300+ TOP Wet processing engineering Interview Questions – Answers

  1. 1. What Is Dye?

    Dye is a color substance which has ability to create bond with fiber.

  2. 2. What Is Pigment?

    Pigment is a color substance which has not any ability to create bond with fiber.


  3. Chemical Engineering Interview Questions

  4. 3. Dyes Or Pigment, Which One Can Use For Coloration Of Any Types Of Fiber?

    Pigment.

  5. 4. When Binder Is Used?

    Binder is used in pigment printing. 

  6. 5. Which Process Is Used For Fixation Of Pigment Color?

    Curing. 


  7. Textile Interview Questions

  8. 6. Which Process Is Used For Fixation Of Color Dyeing?

    Steaming. 

  9. 7. What Is Shade?

    Shade is a depth of color.


  10. Textile Graphic Designer Interview Questions

  11. 8. What Is Shade%?

    Shade% is defined an amount of dye in a textile material. 

  12. 9. How Much The Capacity Of Atmospheric Dyeing Machine?

    600 kg/batch. 


  13. Fashion Designer Interview Questions

  14. 10. How Much The Capacity Of Hthp Dyeing M/c?

    700 kg/batch.

  15. 11. What’s The Reason For Producing Uneven Dye Shade?

    Uneven dyeing, improper chemical use, improper cycle time.


  16. WASH Officer (Water, Sanitation, and Hygiene) Interview Questions

  17. 12. What Is Sizing?

    Sizing is a process in which size material like starch, guran etc is used in warp yarn.


  18. Chemical Engineering Interview Questions

  19. 13. What Is The Percentage Of Light Shade?

    0.4% to 1%. 

  20. 14. For Which Fabric Mercerizing Is Done?

    Woven. 

  21. 15. What Is The Reason Of Doing Mercerizing?

    Increase luster and absorbency. 


  22. Garments Interview Questions

  23. 16. For Which Strength Of Fabric Is Increase?

    Mercerizing. 

  24. 17. What Is Fastness?

    Fastness is the capacity of fiber to contain color on its own structure.


  25. Garment Washing Interview Questions

  26. 18. Which Dye Is Used In Denim?

    90% denim is dyed by vat dye.


  27. Textile Interview Questions

  28. 19. Why Stabilizer Is Used In H2o2 Bleaching?

    For maintain the proper action of H2O2. 

  29. 20. What The Range Of Rubbing Fastness Of Vat Dye?

    2-3, Bad.

  30. 21. What’s The Meaning Of Hydroextactors?

    Removing water.

  31. 22. For Removing Hairiness From Woven Fabric Which
    Process Is Used?

    Singing.

  32. 23. Which Process Is Used For Removing Hairiness From Knit Fabric?

    Bio –technology.

  33. 24. Why Stenter M/c Is Used?

    For GSM control.


  34. Textile Graphic Designer Interview Questions

  35. 25. What’s The Object Of Scouring?

    To removing natural impurities (wax,fat,pectin).

  36. 26. What Is The Object Of Bleaching?

    To produce white color by removing off white color of cotton.

  37. 27. Which Agent Used In Scoring?

    NaOH.


  38. Fashion Designer Interview Questions

  39. 28. Which Agent Used In Bleaching?

    Ca(OCl)2 , H2O2

  40. 29. What Kinds Of Color Theory Are Present?

    1. Pigment theory.
    2. Light theory.
  41. 30. Give The Major Color Of Light Theory?

    Red, Yellow, Blue.

  42. 31. Give The Primary Color Of Pigment Theory?

    Cayan, maganda,yellow.

  43. 32. How Black Color Is Produce?

    By equal mixture of red, yellow ,blue.

  44. 33. How Green Color Is Produce?

    By equal mixing of blue and red.


  45. WASH Officer (Water, Sanitation, and Hygiene) Interview Questions

  46. 34. How Maganda Color Is Produce?

    By equal combination of red and yellow.

