Heat Transfer Kirchoff's law is applicable to Total radiation only Only volumes and not to surfaces Monochromatic radiation only Both A and B Total radiation only Only volumes and not to surfaces Monochromatic radiation only Both A and B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the temperature gradient at the wall to Temperature difference Heat flux None of these That across the entire pipe Temperature difference Heat flux None of these That across the entire pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Electro-magnetic spectrum range, which is important for radiation varies from __________ microns. 100 to 1000 1 to 100 0.5 to 50 10 to 100 100 to 1000 1 to 100 0.5 to 50 10 to 100 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Heat transfer co-efficient Temperature gradient Heat transfer area Mechanical strength of the equipment Heat transfer co-efficient Temperature gradient Heat transfer area Mechanical strength of the equipment ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With the increase of temperature, the Col-burn jH factor Remains unchanged May increase or decrease ; depending on temperature Decreases Increases Remains unchanged May increase or decrease ; depending on temperature Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is 48.7 71.2 63.8 77.2 48.7 71.2 63.8 77.2 ANSWER DOWNLOAD EXAMIANS APP
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