Gas Fitter Practice Test

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Prepare for your gas fitter exam with a comprehensive quiz that includes flashcards, multiple choice questions, insights, and detailed explanations. Boost your chances of success and ensure you're exam-ready!

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What is a common reason for a water heater pilot light going out?

  1. Low gas supply pressure

  2. Faulty thermocouple

  3. Improper air mixture

  4. High humidity levels

The correct answer is: Low gas supply pressure

A common reason for a water heater pilot light going out is low gas supply pressure. When the gas pressure is insufficient, it may not be able to maintain a consistent flame in the pilot light. This can happen due to issues with the gas supply line, a malfunctioning gas regulator, or a partially closed valve. Without the right pressure, the gas can’t flow properly, leading to a weak flame or extinguishing the pilot light completely. While other factors may contribute to pilot light issues, low gas supply pressure is a primary cause because gas appliances are designed to operate within specific pressure ranges for optimal performance. If the pressure drops too low, it directly impacts the ability of the pilot light to stay lit.

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