Heat Transfer The purpose of providing expansion bellows in the shell of tubular exchanger is to Account for the uneven expansion of shell and tube bundles Increase the heating load Facilitate increase of shell length, if needed Impart structural strength Account for the uneven expansion of shell and tube bundles Increase the heating load Facilitate increase of shell length, if needed Impart structural strength ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For small temperature difference, the heat transfer rate as per Newton's law of cooling is proportional to (where, Δt = excess temperature) Δt³ √Δt Δt² Δt Δt³ √Δt Δt² Δt ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are used when heat transfer area required is very low because it is less costly because it occupies less floor area when heat transfer area required is very high when heat transfer area required is very low because it is less costly because it occupies less floor area when heat transfer area required is very high ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The units of resistance to heat transfer is J.m⁻².K⁻¹ J.m⁻¹.K⁻¹ W.m⁻².K⁻¹ W⁻¹m²K J.m⁻².K⁻¹ J.m⁻¹.K⁻¹ W.m⁻².K⁻¹ W⁻¹m²K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the Condensate is corrosive in nature Higher condensing film co-efficient is desired Temperature of the incoming vapor is very high Lower pressure drop through the exchanger is desired Condensate is corrosive in nature Higher condensing film co-efficient is desired Temperature of the incoming vapor is very high Lower pressure drop through the exchanger is desired ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point elevation of an ideal solution Increases rapidly with temperature rise Decreases rapidly with temperature rise Both B and C In independent of pressure Increases rapidly with temperature rise Decreases rapidly with temperature rise Both B and C In independent of pressure ANSWER DOWNLOAD EXAMIANS APP
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