Examples of heat exchangers? - Heat Transfer

Q.  Which of the following is/are example/s of heat exchanger?
- Published on 12 Aug 15

a. Feed water heater in which a stream of steam is directly mixed with cold water and the mixture leaves at uniform temperature
b. Feed water heater in which a stream of steam and cold water are not mixed and separated by partition through which heat flows
c. both a. and b.
d. none of the above

ANSWER: both a. and b.

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