Heat Transfer Nusselt number is the ratio of the None of these Temperature difference to the temperature gradient at the wall Heat flux at the wall to that across the entire pipe Temperature gradient of the wall to that across the entire pipe None of these Temperature difference to the temperature gradient at the wall Heat flux at the wall to that across the entire pipe Temperature gradient of the wall to that across the entire pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The purpose of floating head in a heat exchanger is to Provide support for tubes Facilitate its lengthening, if needed Avoid buckling of tubes Decrease the pressure drop Provide support for tubes Facilitate its lengthening, if needed Avoid buckling of tubes Decrease the pressure drop ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) 1/CE C/E CE E/C 1/CE C/E CE E/C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Grashoff number, which is defined as g . β(Ts - T∞) ρ². L³/μ², is proportional to the ratio of buoyancy force to __________ force. Elastic Inertial Viscous None of these Elastic Inertial Viscous 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 0.55 55.5 0.15 555 0.55 55.5 0.15 555 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 1.74 1 6.1 37 1.74 1 6.1 37 ANSWER DOWNLOAD EXAMIANS APP
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