Gas Heat ESCO Practice Exam

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A spark igniter used in gas furnaces typically operates at what voltage?

  1. 10,000 and higher

  2. 12,000 only

  3. 120

  4. 250

The correct answer is: 10,000 and higher

A spark igniter used in gas furnaces typically operates at a high voltage of 10,000 and higher. This high voltage is necessary to create a spark with enough energy to ignite the gas-air mixture in the combustion chamber. Options B, C, and D suggest voltages that are too low to effectively ignite the gas, making them incorrect.

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