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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Which material is commonly used in plumbing venting systems?

Copper
PVC
Wrought iron
Kale wool

The correct answer is: PVC

In plumbing venting systems, PVC (polyvinyl chloride) is commonly used due to its favorable properties, including lightweight, corrosion resistance, affordability, and ease of installation. PVC is non-toxic and can be used for various applications, including venting waste gases from plumbing fixtures to the outdoors. Its smooth interior surface helps maintain consistent airflow and reduces the potential for clogs. Copper is often used in plumbing for supply lines due to its durability and ability to resist corrosion, but it is less common in venting systems. Wrought iron is a traditional choice for drainage and venting, but it has largely been replaced by modern materials like PVC in residential plumbing due to the latter’s advantages. Kale wool does not relate to plumbing systems and is more commonly associated with insulation materials, making it irrelevant in this context. Therefore, PVC stands out as the most suitable choice for plumbing ventilation needs.