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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 4
16.
In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head.
twice
four times
square root of
square of
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would
decrease
increase
first decrease and then increase
first increase and then decrease
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is
minimum
maximum
zero
infinity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
For what value of Prandtl number, the Col-burn analogy is valid ?
0.06 to 120
0.6 to 120
1 to 103
l to 50
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
In a forward feed multiple effect, the pressure build up will be
least at the inlet of the first effect.
least at the outlet of the last effect.
highest at the inlet of the last effect.
highest at the outlet of the last effect.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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