Heat and Mass Transfer The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit Area Thickness Temperature Time Area Thickness Temperature Time ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat) S.H/(S.H + L.H) S.H/(L.H - S.H) (S.H + L.H) /S.H (L.H - S.H)/S.H S.H/(S.H + L.H) S.H/(L.H - S.H) (S.H + L.H) /S.H (L.H - S.H)/S.H ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following has maximum value of thermal conductivity? Steel Aluminium Copper Brass Steel Aluminium Copper Brass ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h₁, h₂ and h₃ respectively. The average heat transfer coefficient for the cube is (h₁.h₂.h₃)1/3 1/h₁ + 1/h₂ + 1/h₃ None of these h₁ + h₂ + h₃ (h₁.h₂.h₃)1/3 1/h₁ + 1/h₂ + 1/h₃ None of these h₁ + h₂ + h₃ ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by Hr (time) Sq. m (area) K.cal (heat) °C (temperature) Hr (time) Sq. m (area) K.cal (heat) °C (temperature) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Planck's law Wien's law Kirchhoff's law Stefan's law Planck's law Wien's law Kirchhoff's law Stefan's law ANSWER DOWNLOAD EXAMIANS APP
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