Heat and Mass Transfer Which of the following has least value of conductivity? Glass Air Plastic Water Glass Air Plastic Water ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by Hr (time) °C (temperature) K.cal (heat) Sq. m (area) Hr (time) °C (temperature) K.cal (heat) Sq. m (area) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is valid for Regular surfaces having non-uniform temperature gradients One dimensional cases only Three dimensional cases only Two dimensional cases only Regular surfaces having non-uniform temperature gradients One dimensional cases only Three dimensional cases only Two dimensional cases only ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following is expected to have highest thermal conductivity? Water Solid ice Steam Melting ice Water Solid ice Steam Melting ice ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following would lead to a reduction in thermal resistance? In radiation, increasing the temperature and reducing the emissivity. All of these In conduction, reduction in the thickness of the material and an increase in thermal conductivity. In convection, stirring of the fluid and cleaning the heating surface. In radiation, increasing the temperature and reducing the emissivity. All of these In conduction, reduction in the thickness of the material and an increase in thermal conductivity. In convection, stirring of the fluid and cleaning the heating surface. ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity) X = 0, a + p = 1 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 = 1 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
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