Arc Flash Boundary (ARC) - is the distance at which an electrical arc can flash. outward, which may endanger employees working on electrical equipment. Flash Protection Boundary (FPB) - theJcalculated safe working distance from. electrical equipment which would not expose the employee to the hazards.
One advantage of freeze drying is that food preserved in this method can last longer than food preserved in virtually any other way. Freeze dried foods, if stored properly, can last for years, even decades, and taste exactly as they did the day they were bought fresh.
The advantages of dried and concentrated foods compared to other methods of. preservation are described in Chapters 6, 13 and 15. The heat used to dry foods or. concentrate liquids by boiling removes water and therefore preserves the food by a. reduction in water activity (Chapter 1).