Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Solids Liquids Gases Both solids & liquids Solids Liquids Gases Both solids & liquids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping The top tube sheet floating and bottom tube sheet fixed Both the tube sheets fixed The top tube sheet fixed and the bottom tube-sheet floating Both the tube sheets floating The top tube sheet floating and bottom tube sheet fixed Both the tube sheets fixed The top tube sheet fixed and the bottom tube-sheet floating Both the tube sheets floating ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the total emissivity of conductors Decreases linearly Increases Decreases Remains same Decreases linearly Increases Decreases Remains same ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Absorptivity and refletivity of a perfect black body are respectively 1 and 0 0 and 1 1 and ? 0 and 0.5 1 and 0 0 and 1 1 and ? 0 and 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that Material is anisotropic Boundary surfaces are isothermal Constant temperature gradient exists There is no internal heat generation Material is anisotropic Boundary surfaces are isothermal Constant temperature gradient exists There is no internal heat generation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivity of a gas at low density, __________ with increase in temperature. Decreases May increase or decrease; depends on the gas Increases Remains unchanged Decreases May increase or decrease; depends on the gas Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
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