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 fol-lowing?
a. O2-N2 mixture
b. O2-CO2 mixture
c. CO2
d. O2-He mixture
Question 2
During inspection of the shoulder of a compressed gas cylinder, you note a plus sign (+) next to the test date. This indicates what about the cylinder?
a. It is made of spun aluminum, not steel.
b. It only requires a 10-year DOT inspection.
c. It can be filled to 10 above its service pressure.
d. It has a high coefficient of elastic expan-sion.