Heat and Mass Transfer The natural convection air cooled condensers are used in Domestic refrigerators Room air conditioners Water coolers All of these Domestic refrigerators Room air conditioners Water coolers All of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of solid metals with rise in temperature normally May increase or decrease depending on temperature Decreases Remain constant Increases May increase or decrease depending on temperature Decreases Remain constant Increases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following has maximum value of thermal conductivity? Steel Copper Brass Aluminium Steel Copper Brass Aluminium ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be Two Four One Three Two Four One Three ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Stefan's law Wien's law Planck's law Kirchhoff's law Stefan's law Wien's law Planck's law Kirchhoff's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The heat transfer takes place according to Kirchhoff's law Zeroth law of thermodynamics First law of thermodynamics Second law of thermodynamics Kirchhoff's law Zeroth law of thermodynamics First law of thermodynamics Second law of thermodynamics ANSWER DOWNLOAD EXAMIANS APP
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