TXMI Final questions n answers
2025/2026
Which one is defined by extension per unit length? - correct answer ✔✔Strain
The stress-strain curve of polymer first goes through a plastic region before elastic region -
correct answer ✔✔False
Care describes the treatment required to maintain textile product's original appearance but not
cleanliness - correct answer ✔✔False
Which of these are polyolefin's? - correct answer ✔✔all the above
Elastic fibers (highly stretchable) made of polymers with glass transition temperature which is -
correct answer ✔✔much below/above temperature
Comfort includes the way textiles affect - correct answer ✔✔heat transfer, moisture transfer, air
transfer
The greater polarity of the surface the better is the wetting - correct answer ✔✔True
Durability describes the manner in which the product withstands use, that is, the length of time
the product is considered suitable for the use for which it was purchased. - correct answer
✔✔True
Environmental concerns focus on impact of textiles on environment during - correct answer
✔✔Production, Care, Use, Disposal
,Major class/es of chemical reactions used for synthesis of polymers - correct answer ✔✔chain
polymerization
polycondensation
The terms "repeating unit" can be used interchangeably in all cases - correct answer ✔✔False
Polarization of covalent bonds in polymer is the mechanism responsible for intermolecular
forces - correct answer ✔✔True
Young modulus unit are - correct answer ✔✔Nm2, Pa
More crystalline polymer causes - correct answer ✔✔stronger polymer, less flexible polymer
Serviceability deals with comfort of the product - correct answer ✔✔True
Nylon 6,6 - correct answer ✔✔2 monomers (through condensation polymerization)
Adipic acid
Hexamethylene diamine
Major 5 Classes of synethic polymers used in textile industry are: - correct answer ✔✔-
polyarcylates
- polycarbonates
- polyolefins
- polyesters
- polyamide
- polyvinyl
, - polyurethane
- cellulosic polymers
Melting temperature corresponds to: - correct answer ✔✔amorphous to glassy state phase
transition
crystalline to amorphous phase transition
Polymers are processed (to shape fibers and make other commodity plastic shapes) at
temperature that are: - correct answer ✔✔above/below the glass transition temper, Tg
Polymer chains interact with each other via inter-molecular forces - correct answer ✔✔True
Polymer molecules are chain-like molecular structures with the most probable coil-like
conformation of chains - correct answer ✔✔True
Above the glass transition temperature: - correct answer ✔✔- polymers become brittle
- polymers become softer
- polymer crystalline structure is melted
- polymer undergoes transition from glass to viscous-elastic state
Young modulus stands for ratio of stress over strain - correct answer ✔✔True
Kevlar is an example of Polyacrylate - correct answer ✔✔False
Textiles are flexible material that are compared of - correct answer ✔✔- thin films of polymers,
fibers, yarns, or fabrics
2025/2026
Which one is defined by extension per unit length? - correct answer ✔✔Strain
The stress-strain curve of polymer first goes through a plastic region before elastic region -
correct answer ✔✔False
Care describes the treatment required to maintain textile product's original appearance but not
cleanliness - correct answer ✔✔False
Which of these are polyolefin's? - correct answer ✔✔all the above
Elastic fibers (highly stretchable) made of polymers with glass transition temperature which is -
correct answer ✔✔much below/above temperature
Comfort includes the way textiles affect - correct answer ✔✔heat transfer, moisture transfer, air
transfer
The greater polarity of the surface the better is the wetting - correct answer ✔✔True
Durability describes the manner in which the product withstands use, that is, the length of time
the product is considered suitable for the use for which it was purchased. - correct answer
✔✔True
Environmental concerns focus on impact of textiles on environment during - correct answer
✔✔Production, Care, Use, Disposal
,Major class/es of chemical reactions used for synthesis of polymers - correct answer ✔✔chain
polymerization
polycondensation
The terms "repeating unit" can be used interchangeably in all cases - correct answer ✔✔False
Polarization of covalent bonds in polymer is the mechanism responsible for intermolecular
forces - correct answer ✔✔True
Young modulus unit are - correct answer ✔✔Nm2, Pa
More crystalline polymer causes - correct answer ✔✔stronger polymer, less flexible polymer
Serviceability deals with comfort of the product - correct answer ✔✔True
Nylon 6,6 - correct answer ✔✔2 monomers (through condensation polymerization)
Adipic acid
Hexamethylene diamine
Major 5 Classes of synethic polymers used in textile industry are: - correct answer ✔✔-
polyarcylates
- polycarbonates
- polyolefins
- polyesters
- polyamide
- polyvinyl
, - polyurethane
- cellulosic polymers
Melting temperature corresponds to: - correct answer ✔✔amorphous to glassy state phase
transition
crystalline to amorphous phase transition
Polymers are processed (to shape fibers and make other commodity plastic shapes) at
temperature that are: - correct answer ✔✔above/below the glass transition temper, Tg
Polymer chains interact with each other via inter-molecular forces - correct answer ✔✔True
Polymer molecules are chain-like molecular structures with the most probable coil-like
conformation of chains - correct answer ✔✔True
Above the glass transition temperature: - correct answer ✔✔- polymers become brittle
- polymers become softer
- polymer crystalline structure is melted
- polymer undergoes transition from glass to viscous-elastic state
Young modulus stands for ratio of stress over strain - correct answer ✔✔True
Kevlar is an example of Polyacrylate - correct answer ✔✔False
Textiles are flexible material that are compared of - correct answer ✔✔- thin films of polymers,
fibers, yarns, or fabrics
