Heat Transfer In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate. Logarithmic Arithmetic Either A, B or C Geometric Logarithmic Arithmetic Either A, B or C Geometric ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchangers operating, when the asymptotic range is reached, Results in making part of the heating surface inactive Provide very large heat transfer co-efficient None of these Results in abruptly increased velocity Results in making part of the heating surface inactive Provide very large heat transfer co-efficient None of these Results in abruptly increased velocity 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 Higher condensing film co-efficient is desired Lower pressure drop through the exchanger is desired Temperature of the incoming vapor is very high Condensate is corrosive in nature Higher condensing film co-efficient is desired Lower pressure drop through the exchanger is desired Temperature of the incoming vapor is very high Condensate is corrosive in nature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping Both the tube sheets fixed Both the tube sheets floating The top tube sheet fixed and the bottom tube-sheet floating The top tube sheet floating and bottom tube sheet fixed Both the tube sheets fixed Both the tube sheets floating The top tube sheet fixed and the bottom tube-sheet floating The top tube sheet floating and bottom tube sheet fixed ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is Shell and tube heat exchanger with air inside tubes and steam on shell side Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air on shell side and steam inside tubes Finned tube heat exchanger with air inside and steam outside Shell and tube heat exchanger with air inside tubes and steam on shell side Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air on shell side and steam inside tubes Finned tube heat exchanger with air inside and steam outside ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature. May increase or decrease; depends on the liquid Remains unchanged Increases Decreases May increase or decrease; depends on the liquid Remains unchanged Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
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