Heat Transfer Air is best heated with steam in a heat exchanger of double pipe type with fin on air side plate type double pipe type with fin on steam side shell and tube type double pipe type with fin on air side plate type double pipe type with fin on steam side shell and tube type ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? Cotton followed by aluminium foil 85% magnesia cement and glass wool Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil 85% magnesia cement and glass wool Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is 1 >1 0 between 0 and 1 1 >1 0 between 0 and 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Kirchoff s law applies to __________ radiation None of the listed here monochromatic Both total & monochromatic total None of the listed here monochromatic Both total & monochromatic total ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Decreases Remains constant May increase or decrease ; depends on the material Increases Decreases Remains constant May increase or decrease ; depends on the material Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in porosity, the thermal conductivity of a solid substance May increase or decrease; depends on the solid Decreases Remains unchanged Increases May increase or decrease; depends on the solid Decreases Remains unchanged Increases ANSWER DOWNLOAD EXAMIANS APP
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