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HEAT TRANSFER

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

0°K
100°C
0°C
none of the listed here

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

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

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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

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

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Heat Transfer
_______ paint has the maximum absorption coefficient.

White
Yellow
Grey
Black

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Heat Transfer
Steam traps are provided in steam carrying pipelines to

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

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