1. Of the following copper tubing types, the one with the thinnest wall is _____.

2. Which type of copper tubing has the same dimensions as Type ACR?

3. Hard-drawn copper tubing is harder than soft tubing because _____.

4. The final choice of piping material for many applications, including fuel gases, is often controlled by _____.

5. What is the face angle of flares used in the HVAC trade?

6. Swaging is a method of creating a _____.

7. The primary advantage of mechanical fittings over heat-bonded joints is that they _____.

8. A copper tube should not be deburred after cutting when _____.

9. A saw blade that is too coarse for cutting tubing _____.

10. Prior to leak testing, and after the fitting is finger-tight, compression fitting nuts should be initially tightened _____.

11. Once the ferrule has been installed on a copper tube, it _____.

12. The type of support that can be used to hang tubing from above or support it from below or even
horizontally is called a _____.

13. The type of plastic pipe that is primarily connected with clamps is _____.

14. Which type of material below has the same outside diameter and wall thickness as the same nominal size and schedule of steel pipe?

15. Which product often has a colorant added to provide evidence that the product was applied?