Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An insulator should have Low thermal conductivity High thermal conductivity A porous structure Less resistance to heat flow Low thermal conductivity High thermal conductivity A porous structure Less resistance to heat flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is >1 Zero 1 <1 >1 Zero 1 <1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires More space Lower maintenance cost None of these Less heating surface More space Lower maintenance cost None of these Less heating surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as Q ∝ T⁴ None of these Q ∝ T³ Q ∝ T² Q ∝ T⁴ None of these Q ∝ T³ Q ∝ T² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a multiple effect evaporator, the effect of boiling point elevation is to reduce the economy increase the economy reduce the capacity all of the listed here reduce the economy increase the economy reduce the capacity all of the listed here ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS