Question 34

Purple primer followed by a cement is applied.

When using a solvent cement to join PVC pipe and fittings, it is true that a purple primer is commonly applied before the cement. This primer prepares the surface and ensures a stronger bond.

A) Only glue cement is applied

This statement is incorrect because using only glue cement without a primer does not provide the proper preparation needed for a strong joint. Primers are essential in the solvent cementing process.

B) Clear primer followed by a clear cement is applied

While clear primer and cement can be used, this statement does not reflect the typical practice in PVC applications where purple primer is specifically indicated for identification and effectiveness.

C) Purple primer followed by a cement

This statement is correct as it accurately describes the standard procedure in joining PVC pipes. The purple primer not only helps to clean the surface but also enhances the bond created by the cement.

D) Not purple in color

This option is misleading as it contradicts the accepted practice of using purple primer, which is specifically designed for PVC applications and is an identifiable aspect of the solvent cement process.

E) is applied

This statement is incomplete and does not provide specific information about what is being applied. Therefore, it does not contribute to understanding the correct procedure for joining PVC pipes.

F) Clear cleaner followed by a clear cement is applied

This statement is also incorrect in the context of PVC joining. While clear cleaners and cements may be used, they do not include the essential step of using a purple primer, which is a standard in PVC applications.

Conclusion

In summary, the correct answer, C, emphasizes the importance of using purple primer prior to applying cement when joining PVC pipes. The other options fail to represent standard practices or provide incomplete information regarding the solvent cementing process. Thus, C stands out as the only accurate description of the procedure.