- Mass diffusivity to momentum diffusivity
- Thermal diffusivity to mass diffusivity
- Momentum diffusivity to thermal diffusivity
- None of these
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When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is?
Answer: Option 3 Let'
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Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)?
Answer: Option 1 Fourier's law of heat conduction is k. A. (dT/dx) where Q = Amount of heat flow through the body in unit time, A = Surface area of heat...
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Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)?
Answer: Option 2 Let'
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According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)?
Answer: Option 1 Let'
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In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)?
Answer: Option 1 Let'
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Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium.?
Answer: Option 2 Radiation is the process of heat transfer in which heat flows from a Hot body to cold body in a straight line, without affecting the intervening medium.
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Which of the following is concerned with both heat and mass transfer?
Answer: Option 1 Let'
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Controlling heat transfer film co-efficient is the one, which offers __________ resistance to heat transfer.?
Answer: Option 3 Let'
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In which mode of heat transfer, the Biot number is important?
Answer: Option 1 Let'
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Which of the following plays an important role in problems of simultaneous heat and mass transfer?
Answer: Option 1 Let'
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