Gas Fitter Practice Test

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Which gas has the lowest ignition temperature according to the provided answers?

  1. Natural gas

  2. Propane

  3. Butane

  4. Ethylene

The correct answer is: Natural gas

Natural gas has the lowest ignition temperature among the options listed. The ignition temperature is the minimum temperature required to ignite a gas without an external flame or spark. Natural gas, primarily composed of methane, has an ignition temperature around 540°C (1004°F), making it more readily ignitable compared to propane, butane, and ethylene, which have higher ignition temperatures. Understanding ignition temperatures is crucial in gas fitting and safety protocols, as it helps determine how easily and under what conditions a gas may ignite. This knowledge is vital for ensuring safe handling, storage, and use of various gaseous fuels in different applications. Ethylene, for instance, while having applications in chemical processes, ignites at a higher temperature, requiring different safety considerations compared to natural gas.

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