Factor of safety (i.e., overdesign factor) in heat transfer equipments is about _____________ percent more than the actual/theoretical design factor?
Correct answer: A. 15-20
- A. 15-20
- B. 5-10
- C. 30-35
- D. 35-40
Explanation
Heat-transfer equipment is commonly given an overdesign allowance of about 15–20% to cover fouling, uncertainty in coefficients, and operating variations. Thus, the practical design is larger than the theoretical requirement.
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