Is it true that an internal inspection of a tower requires removing each manway inspection tray at every tray level?

The correct answer signifies that performing an internal inspection of a tower indeed necessitates the removal of each manway inspection tray at every tray level. This procedure is crucial for ensuring a comprehensive assessment of the internal structure and components of the tower. Each tray level may possess different characteristics, conditions, or potential issues, and accessing each one allows for a thorough visual inspection and maintenance checks.

By inspecting all tray levels, technicians can identify any wear, corrosion, blockage, or other concerns that may not be evident if only some levels are examined. This ensures that not only is the condition of the overall tower assessed, but also any specific issues affecting individual trays are properly addressed. This careful approach helps maintain the integrity and efficiency of the tower operations, ultimately contributing to safety and reliability in its function.

The other options would suggest either partial inspections or specific levels where inspection could happen, which would be insufficient for maintaining the overall safety and efficiency of the tower system.