Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because Heat transfer co-efficient are high There is no risk of contamination There is no mist formation Cost of equipment is lower Heat transfer co-efficient are high There is no risk of contamination There is no mist formation Cost of equipment is lower 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 The top tube sheet fixed and the bottom tube-sheet floating Both the tube sheets floating The top tube sheet floating and bottom tube sheet fixed Both the tube sheets fixed The top tube sheet fixed and the bottom tube-sheet floating Both the tube sheets floating The top tube sheet floating and bottom tube sheet fixed ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Reynolds Both A & B Prandtl & Grashoff Grashoff Reynolds Both A & B Prandtl & Grashoff Grashoff 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 1 <1 Zero >1 1 <1 Zero ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multipass heat exchangers are used For low heat load To reduce the pressure drop To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication For low heat load To reduce the pressure drop To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid. Perimeter to surface area Volume to surface area Surface area to volume Surface area to perimeter Perimeter to surface area Volume to surface area Surface area to volume Surface area to perimeter ANSWER DOWNLOAD EXAMIANS APP
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