Heat Transfer Which of the following has the lowest Prandtl number? Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) Water Transformer oil Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) Water Transformer oil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) 2K/h0 h0/K h0/2K K/h0 2K/h0 h0/K h0/2K K/h0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The sum of reflectivity and absorptivity for an opaque body is equal to 1 0.5 2 1 0.5 2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A diathermaneous substance __________ the thermal radiation completely. None of these Reflects Transmits Absorbs None of these Reflects Transmits Absorbs ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Air is best heated with steam in a heat exchanger of 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 double pipe type with fin on air side plate type ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids? At high fluid velocity None of these When fluid flows past a smooth surface At low velocity At high fluid velocity None of these When fluid flows past a smooth surface At low velocity ANSWER DOWNLOAD EXAMIANS APP
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