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 considered a proper installation depth for non-metallic buried gas lines?

12 inches minimum
18 inches minimum
24 inches minimum
36 inches minimum

The correct answer is: 18 inches minimum

The proper installation depth for non-metallic buried gas lines is recognized as a minimum of 18 inches. This depth is established to enhance safety and protect the lines from potential damage caused by surface activities, such as excavation or landscaping, as well as from environmental factors. Installing gas lines at this depth helps mitigate the risk of accidental strikes during future digging operations, which can be particularly dangerous given the nature of gas lines. Choosing 18 inches as the minimum depth also aligns with industry standards and codes that are put in place to ensure the reliability and safety of gas distribution systems. It balances practical installation considerations with sufficient protection for the non-metallic materials, which may be more vulnerable to damage when installed too close to the surface.