Heat Transfer In thermal radiation for a black body (where, ε is emissivity and α is absorptivity) α ≠ 1, ε = 1 α ≠ 1, ε ≠ 1 α = 1; ε = 1 α = 1; ε ≠ 1 α ≠ 1, ε = 1 α ≠ 1, ε ≠ 1 α = 1; ε = 1 α = 1; ε ≠ 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchangers operating, when the asymptotic range is reached, None of these Results in making part of the heating surface inactive Provide very large heat transfer co-efficient Results in abruptly increased velocity None of these Results in making part of the heating surface inactive Provide very large heat transfer co-efficient Results in abruptly increased velocity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) 2K/h0 K/h0 h0/K h0/2K 2K/h0 K/h0 h0/K h0/2K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not concerned with the heat transfer? Stanton number Schmidt number Peclet number Brinkman number Stanton number Schmidt number Peclet number Brinkman number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat waves Travel in straight line Both B and C Can be reflected by a mirror Can not pass through vacuum Travel in straight line Both B and C Can be reflected by a mirror Can not pass through vacuum ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The absorptivity of a body is equal to its emissivity for circular bodies none of the listed here at a particular temperature under thermal equilibrium for circular bodies none of the listed here at a particular temperature under thermal equilibrium ANSWER DOWNLOAD EXAMIANS APP
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