Alabama Contractors License Practice Exam

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Study for the Alabama Contractors License Test. Prepare with quizzes featuring flashcards and multiple-choice questions, each supported by hints and explanations. Equip yourself for exam success!

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Which type of piping is considered nonmetallic and is listed for use in residential dwelling sprinklers?

PVC
CPVC
Steel
Copper

The correct answer is: CPVC

CPVC, or Chlorinated Polyvinyl Chloride, is considered a nonmetallic piping material widely recognized for its use in residential sprinkler systems. This type of piping is favored for its ability to withstand high temperatures and its resistance to corrosion, which makes it suitable for the water flow required in fire suppression systems. In residential sprinkler systems, the material must be both durable and capable of handling the pressures and temperatures associated with such applications. CPVC is specifically designed and approved for this use, often being lighter and easier to install compared to metal options. While PVC is another nonmetallic piping option, it is typically not approved for hot water applications, which limits its use in sprinkler systems. Steel and copper, on the other hand, are metallic options that, although robust, are not categorized as nonmetallic and may also have weight and installation considerations that are less favorable in residential settings.