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According to the National Institute of Standards and Technology of the U.S

Question 28

Multiple Choice

According to the National Institute of Standards and Technology of the U.S. Department of Commerce, a gas cylinder that is color-coded brown and green should contain which of the following?


A) O2-N2 mixture
B) O2-CO2 mixture
C) CO2
D) O2-He mixture

Correct Answer:

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