Heat Transfer With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer Decreases Increases Remains unaffected Increases exponentially Decreases Increases Remains unaffected Increases exponentially ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Both solids & liquids Liquids Solids Gases Both solids & liquids Liquids Solids Gases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchanger tubes are never made of Plain carbon steel Lead Copper Stainless steel Plain carbon steel Lead Copper Stainless steel ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be None, A is just a number W/m.k W/m.k² W/m None, A is just a number W/m.k W/m.k² W/m ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade? 35.5 48.25 81.25 43.75 35.5 48.25 81.25 43.75 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Natural convection is characterised by Prandtl number Reynolds number Peclet number Grashhoff number Prandtl number Reynolds number Peclet number Grashhoff number ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS