Heat Transfer Solid angle subtended by the finite surface at the radiating element is proportional to the square of the distance between surfaces called the angle of vision called the view factor. expressed in terms of radians proportional to the square of the distance between surfaces called the angle of vision called the view factor. expressed in terms of radians ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nucleate boiling is promoted In the absence of agitation On rough surfaces On polished surfaces None of these In the absence of agitation On rough surfaces On polished surfaces None of these 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 55.5 555 0.55 0.15 55.5 555 0.55 0.15 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fouling factor None of these Is a dimensionless quantity Does not provide a safety factor for design Accounts for additional resistances to heat flow None of these Is a dimensionless quantity Does not provide a safety factor for design Accounts for additional resistances to heat flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of 6.1 37 1.74 1 6.1 37 1.74 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent. 18 1 26 7 18 1 26 7 ANSWER DOWNLOAD EXAMIANS APP
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