  47. 35. The Dye Which Are Used For All Kind Of Fiber Dying?

    Vat dye.

  48. 36. The Dyes Which Are Used For Cotton Fiber Dying?

    Reactive dye, Vate dye,Sulphur dye,Azoic dye.


  49. Garments Interview Questions

  50. 37. The Dye Which Are Used For Polyester Fabric Dyeing?

    Disperse dye.

  51. 38. What Is Bod?

    Biological oxygen demand.

  52. 39. What Is Cod?

    Chemical oxygen demand.

  53. 40. What Is Effluent?

    The water with chemical which is drained after dyeing.


  54. Garment Washing Interview Questions

  55. 41. The Indicators Which Are Very Important For Dyeing?

    Time, Temperature, ph

  56. 42. What Is Hardness?

    The presence of Ca and Mg salt in water is called hardness.

  57. 43. What Is Temporary Hardness?

    The presence of bi-carbonate salt of Ca and Mg.

  58. 44. How Temporary Hardness Is Removed?

    Simply by heating.

  59. 45. What Is The Meaning Of Wtp?

    Water treatment plant.

  60. 46. What Is Scal?

    Scal is the mixture of CaCO3 & Mg(OH)2

  61. 47. What Is Etp?

    Effluent treatment plan.

  62. 48. What Is Substantively?

    The rate of dye transfer from the dye solution to the textile material, also the distribution of dye molecules in the textile material.

  63. 49. What Happened For Deep Shade?

    Fastness properties of dye increased and decreased of washing fastness.

  64. 50. What Is Affinity?

    The attraction of dyes to the textile material.

  65. 51. What Is Color Strike?

    Intial exhaustion on the fibre in a dye bath.

  66. 52. What Is Exhaustion?

    It is the process when adsorption, sorption and desorption completed then total dye molecules enters into fibre

  67. 53. What Is Adsorption?

    It is the process when dye molecules cime to the surface of the fibre.

  68. 54. What Is Sorption?

    It is the process when dye molecules enter into the fibre

  69. 55. What Is Desorption?

    The proocess by which the dye molecules come out from the inner side of the textile material in particular condition (mil, time, temple).

  70. 56. What Is Fixation?

    After washing which amount of dyes are contact with the fibre.

  71. 57. Is The Pigment Water Soluble?

    Pigment is 100% water insoluble.

  72. 58. What Is Reactive Dye?

    Dye that reacts with the textile fiber to produce both a hydroxyl and an oxygen linkage, the chlorine combining with the hydroxyl to form a strong ether linkage; gives fast, brilliant colors.

  73. 59. With Which Fibre Reactive Dye Maninly React?

    Cellulose fibre.

  74. 60. Why Reactive Dye Is So Called?

    Reactive dye contain reactive group and this reactive group makes covalent bonds with the fibres and becomes part of the fibre, thats why reactive dye is so called.

  75. 61. What Is The General Formula Of Reactive Dye?

    General formula of reactive dye

    Where ,

    R= Chromophore,

    C= Cellulose.

  76. 62. Why Reactive Dyes Popular?

    Good washing fastness, good light shade, lower cost, easier method etc.

  77. 63. Which Parameter Reactive Group Do Not Contribute?

    Color, which is determined by chromogen group.

  78. 64. What Is The Reaction Between Reactive And Cellulose Fibre?

    Reaction between reactive and cellulose fiber

  79. 65. What Is The Relation Between Vinyl Sulhone Group And Halogen Group?

    The reactivity of vinyl sulhone group is less than halogen group.

  80. 66. If No Reactive Group Increase Then What Happened?

    Binding also increase depending on dye structure.

  81. 67. Reactive Dye Absorp Up To _?

    Up to 90%

  82. 68. If The Molecular Weight Of Reactive Group Increases Then What Happened?

    Reactivity increases.

  83. 69. Reactivity Of Vinyl Sulhone Group And Halogen Group Increases With Which Parameters?

    PH and time.

  84. 70. What Is The Chemical Structure Of Cellulose Molecule?

