less floor area when heat transfer area required is very low when heat transfer area required is very high because it is less costly because it occupies less floor area when heat transfer area required is very low when heat transfer area required is very high because it is less costly ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In counter flow compared to parallel flow, Less surface area is required for a given heat transfer rate More surface area is required for a given heat transfer rate LMTD is greater Both A and B Less surface area is required for a given heat transfer rate More surface area is required for a given heat transfer rate LMTD is greater Both A and B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Natural convection is characterised by Peclet number Grashhoff number Reynolds number Prandtl number Peclet number Grashhoff number Reynolds number Prandtl number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A multiple effect evaporator as compared to a single effect evaporator of the same capacity has Lower steam economy Higher steam economy Lower heat transfer area Higher solute concentration in the product Lower steam economy Higher steam economy Lower heat transfer area Higher solute concentration in the product ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer It is not preferable to use superheated steam in evaporators, because of its very high pressure none of the listed here low film co-efficient high temperature high pressure none of the listed here low film co-efficient high temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator. May increase or decrease, depends on the vacuum Remains constant Decreases Increases May increase or decrease, depends on the vacuum Remains constant Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
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