Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Remains constant Decreases Increases May increase or decrease ; depends on the material Remains constant Decreases Increases May increase or decrease ; depends on the material ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer Decreases Remains unaffected Increases Increases exponentially Decreases Remains unaffected Increases Increases exponentially ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law. Temperature of the body Nature of the body Wavelength of radiation None of these Temperature of the body Nature of the body Wavelength of radiation None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A dephlegmator is a Double pipe heat exchanger Vacuum evaporator Total condenser Partial condenser Double pipe heat exchanger Vacuum evaporator Total condenser Partial condenser ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multiple effect evaporation accounts for Lower operating costs Investment economy Steam economy None of these Lower operating costs Investment economy Steam economy None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the absorptivity of a black body? 0.95 1 0.78 0.95 1 0.78 ANSWER DOWNLOAD EXAMIANS APP
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