Heat Transfer Dropwise condensation of steam on cooling surface is promoted An oily surface When both the steam and the tube are clean Only in presence of air None of these An oily surface When both the steam and the tube are clean Only in presence of air None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number is the ratio of Thermal diffusivity to mass diffusivity Momentum diffusivity to thermal diffusivity Thermal diffusivity to momentum diffusivity Momentum diffusivity to mass diffusivity Thermal diffusivity to mass diffusivity Momentum diffusivity to thermal diffusivity Thermal diffusivity to momentum diffusivity Momentum diffusivity to mass diffusivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer During crystallisation, formation of crystal can occur in __________ solution only. Supersaturated All of these Undersaturated Saturated Supersaturated All of these Undersaturated Saturated ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Gases Liquids Solids Both solids & liquids Gases Liquids Solids Both solids & liquids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is Less Some More Either more or less ; depends on the nature of vapor Less Some More Either more or less ; depends on the nature of vapor ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The film thickness for laminar film condensation on vertical surface __________ from top to bottom. And the surface conductance increase Cummulatively decreases Cummulatively increases Remains constant And the surface conductance increase Cummulatively decreases Cummulatively increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
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