Combustion Appliances Safety Test (CAST) Practice Test

Ambient CO is measured at 42 ppm during an inspection. Which response best matches ANSI/BPI-1200-S-2017?

Ignore the reading because it is below 70 ppm Advise the occupant of elevated CO, open windows and doors, and recommend turning off possible CO sources Immediately relight all standing pilots Close the building tighter to identify the source

Correct Answer:

Advise the occupant of elevated CO, open windows and doors, and recommend turning off possible CO sources

Explanation:

For ambient CO from 36 through 69 ppm, the standard calls for advising the occupant, opening windows and doors, and recommending that possible CO sources be turned off.

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