Heat Transfer The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as Ha = hL Ha= 5hL Ha = 0.8hL Ha = 2hL Ha = hL Ha= 5hL Ha = 0.8hL Ha = 2hL ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At constant temperature, the thermal conductivities of gases __________ with rise in pressure. Remain unchanged Increase Decrease May increase or decrease; depends on the pressure Remain unchanged Increase Decrease May increase or decrease; depends on the pressure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number is the reciprocal of Thermal diffusivity x Momentum Thermal diffusivity x Mass diffusivity Mass diffusivity x Momentum diffusivity Thermal diffusivity/Momentum diffusivity Thermal diffusivity x Momentum Thermal diffusivity x Mass diffusivity Mass diffusivity x Momentum diffusivity Thermal diffusivity/Momentum diffusivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the Higher condensing film co-efficient is desired Condensate is corrosive in nature Lower pressure drop through the exchanger is desired Temperature of the incoming vapor is very high Higher condensing film co-efficient is desired Condensate is corrosive in nature Lower pressure drop through the exchanger is desired Temperature of the incoming vapor is very high ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid. Surface area to volume Surface area to perimeter Volume to surface area Perimeter to surface area Surface area to volume Surface area to perimeter Volume to surface area Perimeter to surface area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Evaporation by thermocompression results in the None of these Saving of steam Realisation of multiple effect economy in a single effect Both A and B None of these Saving of steam Realisation of multiple effect economy in a single effect Both A and B ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS