What materials are used for fuel gas piping?

What will be an ideal response?


Black iron is used for piping natural gas. Copper is commonly used for LP gas lines, but it should not be used with natural gas because the odorant added to natural gas reacts with copper.

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The water line supplying a swimming pool requires the installation of a(n) _____.

a. pressure-type vacuum breaker b. double-check valve assembly c. atmospheric vacuum breaker d. dual-check valve backflow preventer

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Before using a voltage tester, check to make sure it is functioning correctly by _____.

a. touching the leads together b. connecting it to a known energized source c. grounding the leads d. checking it with a multimeter

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What method of pruning allows more light to reach inner branches?

A) Thinning B) Heading back C) Renewal pruning D) Root pruning

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Nonmetallic sheathed (NM) cable is suitable for use in

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