Heat Transfer Dropwise condensation of steam on cooling surface is promoted 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 An oily surface When both the steam and the tube are clean ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A multiple effect evaporator as compared to a single effect evaporator of the same capacity has Lower steam economy Higher solute concentration in the product Higher steam economy Lower heat transfer area Lower steam economy Higher solute concentration in the product Higher steam economy Lower heat transfer area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface) 1/U₁ - 1/U₂ 1/U₂ - 1/U₁ U₁ - U₂ U₂ - U₁ 1/U₁ - 1/U₂ 1/U₂ - 1/U₁ U₁ - U₂ U₂ - U₁ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by Εx + εy 1/εx + 1/εy Εx . εy (εx + εy)/(εx + εy - εx . εy) Εx + εy 1/εx + 1/εy Εx . εy (εx + εy)/(εx + εy - εx . εy) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Stefan-Boltzman constant depends on the Surface None of these Temperature Medium Surface None of these Temperature Medium ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is 26.8 25 40.5 34.4 26.8 25 40.5 34.4 ANSWER DOWNLOAD EXAMIANS APP
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