- Graphite powder
- Thoria
- Zircon powder
- Beryllium
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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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In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)?
Answer: Option 4 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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Rate of heat release in a furnace, which is the measure of heat intensity is defined as?
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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Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?
Answer: Option 1 Let'
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Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.?
Answer: Option 1 Let'
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An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
Answer: Option 3 Let'
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Heat gain through insolation and heat loss through terrestrial radiation are equal approximately at which latitude?
Answer: Option 2 At 40° North and South the heat gain through insolation approximately equal to the heat loss through terrestrial radiation.
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