What is a required characteristic of the test panel for pneumatic gunning?

The required characteristic of the test panel for pneumatic gunning is that the anchors must be similar to the actual installation job. This is crucial because the test panel serves as a practice and evaluation tool, helping to assess how well the material will adhere to the mechanics of the project in a real-world scenario. By ensuring that the anchors on the test panel mimic those used in the actual application, it provides valuable insights into the bonding strength and overall effectiveness of the gunning process under conditions that closely reflect those that will be encountered during the installation. This alignment helps in achieving consistent quality and performance when installing refractory materials in the field.