50 Common Interview Question for Yarn Manufacturing Engineering/ Easy Interview Question and Answer

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Different Terms and Definition of Yarn Manufacturing:

In this article I will present, 50 common interview question for yarn manufacturing engineering. If you are a textile student or want to job in textile field, you have must to know these terms and definition.

  1. Fiber: Fiber is a material that consists of a fibrous structure and has a minimum length of, at the latest, 500 times its diameter.
  2. Textile Fiber: textile fiber is a class of natural or manufactured materials with some unique properties, i.e., spin ability or spun-able, high length-to-width ratio, sufficient strength, flexibility, dyeing ability, and cohesiveness, stiffness, ability to resist, good elongation properties
  3. Yarn: A product of substantial length and relatively small cross-section consisting of fibers or filaments with or without a twist is called yarn.
  4. Trash: Trash is the general term used for more significant impurities. The impurities whose cross-sectional size is bigger and ranges as ≥ 500 µm is defined as trash. The trash contains particles from the cotton plant and other plants that contaminate the cotton field.
  5. Dust: Dust is the general term for more minor size impurities and microscopic particles. The cross-sectional impurity size lies between 50-500 µm is defined as dust.
  6. Neps: Neps are small entanglements or knots of fibers. Neps do not grow on the plant. Seed cotton does not contain any neps. But when fibers go through the mechanical processes, then neps are generated.
  7. Bobbin: A cylindrical or slightly tapered former with or without a flange or flange for holding slubbings, roving or yarns.
  8. Elastic Limit: The limit up to which a substance shows the elastic property is called the elastic limit.
  9. Rd- Reflectance: This value expresses the whiteness of the light that is reflected by the cotton fibers and corresponds to the reflectance (Rd) represented in the Nickerson/Hunter color chart. It is used in conjunction with the yellowness (+b) to determine the color grade of the cotton.
  10. +b-Yellowness: This value expresses the yellowness of the light that is reflected by the cotton fibers. The yellowness (+b) of the sample is determined by using a yellow filter. It corresponds to the +b value represented in the Nickerson/Hunter color chart. The yellowness is used in conjunction with the reflectance (Rd) value to determine the instrument-measured color grade of the cotton.
  11. Elasticity: The properties of a substance by which it comes to its original position after withdrawing the applied load on it is called elasticity.
  12. Elastomer: Any polymer with high extensibility and rapid and substantially complete elastic recovery is called elastomer—for example, synthetic rubber, silicon rubber, natural rubber.
  13. Mixing: The mixture of some fibers from different grades or from the same origin are taken together for a product is called mixing.
  14. Blending: Different fibers from the same or different grades and different origins are taken together for a product is called blending. Blending is intended for the development of the physical properties of the end product.
  15. Elongation: The increase in length of a specimen during a tensile test, expressed in length units, is called elongation.
  16. Extension at Break: The extension percentage of a test specimen at the braking point is called extension at break or breaking extension.
  17. Feed Roller: A roller that forwards a yarn of subsequent processing or take-up stage is called a feed roller.
  18. Bale Management: Bale management is the management of the selection of tables from the fiber quality database and distribution of tables according to lay down management plan to achieve the target quality and cost level.
  19. Flammability: the ability of a material to burn with a flame under specified test conditions is called flammability.
  20. Count: A count indicates the mass per unit length or the length per unit mass of yarn.
  21. Hank: Hank is the traditional unit of length in the indirect system of yarn count; e.g., the cotton count of yarn is calculated as the number of hanks of 840 yds per pound. It is applied to a sliver, roving.
  22. Humidity: the term which is used to describe the moisture existing in the atmosphere is called humidity.
  23. Stress: Stress is the restoring force per unit area of a substance.
  24. Tenacity: the tensile force per unit linear density corresponding with the maximum force on an extension curve is called tenacity
  25. Luster: the display of different intensities of light, reflected both secularly and diffusely from other parts of a surface exposed to the same incident light, is called luster.
  26. Moisture Regain: the ratio of water in materials to the over-dry weight of this material expressed in percentage is called moisture regain.
  27. Moisture Regain: The ratio of water in a material to the total weight of the material expressed in percentage is called moisture content.
  28. Micronaire value: weight in micrograms per inch is called micronaire value. The micronaire value regards mass identification of maturity and fineness.
  29. Plasticity: after the elastic limit, when stress is increased, the material can not recover the extension if stress is removed is known as plasticity.
  30. Monomer: the individual small molecules from which the polymer is formed is called monomer. Example: ethylene is the monomer of polyethylene.
  31. Oligomer: a polymer composed form only a small number of monomeric units; hence oligomerization is called oligomer. In other words, a molecule that consists of only a few repetition units is called an oligomer.
  32. Sample: a separate unit or part representation of the lot, consignment, or design is called a sample.
  33. Creep: when a load is applied on a textile material, then instantaneous strain occurs in the fiber, and after release, the slow stress deformation will occur with the passing of time. This behavior of textile fiber is called creep.
  34. Seed Cotton: The cotton which has been harvested but not ginned so that the fiber is still attached to the seed is called seed cotton.
  35. Silver: An assemblage of fibers in continuous form without a twist is called a sliver.
  36. Slub: an abnormally thick place in a yarn is called a slub
  37. Regenerated fiber: the fiber which we get by regeneration from its main origin is called regenerated fiber.
  38. Staple fiber: A fiber of limited and relatively short length is called staple fiber.
  39. Swelling: swelling may be expressed in terms of the increase of diameter, area, length, or volume of fiber due to absorbing water.
  40. Thermal conductivity: thermal conductivity is the heat transfer rate along a body by conduction. The higher the thermal conductivity value, the more fiber will be, then more conducive.
  41. Glass Transition Temperature: the temperature at which the fiber behaves as a glass and brittle condition is called glass transition temperature. Tg denotes it.
  42. Melting Temperature: The range of temperature at which the fiber melts is called melting temperature. It is called Tm.
  43. Pressley’s Index: the ratio of breaking load in a pound of fiber to the weight of fiber in milligrams is called the Pressley’s Index.
  44. Fiber fineness: the fiber fineness is expressed in weight per unit length or length per weight.
  45. Fiber Maturity: Fiber maturity is a fiber characteristic that expresses the relative degree of thickening of the fiber wall.
  46. Maturity ratio: the ratio of the actual degree of wall thickening to the standard degree of wall thickening is called maturity ratio.
  47. Relative humidity: the ratio of the actual vapor pressure to the saturated vapor pressure at the same temperature expressed as a percentage is called as relative humidity.
  48. Testing Temperature: the atmosphere with a relative humidity of (65% +- 2%) and temperature of (200 +-20C) is called testing temperature.
  49. Standard temperature: An atmosphere at the prevailing barometric pressure with a relative humidity of 65% and temperature of 200 C is called standard temperature.
  50. Twist: the twist is the spiral disposition of the components of a thread which is usually the result of the relative rotation of the two ends is called twist.
Thanks for reading 50 common question for yarn manufacturing

If have any question besides 50 question or about 50 question, feel free to ask me by comment box.

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