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.
Dehydration, or drying, is a simple, low-co~:way to preserve. food that might otherwise spoil. Drying removes water and -thus. prevents fermentation or the growth of molds. It also slows the. chemical changes that take place naturally in foods~ as when. fruit ripens. Surplus grain, vegetables, and fruIt pre$erved by. drying can be stored for future use. People have been drying food for thousands of years by placing. the food on mats in the sun. This simple method, however, allows. the food to be contaminated by dust, airborne molds and fungi, insects, rodents, and other animals.