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 None of these Vacuum Backward feed High pressure None of these Vacuum Backward feed ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred None of these By heating an intermediate material (like chequor bricks) and then heating the air from this hot material By direct contact of hot flue gas with air Through a metallic wall None of these By heating an intermediate material (like chequor bricks) and then heating the air from this hot material By direct contact of hot flue gas with air Through a metallic wall ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer During crystallisation, formation of crystal can occur in __________ solution only. Saturated Undersaturated Supersaturated All of these Saturated Undersaturated Supersaturated All of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because There is no mist formation Heat transfer co-efficient are high There is no risk of contamination Cost of equipment is lower There is no mist formation Heat transfer co-efficient are high There is no risk of contamination Cost of equipment is lower ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the thermal conductivity of steel Remains unchanged Increases Increases exponentially Decreases Remains unchanged Increases Increases exponentially Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Liquids Solids Gases Both solids & liquids Liquids Solids Gases Both solids & liquids ANSWER DOWNLOAD EXAMIANS APP
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