Gas Fitter Practice Test

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Study for the Gas Fitter Test. Enhance your knowledge with flashcards and multiple-choice questions, each accompanied by hints and explanations. Ace your exam!

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

Low gas supply pressure
Faulty thermocouple
Improper air mixture
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.