Heat and Mass Transfer Depending on the radiating properties, a body will be black when(Where a = absorptivity, p = reflectivity, X = transmissivity.) X = 0, a + p = 0 P= 1, T = 0 and a = 0 P = 0, x = 0 and a = 1 P = 0, x = 1 and a = 0 X = 0, a + p = 0 P= 1, T = 0 and a = 0 P = 0, x = 0 and a = 1 P = 0, x = 1 and a = 0 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by K.cal (heat) Hr (time) Sq. m (area) °C (temperature) K.cal (heat) Hr (time) Sq. m (area) °C (temperature) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Metals are good conductors of heat because They contain free electrons Their atoms are relatively far apart They have high density Their atoms collide frequently They contain free electrons Their atoms are relatively far apart They have high density Their atoms collide frequently ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction gives the heat flow for Irregular surfaces Nonuniform temperature surfaces Two dimensional cases only One dimensional cases only Irregular surfaces Nonuniform temperature surfaces Two dimensional cases only One dimensional cases only ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by Forced convection Convection Free convection Radiation Forced convection Convection Free convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Wien's law, the wavelength corresponding to maximum energy is proportion to F I² T Absolute temperature (T) F I² T Absolute temperature (T) ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS