Final answer:
Cylinders and their appurtenances must be determined to be safe before being loaded into vehicles.
Step-by-step explanation:
Cylinders and their appurtenances must be determined to be safe before being loaded into vehicles. This is important to ensure that the cylinders are not damaged or compromised in any way that could pose a risk during transportation.
For example, in the context of propane cylinders, the valves and seals must be checked for any leaks or improper functioning. Additionally, the cylinders should be inspected for any visible signs of damage or corrosion.
By conducting these checks, it can be determined whether the cylinders are safe and suitable for transportation.