Heat Transfer Dropwise condensation of steam on cooling surface is promoted Only in presence of air An oily surface None of these When both the steam and the tube are clean Only in presence of air An oily surface None of these When both the steam and the tube are clean ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For an ideal black body Absorptivity = 1 Transmissivity = 1 Reflectivity = 1 Emissivity = 0 Absorptivity = 1 Transmissivity = 1 Reflectivity = 1 Emissivity = 0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is >1 0 between 0 and 1 1 >1 0 between 0 and 1 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids? When fluid flows past a smooth surface None of these At high fluid velocity At low velocity When fluid flows past a smooth surface None of these At high fluid velocity At low velocity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Evaporation by thermocompression results in the Saving of steam Both A and B None of these Realisation of multiple effect economy in a single effect Saving of steam Both A and B None of these Realisation of multiple effect economy in a single effect ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it Occupies smaller space All of these Is easy to operate and maintain Is more economical Occupies smaller space All of these Is easy to operate and maintain Is more economical ANSWER DOWNLOAD EXAMIANS APP
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