Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature. Remains unchanged May increase or decrease; depends on the liquid Decreases Increases Remains unchanged May increase or decrease; depends on the liquid Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The units of resistance to heat transfer is W⁻¹m²K W.m⁻².K⁻¹ J.m⁻¹.K⁻¹ J.m⁻².K⁻¹ W⁻¹m²K W.m⁻².K⁻¹ J.m⁻¹.K⁻¹ J.m⁻².K⁻¹ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multipass heat exchangers are used To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication To reduce the pressure drop For low heat load To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication To reduce the pressure drop For low heat load ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient May increase or decrease; depends on the feed Decreases Increases Is not affected May increase or decrease; depends on the feed Decreases Increases Is not affected ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately 50 37 45 32 50 37 45 32 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the Sum of all resistances Average of all resistances Minimum resistance presents in the series Maximum resistance in the series Sum of all resistances Average of all resistances Minimum resistance presents in the series Maximum resistance in the series ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS