HVAC Journeyman Practice Exam

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What is the correct construction material for nonabrasive industrial product-conveying ducts?

Aluminum
Fiberglass
Sheet metal
All of the above

The correct answer is: Sheet metal

The correct construction material for nonabrasive industrial product-conveying ducts is sheet metal. This choice is favored due to its robustness, ability to withstand various conditions, and ease of fabrication and installation. Sheet metal ducts are commonly used because they can be manufactured to precise dimensions, are lightweight compared to other materials, and offer excellent resistance to damage. In contrast, while aluminum and fiberglass can be suitable for certain applications, they may not always be the first choice for nonabrasive product conveying. Aluminum, while lightweight and resistant to corrosion, might not have the same structural integrity as sheet metal in certain environments. Fiberglass, on the other hand, may be used in applications requiring lightweight and corrosion-resistant materials but is generally more expensive and less widely applied in the context of industrial conveying ducts compared to sheet metal. Therefore, sheet metal emerges as the most appropriate material for this specific use case.