Which of the following is NOT a factor that must be known before locking or tagging out machinery?

Understanding the factors that must be known before locking or tagging out machinery is crucial for ensuring safety during maintenance or repair work. The correct response indicates that the time of day is not a critical factor in the lockout/tagout process.

When performing lockout/tagout, it is essential to identify the type of energy present in the machinery—whether it be electrical, mechanical, hydraulic, etc., since this information aids in determining the appropriate safety measures to take. Additionally, knowing the amount of energy present helps in assessing the potential risks associated with that energy. Understanding the specific hazards linked to the energy involved ensures that workers can implement the necessary precautions to protect themselves and others from harm.

While the time of day may influence certain operational aspects or scheduling of work, it does not directly impact the safety measures or the lockout/tagout procedures themselves. Therefore, it is not a fundamental factor that needs to be accounted for prior to locking or tagging out machinery. This clarity on essential safety criteria reinforces the importance of diligent safety practices in the workplace.