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 the explosion limits for propane gas?

2.4 to 9.5%
1.9 to 8.5%
4 to 15%
5 to 10%

The correct answer is: 2.4 to 9.5%

Propane gas, a common fuel used for heating and cooking, has specific explosion limits that are critical for ensuring safety in installations and applications. The lower explosion limit (LEL) and upper explosion limit (UEL) define the concentration range within which propane can form an explosive mixture with air. The correct range for propane gas is 2.4% to 9.5% by volume in air. This means that if the concentration of propane in the air falls below 2.4%, it is too lean to ignite, and if it exceeds 9.5%, it is too rich for combustion. Operating within this range is essential for preventing hazardous situations. Understanding these limits is vital for gas fitters when designing systems and ensuring they meet safety regulations. Knowledge of the explosion limits helps in properly ventilating spaces and determining safe working conditions, reducing the risks associated with gas leaks or accumulation.