Dyeing /ডায়িং সেকশনের প্রশ্ন সমগ্র :
1.What are the problems associated by hard water in desizing / scouring/ bleaching/ mercerizing/ dyeing / printing / finishing?
2.What are the methods of water softening?
3.Classify water according to hardness.
4.What is hardness of water?
5.What is permanent hardness of water?
6.What is temporary hardness of water?
7. What is soap?
8.Which oils are used in soap manufacturing process?
9.What is detergent?
10.What are the advantages and disadvantages of non-ionic detergent?
11.Classify detergent.
12.What is singeing?
13.What are the objects of singeing?
14.Name some singeing machines
15.What is desizing?
16.What types of sizes commonly used for sizing?
17.Name some natural gum sizes or synthetic sizes
18.What are the methods of desizing?
19.What are the objects of desizing?
20.Define scouring, objects of scouring
21.How can you measure the quality of scouring?
22.What is keir? What are the types of kier?
23.What are the precautions to be taken for kier boiling process?
24.Which builders are used in scouring process and this purposes?
25.Define bleaching and object of bleaching
26.Name some bleaching agent
27.What are the steps of continuous bleaching process?
28.Which bleaching agent is suitable for cotton bleaching?
29.Name some oxidizing and reducing bleaching agent
30.What is dye or dyestuffs?
31.What is pigment?
32.What are the differences between dyes and pigments?
33.What is fastness?
34.What is color fastness? Give some example
35.What is a. water fastness?
b. Wash fastness
c. Perspiration fastness
d. Rubbing fastness
e. Light fastness
f. Sea water fastness
g. Chlorinated pool water
36.What do you know about primary color, secondary color, and tertiary color?
37. What are the primary colors in subs tract / pigment theory of color?
And in additive / light theory of color
38. Classify dyes on the basis of physical form and application method
39.Give some examples of water insoluble dyes and water-soluble dyes
40. What is concentration gradient?
41. What is absorption isoform?
42.What is auxochromo, chromophore group in dye stuffs?
43.Give some examples of hydrophilic and hydrophobic fibres?
44.On which factors dye selection depends?
45.Classify dyeing machines.
46.Give some examples of fibre dyeing m/c, yarn dyeing m/c and fabric dyeing m/c
47.Give some advantages and disadvantages of jet, jigger and winch dyeing m/c
48. What are the methods of semi-continuous and continuous dyeing m/c?
49.Why direct dye is called direct cotton dye and substantive dye?
50.What fibres are mainly dyed with acid dye?
51.Why acid, vat, direct, basic dyes are so called?
52.What is vatting?
53.Give some properties of direct, acid, basic and vat dye.
54.What is printing?
55.What are the styles of printing?
56.What is thickener?
57.What are the methods of printing?
58.What are the advantages and disadvantages of block printing m/c, screen-printing m/c, rotary printing m/c, transfer printing m/c and stencil printing m/c?
59.Difference between automatic flat bed screen-printing and rotary printing machine
ডাইজ ক্যামিকেল সেকশনের প্রশ্ন সমগ্র :
