A Cylinder Has "DOT 3AL 2015" Stamped on It

question 36

Multiple Choice

A cylinder has "DOT 3AL 2015" stamped on it.What does the 3AL stand for?

• A) Manufacturer's initials
• B) Constructed of heat-treated, high-strength steel
• C) Required to undergo hydrostatic testing every 3 years
• D) Constructed of specially prescribed seamless aluminum alloys

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