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M11Q1.State the difference between Breaking load and Tenacity. Also define RKM
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.

M11Q2.Briefly write about difference between CRE & CRL?
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.

M11Q3.The breaking load of a 20 Tex cotton yarn is 400 gram. Find its breaking length.
Answer: Breaking length = (400 * 1000) / (20 * 1000) = 20 km

M11Q4.If specimen length is increase in CRE means the breaking load will get decrease, why?
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.

M11Q5.With neat sketch briefly explain about Stelometer? Explain how the CRL is maintained in this instrument?
Answer: Refer: Tensile Testing ---> Principle of Tensile Testing ---> (b) Stelometer

M11Q6.Briefly explain about Test principle using in Instron Tensile Tester.
Answer: Refer: Tensile Testing ---> Principle of Tensile testing ---> g) Strain Gauge principle

M11Q7. Why Grab Tensile strength is more than Strip Tensile strength (fabric tensile testing)?
Answer: In this Grab Tensile test, there is a certain amount of assistance from yarns adjacent to the central stressed area so that the strength measured is higher than frayed strip test.


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