Heat Transfer What is the unit of thermal conductivity ? Kcal/hr. °C Kcal/hr. m² °C Kcal/hr.m.°C Kcal/hr.m Kcal/hr. °C Kcal/hr. m² °C Kcal/hr.m.°C Kcal/hr.m ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a Non-dimensional factor None of these Factor of safety Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Non-dimensional factor None of these Factor of safety Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is 0.15 555 55.5 0.55 0.15 555 55.5 0.55 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate. Arithmetic Logarithmic Either A, B or C Geometric Arithmetic Logarithmic Either A, B or C Geometric ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? l to 50 1 to 103 0.6 to 120 0.06 to 120 l to 50 1 to 103 0.6 to 120 0.06 to 120 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nucleate boiling is promoted In the absence of agitation None of these On rough surfaces On polished surfaces In the absence of agitation None of these On rough surfaces On polished surfaces ANSWER DOWNLOAD EXAMIANS APP
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