Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos 85% magnesia cement and glass wool Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos 85% magnesia cement and glass wool ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number for most of dry gases is about 150 0.001 0.72 70 150 0.001 0.72 70 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has maximum thermal conductivity? Nitrogen Tar Coal Iron Nitrogen Tar Coal Iron ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? l to 50 0.06 to 120 0.6 to 120 1 to 103 l to 50 0.06 to 120 0.6 to 120 1 to 103 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. High pressure Backward feed Vacuum None of these High pressure Backward feed Vacuum None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivity of a gas at low density, __________ with increase in temperature. Remains unchanged Increases Decreases May increase or decrease; depends on the gas Remains unchanged Increases Decreases May increase or decrease; depends on the gas ANSWER DOWNLOAD EXAMIANS APP
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