Chemical Engineering - Heat Transfer

46.
'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a
non-dimensional factor.
factor of safety.
conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to
d0.8
d-0.2
d-1
d-1.8
Answer: Option
Explanation:
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48.
Prandtl and Reynolds analogy are same, when Prandtl number is
0.5
1
> 2
1.5
Answer: Option
Explanation:
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49.
Heat transfer occurs by natural convection because change in temperature causes difference in
viscosity
density
thermal conductivity
heat capacity
Answer: Option
Explanation:
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50.
The ratio of kinematic viscosity to thermal diffusivity is called the __________ number.
Peclet
Prandtl
Stanton
Nusselt
Answer: Option
Explanation:
No answer description is available. Let's discuss.