Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as None of these Q ∝ T² Q ∝ T³ Q ∝ T⁴ None of these Q ∝ T² Q ∝ T³ Q ∝ T⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because There is no mist formation There is no risk of contamination Heat transfer co-efficient are high Cost of equipment is lower There is no mist formation There is no risk of contamination Heat transfer co-efficient are high Cost of equipment is lower ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 10 minutes 5 minutes 20 minutes 40 minutes 10 minutes 5 minutes 20 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it All of these Is easy to operate and maintain Occupies smaller space Is more economical All of these Is easy to operate and maintain Occupies smaller space Is more economical ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law. Hyperbolic Linear Parabolic Logarithmic Hyperbolic Linear Parabolic Logarithmic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the minimum thermal conductivity? Tar Carbon black Nitrogen Steel Tar Carbon black Nitrogen Steel ANSWER DOWNLOAD EXAMIANS APP
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