Recreational Vehicle (RV) Technician Practice Test

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What information is not found on the protective collar of a DOT cylinder?

  1. Propane capacity in pounds

  2. Manufacturer's name

  3. DOT specifications

  4. Inspection date

The correct answer is: Propane capacity in pounds

The protective collar of a DOT cylinder is designed to safeguard the cylinder and its valve, providing important regulatory and safety information. While it includes details about the manufacturer’s name, the specifications set by the Department of Transportation (DOT), and the inspection date, it typically does not state the propane capacity in pounds. This information is generally found on the main label of the cylinder rather than on the protective collar, which serves mainly to protect the valve and provide critical regulatory details. The absence of propane capacity on the collar makes it a key feature of its design, emphasizing safety and compliance over storage capacity details.