Heat Transfer Choose the most important factor on which the heat conducted through a wall in a unit time will depend on? Temperature difference between the two surfaces of the wall Thickness of the wall Material of the wall Area of the wall perpendicular to heat flow Temperature difference between the two surfaces of the wall Thickness of the wall Material of the wall Area of the wall perpendicular to heat flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? Fireclay refractory followed by aluminium sheet 85% magnesia cement and glass wool Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet 85% magnesia cement and glass wool Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For an ideal black body Emissivity = 0 Transmissivity = 1 Absorptivity = 1 Reflectivity = 1 Emissivity = 0 Transmissivity = 1 Absorptivity = 1 Reflectivity = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are used when heat transfer area required is very low because it occupies less floor area when heat transfer area required is very high because it is less costly when heat transfer area required is very low because it occupies less floor area when heat transfer area required is very high because it is less costly ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the Average of all resistances Minimum resistance presents in the series Maximum resistance in the series Sum of all resistances Average of all resistances Minimum resistance presents in the series Maximum resistance in the series Sum of all resistances ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe ) K/h0 hi/K 2K/h0 2hi/K K/h0 hi/K 2K/h0 2hi/K ANSWER DOWNLOAD EXAMIANS APP
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