The rate of radiant energy, which is emitted by a surface at any temperature and in small wavelength is found from the known rate of energy, which under the same condition would be emitted from a black surface by multiplying with the absorptivity. Above enunciation is known as
A) Planck's law
B) Kirchhoff's law
C) Stefan Boltzman law
D) Lambert rule
E) None of the above
Correct Answer:
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Q31: Steam traps are used to
A)Heat steam
B)Remove condensate
C)Balance
Q32: -40°C is equivalent to
A)- 40°K
B)172°R
C)- 40°F
D)273°K
E)500°R
Q33: The temperature inside a furnace is generally
Q34: At all wavelengths and temperatures the monochromatic
Q35: If the bubbles formed on a submerged
Q37: A radiation shield should have
A)low reflectivity
B)high reflectivity
C)high
Q38: In heat exchanger design, one transfer unit
Q39: A 1-2 heat exchanger means
A)Single pass on
Q40: When a body is in thermal equilibrium
Q41: The process of separation of solutes of
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