Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Decreases Increases May increase or decrease ; depends on the material Remains constant Decreases Increases May increase or decrease ; depends on the material Remains constant ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of a multiple effect evaporator depends upon the Neither A nor B Heat balance consideration Both A and B Rate of heat transfer Neither A nor B Heat balance consideration Both A and B Rate of heat transfer ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not concerned with the heat transfer? Peclet number Schmidt number Brinkman number Stanton number Peclet number Schmidt number Brinkman number Stanton number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The advantage of backward feed multiple effect evaporators over forward feed units is that Most concentrated liquid is at highest temperature There is no additional cost of pumping Equal heat transfer co-efficients exist in various effects Heat sensitive material can be handled Most concentrated liquid is at highest temperature There is no additional cost of pumping Equal heat transfer co-efficients exist in various effects Heat sensitive material can be handled ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by Εx + εy (εx + εy)/(εx + εy - εx . εy) 1/εx + 1/εy Εx . εy Εx + εy (εx + εy)/(εx + εy - εx . εy) 1/εx + 1/εy Εx . εy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not used as a medium for high temperature heating ? mercury liquid metal None of the listed here dowtherm mercury liquid metal None of the listed here dowtherm ANSWER DOWNLOAD EXAMIANS APP
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