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 The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the None of these Buoyancy of the bubbles produced at active nucleation site Temperature gradient produced due to density difference Existence of thermal boundary layer None of these Buoyancy of the bubbles produced at active nucleation site Temperature gradient produced due to density difference Existence of thermal boundary layer ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius 'r' of insulation on a pipe is given by r = k/2h r = 2k/h r = h/k r = k/h r = k/2h r = 2k/h r = h/k r = k/h ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the highest thermal conductivity ? Water Black Silver Air Water Black Silver Air ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A __________ evaporator employs an annular downtake. None of these Horizontal Basket type Long tube vertical None of these Horizontal Basket type Long tube vertical ANSWER DOWNLOAD EXAMIANS APP
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