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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 11
26.
Pick out the wrong statement.
'Solvates' are chemical compounds formed by solute with their solvents. When water is the solvent, then it is called a 'hydrate'.
In heat exchanger calculations (Δt)weighted is used in place of Δt, when it involves more than one sequence of heating or cooling i.e., desuperheating & condensation or condensation & sub-cooling.
Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted.
In case of short tube vertical evaporators, area of central downtake is about 50 to 100% of the total tube cross-sectional area.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
What is the geometric mean of two heat transfer areas A1 and A2 ?
A1 . A2
A1 + A2
A1 . A2
2 A1 . A2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Evaporation by thermocompression results in the
saving of steam.
realisation of multiple effect economy in a single effect.
both (a) and (b).
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Forced circulation evaporators are normally used for concentrating liquids having
scaling characteristics
high viscosity
both(a) & (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Steam economy in case of a triple effect evaporator will be
1
< 1
> 1
between 0 and 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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