Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Liquids Gases Both solids & liquids Solids Liquids Gases Both solids & liquids Solids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Grashoff number, which is defined as g . β(Ts - T∞) ρ². L³/μ², is proportional to the ratio of buoyancy force to __________ force. Elastic Inertial Viscous None of these Elastic Inertial Viscous None of these 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 has maximum thermal conductivity? Nitrogen Iron Coal Tar Nitrogen Iron Coal Tar ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a cooling tower, water becomes cool by Vaporisation due to heat loss to air Loosing sensible heat Loosing latent heat Heat transfer to surroundings Vaporisation due to heat loss to air Loosing sensible heat Loosing latent heat Heat transfer to surroundings ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the None of these Solution has an elevation of boiling point Evaporators operate under vacuum Evaporators opreate at atmospheric pressure None of these Solution has an elevation of boiling point Evaporators operate under vacuum Evaporators opreate at atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
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