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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 2
41.
A perfect black body is a perfect __________ of radiation.
absorber
emitter
both (a) & (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.
equal to
more than
less than
either more or less than (depending upon the fluid)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a
boiler
heat exchanger
recuperator
regenerator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Which of the following is directly concerned with the heat transfer ?
Strouhal number
Sherwood number
Euler number
Grashoff number
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Pick out the wrong statement:
With change in temperature, the radiant energy emitted by a black body remains unchanged.
Absorptivity of a body approaches unity in case of diffuse reflection.
Absorptivity of a perfectly black body is unity.
Value of Stefan-Boltzman constant is 4.876 x 10-8 KCal/m2.hr.°K4.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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