IndiaBIX

Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 5
1.
The Grashoff number is defined as the ratio of the
buoyancy to inertial forces.
buoyancy to viscous forces.
inertial to viscous forces.
buoyancy to surface tension forces.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
According to Reynolds analogy, Stanton number is equal to (where, f = Fanning friction factor)
2f
f
f/2
f/4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The absorptivity of a body is equal to its emissivity
at a particular temperature.
for circular bodies.
under thermal equilibrium.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Absorptivity and refletivity of a perfect black body are respectively
1 and 0
0 and 1
1 and ∞
0 and 0.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)
α = 1; ε ≠ 1
α ≠ 1, ε = 1
α ≠ 1, ε ≠ 1
α = 1; ε = 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers