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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 2
46.
Planck's distribution law is valid for __________ bodies.
black
white
coloured
all (a), (b) & (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
For hot feed, forward feeding as compared to backward feeding results in __________ economy.
increased
decreased
no effect on
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Radiation energy is emitted by all the substances, which are above
0°K
0°C
100°C
room temperature
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by
εx + εy
εx . εy
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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