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Heat Transfer

Heat Transfer
__________ equation relates the thermal conductivity of a solid to its temperature.

Kistyakowski
Kopp's
Antonie
Lee's

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Heat Transfer
A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number.

Condensation
Brinkman
Stantan
Grashoff

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Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

W/m.k²
None, A is just a number
W/m.k
W/m

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Heat Transfer
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)

K/Ax
X/KA
KA/x
A/Kx

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Heat Transfer
Choose the correct equation.

Nu = (Re) (Pr) (St)
Nu = (Re)(Pr)
Nu = (Re) (Pr) (Gz)
Nu = (Pr)(St)

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Heat Transfer
In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is

None of these
Linear
Parabolic
Hyperbolic

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