Recreational Vehicle (RV) Technician Practice Test

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Where can the length of a DOT cylinder vent stem be found?

  1. On the body of the cylinder

  2. On the valve guard

  3. At the base of the cylinder

  4. On the cap

The correct answer is: On the valve guard

The length of a DOT cylinder vent stem is typically found on the valve guard. The valve guard often includes essential information and markings related to the cylinder's specifications, including safety features and vent details. This is important for ensuring that technicians can verify that the cylinder meets safety regulations and operational standards. The valve guard serves as a protective element for the valve, and including pertinent identification or measurements there facilitates easier access to critical information needed for maintenance or inspections. While the other options may seem relevant, they do not usually provide the specific information regarding the length of the vent stem. The body of the cylinder primarily contains identification markings, while the base and cap do not generally feature the detailed specifications required for vent stem measurements.