Heat Transfer The inside heat transfer co-efficient in case of turbulent flow of liquid in the tube side in a 1-2 shell and tube heat exchanger is increased by __________ times, when the number of tube passes is increased to 8. 20.4 40.8 40.4 20.8 20.4 40.8 40.4 20.8 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case, Both will absorb equal amount of radiation from the surrounding in the beginning Both B & C Both the spheres will emit equal amount of radiation per unit time in the beginning The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant Both will absorb equal amount of radiation from the surrounding in the beginning Both B & C Both the spheres will emit equal amount of radiation per unit time in the beginning The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam side heat transfer co-efficient in an evaporator is in the range of __________ kcal/hr.m²°C. 1000-1500 18537 5000-15000 100-500 1000-1500 18537 5000-15000 100-500 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by Forced convection Natural convection Transient conduction Steady state conduction Forced convection Natural convection Transient conduction Steady state conduction ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by Painting the surface white (with aluminium paint) Giving the surface a mirror finish Painting the surface black Roughening the surface Painting the surface white (with aluminium paint) Giving the surface a mirror finish Painting the surface black Roughening the surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nucleate boiling is promoted On rough surfaces In the absence of agitation None of these On polished surfaces On rough surfaces In the absence of agitation None of these On polished surfaces ANSWER DOWNLOAD EXAMIANS APP
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