What is the maximum ambient temperature in which a valid J1667 opacity test can be undertaken?

A. 0 degrees Fahrenheit (-17 degrees Celsius)
B. 32 degrees Fahrenheit (0 degrees Celsius)
C. 60 degrees Fahrenheit (15 degrees Celsius)
D. 86 degrees Fahrenheit (30 degrees Celsius)


Answer: D

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Fill in the blank(s) with the appropriate word(s).

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What will be an ideal response?

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