Heat and Mass Transfer An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m²). The critical thickness of insulation will be 160 mm 25 mm 40 mm 800 mm 160 mm 25 mm 40 mm 800 mm ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following has maximum value of thermal conductivity? Aluminium Steel Brass Copper Aluminium Steel Brass Copper ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The insulation ability of an insulator with the presence of moisture would Increase May increase/decrease depending on temperature and thickness of insulation Decrease Remain unaffected Increase May increase/decrease depending on temperature and thickness of insulation Decrease Remain unaffected ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The amount of radiation mainly depends upon the Temperature of the body Nature of the body All of these Type of surface of the body Temperature of the body Nature of the body All of these Type of surface of the body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium. Hot body to cold body Cold body to hot body Larger body to smaller body Smaller body to larger body Hot body to cold body Cold body to hot body Larger body to smaller body Smaller body to larger body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following property of air does not increase with rise in temperature? Thermal diffusivity Thermal conductivity Density Dynamic viscosity Thermal diffusivity Thermal conductivity Density Dynamic viscosity ANSWER DOWNLOAD EXAMIANS APP
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