Heat Transfer The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m². The flux, when the element temperature is increased to 1000°C for the same furnace temperature is 12.0 kW/m² 11.2 kW/m² 16.5 kW/m² 14.6 kW/m² 12.0 kW/m² 11.2 kW/m² 16.5 kW/m² 14.6 kW/m² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The units of resistance to heat transfer is J.m⁻¹.K⁻¹ J.m⁻².K⁻¹ W.m⁻².K⁻¹ W⁻¹m²K J.m⁻¹.K⁻¹ J.m⁻².K⁻¹ W.m⁻².K⁻¹ W⁻¹m²K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Presence of a non-condensing gas in a condensing vapour decreases thermal resistance is desirable to increase the film co-efficient None of the listed here increases the rate of condensation decreases thermal resistance is desirable to increase the film co-efficient None of the listed here increases the rate of condensation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ? Sphere Plate Cube All of these Sphere Plate Cube All of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a heat exchanger, one transfer unit means Both A and B A section of the exchanger in which change in temperature of one stream equals the average driving force in the section None of these The size of the exchanger in which heat transfer rate is 1 kcal/hr Both A and B A section of the exchanger in which change in temperature of one stream equals the average driving force in the section None of these The size of the exchanger in which heat transfer rate is 1 kcal/hr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A sphere of radius 'R₁' is enclosed in a sphere of radius 'R₂'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is 1 (R₁/R₂)2 R₂/(R₁+R₂) 1 (R₁/R₂)2 R₂/(R₁+R₂) ANSWER DOWNLOAD EXAMIANS APP
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