MCC-NH Gas Fitters Practice Exam

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Which code covers the 1st and 2nd stage regulators on a liquid propane (LP) system?

NFPA54
NFPA58
NFPA70
NFPA72

The correct answer is: NFPA58

The most appropriate code covering the first and second stage regulators in a liquid propane (LP) system is NFPA 58. This standard specifically addresses the storage and handling of liquefied petroleum gases, which includes regulations for components such as regulators that are crucial for the safe and efficient operation of LP systems. In the context of LP systems, the first stage regulator reduces the high pressure from the propane tank to a lower, more manageable level, while the second stage regulator further reduces the pressure to the level needed for appliances. NFPA 58 outlines the requirements for installation, operation, and maintenance of these regulators to ensure safety and compliance. Other codes listed serve different purposes; for instance, NFPA 54 focuses on the National Fuel Gas Code, addressing gas piping systems and appliances, while NFPA 70 deals with electrical wiring and safety, and NFPA 72 pertains to fire alarm systems. Therefore, NFPA 58 is specifically designed to address the nuances of LP gas systems and their components, making it the correct reference in this scenario.