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.
Weight Reduction. All fresh foods contain water, which is its main source of weight (fruits are more than 80 to 90% water). However, during drying about 98% of the moisture in the food substance is removed, which reduces the weight by as much as 90%, making it lighter to carry backpacking. Aside from freeze-dryingâs use in backpacking and camping, the military also freeze-dries foods to make it easier for one person to carry large amounts.
1 Drying. 2  Drying is an ancient technique of food preservation and works well for many food types. 3  It is an inexpensive method of food preservation, as you rely on the sun or an oven. 4  Dried foods are compact and easily stored or carried. Some of these losses can be mitigated by not drying the food too long. 2  Salting: Salt is another ancient method of preservation. 3  Salt can be used as part of the drying process. 4  Salt increases the storage time of some foods such as fish and it enhances the flavour of dried foodstuffs.