Heat and Mass Transfer Cork is a good insulator because it has Free electrons Low density Porous body Atoms colliding frequency Free electrons Low density Porous body Atoms colliding frequency ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Pick up the wrong case. Heat flowing from one side to other depends directly on Thickness Temperature difference Time Face area Thickness Temperature difference Time Face area ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of solid metals with rise in temperature normally Increases Decreases Remain constant May increase or decrease depending on temperature Increases Decreases Remain constant May increase or decrease depending on temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The heat transfer by conduction through a thick sphere is given by Q = 8πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 4πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 2πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 6πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 8πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 4πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 2πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 6πkr1 r2 (T1 - T2)/ (r2 - r1) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The value of the wave length for maximum emissive power is given by Wine’s law Planck’s law Kirchhoff’s law Stefan’s law Wine’s law Planck’s law Kirchhoff’s law Stefan’s law ANSWER DOWNLOAD EXAMIANS APP
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