E-PolyLearning

1. Some examples of heat exchanger are

(i) Condensers and evaporators in refrigeration units
(ii) Evaporator of an ice plant and milk chiller of a pasteurizing plant
(iii) Automobile radiators and oil coolers of heat engines

Identify the correct answer
a. 1 only
b. 2 and 3
c. 1, 2 and 3
d. 1 and 2
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Answer: (c).1, 2 and 3

2. Heat exchangers are classified into how many categories?
a. 1
b. 2
c. 3
d. 4
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Answer: (d).4

3. Based upon the nature of heat exchange process, the heat exchangers are classified into how many categories
a. 1
b. 2
c. 3
d. 4
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Answer: (c).3

4. The energy transfer between the hot fluid and cold fluids is brought about by their complete physical mixing in
a. Direct contact heat exchanger
b. Regenerators
c. Recuperators
d. Boilers
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Answer: (a).Direct contact heat exchanger

5. Which of the following is not an example of recuperators type heat exchanger?
a. Automobile radiators
b. Condensers
c. Chemical factories
d. Oil heaters for an aero plane
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Answer: (c).Chemical factories

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