Answer: Breaking load means the load at which the specimen breaks, usually expressed in grams weight or pounds weight. But Tenacity (specific strength) of material is the mass stress at break; the unit is gram/tex or gram/denier. Dividing the breaking load by denier or tex of the fiber we will get tenacity value. RKM means breaking resistance in Kilometer i.e. the length of the specimen which will just break under its own weight when hung vertically.
Answer: 1. CRE: Rate of increase of specimen length is uniform with time (the load measuring mechanism moves a negligible distance). 2. CRL: Rate of increase of the load is uniform with time and rate of extension is dependent on the load-elongation characteristics of the specimen.
Answer: If the length of test specimen increases, means the pobability of weak links are more than compared to short length of specimen, so the breaking load will get decrease when increasing the specimen length.