True or False: The primary cause of over-pressurization of refrigeration cylinders is due to overheating.

The statement that the primary cause of over-pressurization of refrigeration cylinders is due to overheating is accurate. In refrigeration systems, cylinders can experience increased pressure when temperatures rise. This is because gases expand when heated, leading to a buildup of pressure inside the container.

If a refrigeration cylinder overheats, the temperature increase can cause the refrigerant gas to expand to the point where the pressure exceeds the cylinder's design limits. This condition can lead to ruptures, leaks, or other hazardous situations.

Understanding this principle is crucial for technicians, as it underlines the importance of monitoring temperatures and ensuring that refrigeration systems operate within safe parameters to prevent dangerous over-pressurization events. Additionally, while other factors like excessive charging or mechanical failure can lead to over-pressurization, overheating remains the most direct and primary cause in many cases.