Is 17 working hours in 24 hours an excessive long workday around dangerous machinery with only 7 hours off time per day?

Yes, 17 working hours in a 24-hour period is excessive, especially when operating dangerous machinery. This schedule leaves only 7 hours for rest, which may not be sufficient for recovery, increasing the risk of fatigue-related accidents and impairing performance. Adequate rest is crucial for maintaining safety and health in high-risk environments.