Which of the following lengths of heat exchanger tubes are normally not used in practice ?
Correct answer: C. 10 metres
- A. 2.5 metres
- B. 6 metres
- C. 10 metres
- D. 0.5 metre
Explanation
Heat-exchanger tubes are commonly manufactured in practical lengths such as 2.5 and 6 m, while 10 m tubes are generally too long for usual exchanger construction and maintenance. Therefore, 10 metres is the normally unused length.
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