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HEAT TRANSFER

Heat Transfer
Radiation energy is emitted by all the substances, which are above

none of the listed here
100°C
0°K
0°C

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Heat Transfer
The critical radius 'r' of insulation on a pipe is given by

r = 2k/h
r = k/2h
r = k/h
r = h/k

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Heat Transfer
As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the

temperature of the body only
none of the listed here
wavelength of monochromatic radiation
nature of material of body

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Heat Transfer
_______ paint has the maximum absorption coefficient.

Grey
White
Yellow
Black

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Heat Transfer
Steam traps are provided in steam carrying pipelines to

remove condensate and inert gases
release excess steam pressure by bleeding steam.
none of the listed here
condense steam

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