1. What is pigment ?
2. What are the properties of a good pigment?
3. What is organic and inorganic pigment?
4. What are the differences between dye and pigment?
5. How are pigments classified?
6. How is pigment worked as colorant?
7. How is pigment applied for dyeing textiles?
8. What are the advantages and disadvantages of pigment dyeing?
9. What are the fastness properties of pigment dyed fabrics?
10. How are the rubbing fastness properties of pigment dyed fabrics?
11. Name some well-known ancient natural dyes with mentioning sources.
12. Mention the stages of textile materials in which natural dyes can be applied.
13. Name the equipments necessary for home dyeing and very small-scale commercial dyeing in case of natural dyes.
14. What do you understand by natural Mordants?
15. What are the categories of natural dyestuffs?
16. What is synthetic Mordant?
17. What is Alizerine?
18. What are pre-metallised dyes?
19. What is 1:1 & 2:1 metal complex dye?
20. What are the fastness properties of pre-metallised dyes?
21. What are the disadvantages of metal complex dyes?
22. Why is dye aggregation?
23. Why is connective diffusion?
24. What is electrical double layer?
25. What is adsorption, sorption, desorption and diffusion?
26. What are the factors control rate of dyeing?
27. What is dyeing kinetics?
28. What is dyeing equilibra?
29. What are the factors that influence level dyeing?
30. What is pore model?
31. What is free volume model?
32. What is substantivity?
33. What is affinity?
34. What is chromophore group?
35. What is auxochrome?
36. What is partition co-efficient?
37. What is emulsion thickener?
38. What is oil in water emulsion?
39. What is synthetic thickener?
40. What are the advantages of synthetic thickener?
41. What is print paste rheology?
42. What is HLB? Mention the range of HLB
43. What is half emulsion?
44. How is screen-printing m/cs classified?
45. How is flat screen prepared?
46. What are the factors influence the penetration of paste through screen?
47. What is the squeeze systems used in flat screen-printing machine?
48. How is printing quality influenced by the following factors: by the stroke and by squeeze angle?
49. Why is adhesive system used in a fully automatic flat screen-printing m/c?
50. What is rotary screen?
51. What is the squeeze systems used in rotary screen-printing machine?
52. What are the advantages of rotary screen-printing machine?
53. What is the fundamental mechanism of screen-printing?
ফিনিশিং Finishing সেকশনের প্রশ্ন সমগ্র :
