Gas Heat ESCO Practice Exam

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What instrument is used for calculating carbon dioxide levels in flue gas?

  1. Combustion analyzer

  2. Manometer

  3. Thermocouple

  4. Oscilloscope

The correct answer is: Combustion analyzer

A combustion analyzer is designed specifically to measure the level of carbon dioxide in flue gas. Manometers are used to measure pressure, thermocouples are used to measure temperature, and oscilloscopes are used to measure electrical signals. While these instruments may be used in conjunction with a combustion analyzer, they are not designed to directly measure carbon dioxide levels in flue gas. Therefore, they are incorrect choices for this question.

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