    Chemical structure of cellulose molecule

  85. 71. What Is The Reaction Ratio Between -ch2oh And –choh (in Case Of Monochloro Triazinyl)?

    15:1

  86. 72. What Is The Reaction Ratio Between -ch2oh And –choh(in Case Of Dichloro Triazinyl)?

    3:1 to 7:1

  87. 73. How Many Types Of Reactive Dye On The Basis Of Reactive Group?

    2 types (1. Halogenated heterocycles, 2. Acivated vinyl compounds.).

  88. 74. Which Groups Are In Halogenated Heterocycles?

    1. Triazine group (Procion, Cibacron, Pyrimidine etc),
    2. Quinoxaline (Levafix, Dichloro quinuxaline).
  89. 75. Give Some Examples Of Activated Vinyl Groups?

    Vinyl sulphone (Remazol), vinyl sulphonamide (Levafix), vinyl acrylamide (Primazine).

  90. 76. How Many Types Of Reactive Dye On The Basis Of Reactivity?

    1. High reactivity (Procion M),
    2. Moderate reactivity(Liva fix E),
    3. Low reactivity (Premazine).
  91. 77. Reactive Dye Can Be Divided Into _ Group?

    Hot brand and cold brand.

  92. 78. How Many Types Of Reactive Dye On The Basis
    Chemically?

    1. Chloro triazinyl,
    2. Vinyl sulphone,
    3. Heterocycle halogen.
  93. 79. Fastness Of Procion Scarlet Mx-g?

    • Light: 4,
    • washing: 4,
    • hydro chlorite bleaching: 2.
  94. 80. What Is Hydrolysis Of Reactive Dye?

    The reaction of dye with water.

  95. 81. What Are The Stages Of Reactive Dye?

    1. Exhaustion of dye,
    2. Fixation,
    3. Wash off.
  96. 82. Why An Electrolyte Is Necessary When Fibre Is Immersed In Dye Liquor?

    To assist the exhaustion of dye.

  97. 83. What Is Used As Electrolyte In Reactive Dye?

    NaCl.

  98. 84. How Fixation Controlled?

    By maintaining proper PH by adding alkali.

  99. 85. Why Wash Off Applied & Why It Is Necessary?

    To remove extra and unfixed dyes from material surface and is necessary for level dyeing and good wash fastness.

  100. 86. What Are The Controlling Parameters Of Reactive Dye?

    PH, temperature, dyeing time, liquor ratio,concentration of electrolyte

  101. 87. What Is The Recipe For Cold Band Reactive Dye?

    • Dye:3%
    • salt:60 gm/l
    • soda ash:15gm/l
    • M:L : 1:10
    • temp:60º C
    • time:1hr.
  102. 88. What Is The Recipe For Hot Band Reactive Dye?

    • Dye:4%
    • salt:80gm/l
    • soda ash:20gm/l
    • M:L : 1:15
    • temp:50-90º C
    • time:1-0.5hr
  103. 89. What Are The Dyeing Methods?

     1. Discontinuous method:

    {Jigger dyeing machine

    (woven), Winch dyeing machine (knitted), Jet dyeing

    machine (woven + knitted)},

    2. Semi continuous method:

    (Pad jig method, Pad steam method),

    3. Continuous method:

    (Pad dry method, Pad steam method).

  104. 90. Why Disperse Dye Is So Called?

    Because it is non soluble, non ionic dye and molecularly dispersed, further dispersing agents are used with the dye.

  105. 91. Fastness Of Disperse Dye Is?

    Light fastness rating 4-5 and washing fastness is 3-4.

  106. 92. Why Sublimation Power Of Disperse Dye Is Good?

    Stable electron management.

  107. 93. Name Some Disperse Dye?

    Terrasil, Foron, Palanil, pesonil, Samara, Dispersal.

  108. 94. Why Disperse Dye Is Added To Water With Surface Active Agent?

    To form an aqueous dispersion.