Heat Transfer Log mean temperature difference (LMTD) cannot be used, if heat transfer co-efficient over the entire heat exchanger is not constant the heat capacity is not constant and there is a phase change. there exists an unsteady state none of the listed here heat transfer co-efficient over the entire heat exchanger is not constant the heat capacity is not constant and there is a phase change. there exists an unsteady state none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivity of a conducting solid material depends upon its None of the listed here porosity both temperature & porosity temperature None of the listed here porosity both temperature & porosity temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be 15 min 51 min 22 min 44 min 15 min 51 min 22 min 44 min ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The purpose of floating head in a heat exchanger is to Avoid buckling of tubes Facilitate its lengthening, if needed Provide support for tubes Decrease the pressure drop Avoid buckling of tubes Facilitate its lengthening, if needed Provide support for tubes Decrease the pressure drop ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is 333W/m².K 287 W/m².K 894W/m².K 1200W/m².K 333W/m².K 287 W/m².K 894W/m².K 1200W/m².K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Graetz number is given by kL/mCp mCp/kL kμ/mCp mCp/kμ kL/mCp mCp/kL kμ/mCp mCp/kμ ANSWER DOWNLOAD EXAMIANS APP
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