When should a plane test be performed?

A plane test is crucial for ensuring the safety and functionality of the equipment involved in various contexts, and the correct choice reflects the comprehensive approach necessary for effective safety management. Performing a plane test during initial setup ensures that the machinery or equipment is calibrated and functioning correctly from the start. However, it's equally vital to conduct these tests after any incident or accident, as such events may compromise the integrity of the equipment, leading to potentially dangerous malfunctions.

Additionally, routine checks are essential, as they help maintain the ongoing safety and reliability of the equipment over time. By confirming that it operates correctly at regular intervals, operators can identify and address issues before they lead to failures or unsafe situations. Given this context, recognizing that a plane test should be performed in various circumstances, including initial setup, post-incident evaluations, and during routine checks, makes it clear why the comprehensive option encompasses all the critical moments when testing is required for safety and operational integrity.