CSLB Class B General Contractor's License Practice Exam

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Prepare for the CSLB Class B General Contractor's License Test with interactive flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding and readiness for the exam.

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What is the purpose of PVC primer?

To glue PVC pipes to other materials
To soften PVC pipe before applying PVC cement
To prevent electrical shock
To help solder conduit or piping

The correct answer is: To soften PVC pipe before applying PVC cement

The purpose of PVC primer is to soften PVC pipe before applying PVC cement. When PVC pipe and fittings are joined together using cement, the primer acts as a preparatory agent that cleans and softens the surface of the PVC material. This process ensures a better bond between the pipe and the fittings when the cement is applied. The chemical action of the primer temporarily softens the PVC, creating a more receptive surface for the cement. This results in a strong and durable joint that is essential for maintaining the integrity of the plumbing or drainage system. Proper use of primer is typically specified in plumbing codes and considered best practice in plumbing installation. Understanding the function of PVC primer is crucial for anyone involved in plumbing or construction, as it directly impacts the effectiveness and reliability of the connections made during installation.