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Heat Transfer

Heat Transfer
(NRe.NPr)(D/L) is called the __________ number

Stanton
None of these
Graetz
Peclet

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Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.

Logarithmic
Linear
Hyperbolic
Parabolic

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Heat Transfer
Nucleate boiling is promoted

In the absence of agitation
On rough surfaces
None of these
On polished surfaces

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Heat Transfer
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

2K/h0
2hi/K
hi/K
K/h0

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

Lee's
Antonie
Kistyakowski
Kopp's

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Heat Transfer
In a boiling curve, the peak heat flux is called the __________ point.

Nusselt
Burnout
Boiling
Leidenfrost

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