Which of the following is NOT a requirement for good mine track?

Good mine track is crucial for the safe and efficient operation of mining activities, and its requirements are centered around functionality and safety. The correct response indicates that painting the track a bright color is not a fundamental requirement for good mine track.

While proper size ensures the track can handle the loads and stresses during mining operations, being well tied and spiked ensures stability, allowing safe transport of materials. Proper cleanliness and drainage are vital to prevent the accumulation of water and debris, which can lead to unsafe conditions or damage to the track itself. These aspects are essential for maintaining operational integrity and safety.

In contrast, the color of the track does not affect its functionality, strength, or safety. Although a bright color might have some visibility advantages in certain contexts, it does not contribute to the actual structural or operational requirements of the track. Hence, while visibility can be valuable in many situations, it is not a necessity for good mine track.