Gas Heat ESCO Practice Exam

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Gas flow to a natural gas furnace can be checked:

  1. by observing the color of the flame

  2. using the gas meter installed at the site (clocking the meter)

  3. by measuring the temperature of the exhaust gases

  4. using a smoke detector

The correct answer is: using the gas meter installed at the site (clocking the meter)

The correct answer is using the gas meter installed at the site (clocking the meter). Clocking the gas meter is a common method used to check the gas flow to a natural gas furnace. By observing the rate at which the gas meter is moving, technicians can ensure that the correct amount of gas is being supplied to the furnace for efficient and safe operation. The other options are not accurate for checking the gas flow to a natural gas furnace: - Observing the color of the flame can provide information about the efficiency of combustion but not necessarily about the gas flow. - Measuring the temperature of the exhaust gases is more related to combustion efficiency and not a direct method for checking gas flow. - Using a smoke detector is used to detect smoke or combustion byproducts, not specifically for checking gas flow.

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