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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 9
41.
Nusselt number is the ratio of the temperature gradient at the wall to
temperature difference
heat flux
that across the entire pipe
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The Stefan-Boltzman constant depends on the
medium
temperature
surface
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
The units of resistance to heat transfer is
J.m-2.K-1
J.m-1.K-1
W.m-2.K-1
W-1m2K
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Thermal conductivity of a gas at low density, __________ with increase in temperature.
decreases
increases
remains unchanged
may increase or decrease; depends on the gas
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.
Grashoff
Biot
Stantan
Reynolds
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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