Heat Transfer A black body does not __________ radiation. Reflect Refract Absorb or emit Both B & C Reflect Refract Absorb or emit Both B & C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the absorptivity of a black body? 1 0.95 0.78 1 0.95 0.78 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are (COP)R = 2.5; (COP)HP = 1.5 (COP)R = 1.5; (COP)HP = 2.5 (COP)R = (COP)HP = 0.6 (COP)R = (COP)HP = 2.5 (COP)R = 2.5; (COP)HP = 1.5 (COP)R = 1.5; (COP)HP = 2.5 (COP)R = (COP)HP = 0.6 (COP)R = (COP)HP = 2.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is 88.66 Dependent on NRe only 3.66 1.66 88.66 Dependent on NRe only 3.66 1.66 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of an evaporator is influenced by the Number of effect Steam pressure Feed temperature Both B & C Number of effect Steam pressure Feed temperature Both B & C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Temperature gradient Heat transfer co-efficient Heat transfer area Mechanical strength of the equipment Temperature gradient Heat transfer co-efficient Heat transfer area Mechanical strength of the equipment ANSWER DOWNLOAD EXAMIANS APP
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