Which of the following items is typically recorded in a propane cylinder maintenance log?

• A. Cylinder ID/serial, hydrostatic test date
• B. Last service technician name
• C. Current gas price
• D. Hydrostatic test date, inspection results, leak-test results, and any repairs

Answer: (D)

Maintenance logs track safety checks and service actions, so they focus on what affects whether a cylinder is safe to use. The essential content to record is the hydrostatic test date, the results of that test, inspection results, leak-test results, and any repairs. Hydrostatic testing confirms the cylinder can safely hold pressure, inspections document the physical condition (for example, corrosion or damage), leak tests verify there are no leaks after testing or filling, and repairs capture what was done to fix any issues. Having all these details in one log provides a clear, traceable history for regulatory compliance and helps schedule the next required test. Recording only the cylinder’s ID or the last technician’s name doesn’t show test outcomes or repairs, and current gas price isn’t related to maintenance.