Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is between 0 and 1 >1 1 0 between 0 and 1 >1 1 0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam is routed through the tube in case of a __________ evaporator. Short tube vertical Long tube vertical Horizontal tube Basket type Short tube vertical Long tube vertical Horizontal tube Basket type ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Radiator of an automobile engine is a __________ type of heat exchanger. Counter-current Direct contact Co-current Cross-current Counter-current Direct contact Co-current Cross-current ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Water Transformer oil Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) Water Transformer oil Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law. Logarithmic Parabolic Hyperbolic Linear Logarithmic Parabolic Hyperbolic Linear ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m².°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Less than that of the uninsulated steam pipe Equal to that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Less than that of the uninsulated steam pipe Equal to that of the uninsulated steam pipe ANSWER DOWNLOAD EXAMIANS APP
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