Which information should be recorded in a propane cylinder maintenance log?

• A. Cylinder ID/serial, hydrostatic test date
• B. Inspection results, leak-test results
• C. Any repairs or incidents
• D. Cylinder ID/serial, hydrostatic test date, inspection results, leak-test results, and any repairs or incidents

Answer: (D)

A maintenance log for propane cylinders should provide a complete history for each cylinder so it can be tracked and kept safe. The best answer includes the cylinder ID or serial number to identify the specific unit, the date of the hydrostatic test to verify the cylinder has undergone a valid pressure test, the inspection results to document the condition found during routine checks, the leak-test results to confirm there are no leaks, and any repairs or incidents to capture corrective actions or damage that could affect safety. This full set of information ensures you can verify compliance, plan next service, and quickly assess any safety concerns. Leaving out any of these elements creates gaps—without identification you can't tell which cylinder is referenced; without the hydrostatic date you can't prove it's within its test interval; without inspection or leak-test results you lack evidence of current condition; without records of repairs or incidents you might miss critical safety history.