1. Define fabric finishing
2. Give the classification of fabric finishing
3. What are the objects of fabric finishing?
4. What are the factors to be considered to choice of finishing route?
5. What are the objects of calendaring machine?
6. What are the main elements of essentials of calendaring finish?
7. What are the types of damping m/c?
8. Give a general description of a calendaring m/c?
9. Describe a: swizzing finish b. friction calendaring c. chasting finish d. embossing
10. What is raising?
11. What is flunnel fabric and what is fleece fabric?
12. What are the types of raising m/c?
13. What is double acting m/c and single acting m/c?
14. What is emerizing?
15. What is polar fleece?
16. What do you mean by the term residual shrinkage?
17. What is sanforizing?
18. What are the objects of sanforizing process?
19. Explain sanforizing process with a schematic diagram
20. What do you mean by the term compressive shrinkage?
21. What is mercerization?
22. What are the objects of mercerization?
23. What physical and chemical changes happened in the cotton fibre by mercerization process?
24. What are the benefits obtained by the mercerization process?
25. Why strength, hygroscopicity, dye-affinity and luster increased by mercerization process?
26. What are the effects of tension on mercerization process?
27. What are the effects of temperature on mercerization process?
28. What are the effects of caustic soda concentration on mercerization process?
29. What are the effects of time of treatment on mercerization process?
30. What are the effects of washing condition on mercerization process?
31. How yarn can be mercerized in hank form and continuous sheet form?
32. Describe cloth mercerizing process
33. How mercerizing effect can be assessed?
34. What is resin?
35. What are the benefits of resin finishing on cotton fabric?
36. Give a general recipe for resin finishing
37. What is urea formaldehyde precondensate?
38. Give the probable reactions may happened at the time of treatment of cotton material with urea formaldehyde.
39. What are the advantages and disadvantages of urea formaldehyde resin?
40. What are the advantages and disadvantages of Kaurit AF140?
41. What are the advantages of di-methyl ethylene urea?
42. What is Kaurit AF140?
43. What are the advantages and disadvantages of DMEU?
44. Give the application procedure DMEU?
45. What is DMDHEU? (Di methylol di hydroxy ethylene urea)
46. Give the reactions has taken place with Di methylol di hydroxy ethylene urea and cotton
47. Give the application procedure of DMDHEU
48. What is water proof, water repellant and shower proof fabric?
49. What do you mean by the term durable water repellant finish/
50. Describe the application procedure of Valan PF and Cerol WB?
51. Give the application procedure of Persuitol VS & Phobotex FT?
52. What are poly siloxanes?
53. What are the types of poly siloxanes?
54. Describe the application procedure of silicon emulsion M478
55. Give the burning cycle of polymer
56. Give the thermal degradation chart of cellulose
57. What are the required properties of an ideal flame retardant chemical/
58. What are the types of flame retardant process/
59. Give the application procedure of Pyrovatex and THPC
60. What are the advantages of THPC over other flame retardant chemicals?
ডাইং PART-III
1. What are the minimum standards of dye house water quality?
2. Define German hardness, French hardness, English hardness and American hardness.
3. Classify water according to hardness
4. What are the bases of determination of total hardness by soap method?
5. What do you mean by the term “standard soap”? & How it can be prepared?
6. What is scudding factor and how it can be considered?
7. How temporary hardness can be determined by titration method?
8. What problems may arise in the boiler due to hardness?
9. What are the boilers feed water feeds standard?
10. What are the problems may arise in the processing due to hardness?
11. What are the conventional methods of water softening?
12. What is demineralization process? What do you mean by this term compacting?
13. What problem may arise in the processing due to iron contact in water?
14. How the iron problems can be minimized?
15. What do you mean by the term alkaline hardness?
16. How alkaline hardness can be determined?
17. Give the procedures of correction of alkalinity?
18. What do you mean by the term surface-active agent?
19. What are the mechanisms of oil/ dirt detachment from the fibre surface by detergents?
20. Give the classification of detergent
21. Give at least one example from each type of detergent
22. What are the special characteristics of amphoteric detergent?
23. How detergency power can be evaluated?
24. Why the use of softener is increasing day by day?
25. What are the desirable properties of textile softeners?
26. What are the types of textile softeners?
27. Why cationic softener is more used than the others?
28. Write about reactive softeners
29. Give the examples of anionic and non-ionic softeners
30. Write notes on amphoteric softeners
31. What are normal silicon softeners and what are amino-functional silicon polymers?
32. How you can distinguish silicon macro emulsion and silicon micro emulsion?
33. What are the outstanding advantages of silicon softeners?
34. How bacteria degrade and damage the fabric?
35. What are cellulose enzymes?
36. What are the conditions that can cause bacterial growth?
37. What are the requirements of an anti-bacterial agent?
38. How creating physical barrier for the bacterial attack can protect fabric?
39. Describe the methods of anti-bacterial finish by using toxic agent?
40. How fabric can be protected from bacteria by chemical modification?
41. What are the latest developments on anti-bacterial finish?
SPECIAL WET PROCESSING ( 4th year) সেকশনের প্রশ্ন সমগ্র :
1. What is foam?
2. What are the types of foam?
3. Why foam may be used for wet processing?
4. What is blow ratio?
5. What is foam density?
6. What is litre weight?
7. Give a relationship between foam density, blow ratio and litre weight
8. How the quality of can be evaluated?
9. Describe FFT process of foam application
10. Describe MITTER foam applicator for carpet
11. Mention with suitable sketch the RSF foam application
12. Describe Jannus mini foam application
13. Describe Monforts foam application
14. What are the advantages & disadvantages of foam process?
15. Why solvent may be used for dyeing media?
16. What are the requirements of an ideal solvent for dyeing?
17. What are the limitations of use solvent in dyeing?
18. Compare trichloro ethane, per chloro ethane & 1,1,1 trichloro ethane with water as a dyeing media
19. Why polyester can be dyed successfully at 100’c temp without carrier by using solvent?
20. What are the advantages and disadvantages of solvent dyeing?
21. What are the light sensitive parts of a human eye?
22. What do you mean by angle of sight?
23. What is rod and cone?
24. What is SCOTOPIC VISION?
25. What are the types of cone cells?
26. What is luminosity curve?
27. What is PHOTOPIC VISION?
28. What is cone sensitivity curve?
29. What are the reasons of defective color vision/
30. What do you mean by the term Monochromates, dichromates and trichromates?
31. What do you mean by the term Anomalous trichromates?
32. Describe the term Metamerism
33. Why lamp options are necessary?
34. Describe D65,TL84, CWF, U30, W, F, UV etc
35. What is color-rendering index (CRI)?
36. Describe trimatic theory of color vision
37. What are the limitations of trimatic theory of color vision?
38. What do you mean by CIE?
39. What do you mean by the term CIE X42?
40. What are hue, value, chroma?
41. What are the properties of CIE l* a* b* color space?
42. Describe the meaning of L* a* b*
43. What do you mean by the terms a. color difference b. standard observer c. color contrast
44. Describe Monochromatic contrast and polychromatic contrast
45. Describe successive contrast and simultaneous contrast
46. Describe contrast of hue & contrast of true
47. What do you mean by the term color harmony?
48. Describe with further classification, harmony of analogy & Harmony of contrast
49. What do you mean by the term CCM system?
50. What are the things needed for CCM system?
51. Describe the available software
52. Give a flow diagram of CCM system
53. What is Kubelka-Munk theory?
54. What is Lambert-Bur theory?
55. What do you mean by the term K/S value?
56. What database is required for CCM system?
57. What optical models are used in CCM system?
58. What are the characteristics of raw effluent of a dye house?
59. What are the minimum qualities of effluent required to discharge in natural watercourse?
60. What is BOD and what is COD?
61. What are the harmful effects of effluent on environment if it is not treated?
62. Give a ideal flow diagram of a effluent treatment and disposal system
63. What do you mean by the term chemical coagulation?
64. What do you mean by the term primary clarifier and secondary clarifier?
65. Why biological treatment needed for the effluent?
66. What are the types of sludge handling system?
1. Give a schematic diagram of vapor loc system of scouring & also give the
recipe
2. What are the advantages and disadvantages of vapor loc system of scouring?
3. What do you mean by the term solvent scouring?
4. Mention with flow diagram of solvent scouring of cotton fabric
5. What are the advantages and disadvantages of solvent scouring?
6. How scouring effect can be estimated?
7. How bleaching effect can be estimated?
8. How mercerizing effect can be estimated?
9. Describe the methods of determination of available chlorine in bleaching powder
10. Describe the methods of determination of strength of hydrogen peroxide
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