Heat Transfer Nucleate boiling is promoted On rough surfaces In the absence of agitation On polished surfaces None of these On rough surfaces In the absence of agitation On polished surfaces None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At constant temperature, the thermal conductivities of gases __________ with rise in pressure. May increase or decrease; depends on the pressure Remain unchanged Increase Decrease May increase or decrease; depends on the pressure Remain unchanged Increase Decrease ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A diathermaneous substance __________ the thermal radiation completely. Reflects Absorbs Transmits None of these Reflects Absorbs Transmits None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Absorptivity and refletivity of a perfect black body are respectively 0 and 0.5 0 and 1 1 and 0 1 and ? 0 and 0.5 0 and 1 1 and 0 1 and ? ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Film boiling occurs at __________ pressure. atmospheric very high negative none of the listed here atmospheric very high negative none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchangers operating, when the asymptotic range is reached, Results in abruptly increased velocity Results in making part of the heating surface inactive None of these Provide very large heat transfer co-efficient Results in abruptly increased velocity Results in making part of the heating surface inactive None of these Provide very large heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
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