300+ TOP Rubber Technology MCQs and Answers

Rubber Technology Multiple Choice Questions

1. The role of silicon emulsion in rubber product manufacturing is as a

A. Froathing agent
B. Mould releasing agent
C. Dispersing agent
D. Plasticiser

Answer: B

2. Magnesium ammonium sulphate is otherwise known as

A. Slurry
B. Serum
C. Sludge
D. None of the above

Answer: C

3. Hardness is measured in

A. MPa
B. N/mm
C. Shore A
D. Poise

Answer: C

4. Tripsometer is an instrument used to determine

A. Abrasion resistance
B. Cure time
C. Rebound resilience
D. Compression set

Answer: C

5. The process of reusing the scrap in to products after chemical treatment is termed as

A. Recycling
B. Reclaiming
C. Reusing
D. Relaxing

Answer: B

6. Necking or Pearling is a defect associated with

A. Latex thread
B. Latex foam
C. Latex balloons
D. All the above

Answer: A

7. The bleaching agent used in Pale latex crepe

A. Sodium sulfite
B. Xylyl mercapton
C. Thiokol
D. Carbondisulphide

Answer: B

8. Flat spotting of tyres usually occur in

A. Steel chords
B. Polyester chords
C. Nylon chords
D. Aramid chords

Answer: C

9. The unit of tensile strength is

A. N/m
B. Kg/cm
C. MPa
D. %

Answer: C

10. Which of the statement is not true about radial tyres?

A. They have good cornering grip
B. Good directional stability
C. Low heat build up
D. Low fuel consumption

Answer: B

11. The slope of the stress-strain graph gives the

A. Modulus
B. Tensile strength
C. Elongation at break
D. Tear strength

Answer: A

12. Monomers of butyl rubber are

A. Isobutene, isoprene
B. Isobutadiene, isoprene
C. Isobutylene, isoprene
D. Isobutylene, isobutadiene

Answer: C

13. Friction ratio refers to

A. Difference in roller speed
B. Spacing between rollers
C. Ratio of length to diameter of the rollers
D. Difference in roller size

Answer: A

14. Which is used as an anticoagulant?

A. Ammonia
B. Sodium sulfite
C. Formalin
D. All the above

Answer: D

15. PAN, PBN etc are used in rubber compounding as

A. Anti oxidant
B. Anti ozonant
C. Both
D. Filler

Answer: A

16. Which of the following property decreases with increase in crosslink density?

A. Modulus
B. Set
C. Resilience
D. Tensile strength

Answer: B

17. A cellular product with closed cell structure

A. Sponge
B. Foam
C. Both
D. Micro cellular sheet

Answer: D

18. EPNR stands for

A. Ethylene propylene natural rubber
B. Ethylene propylene diene rubber
C. Epoxidised natural rubber
D. Enzyme proteinated natural rubber

Answer: C

19. In radial tyres chords are at what angle to the axis of rotation?

A. 60 degree
B. 120 degree
C. 30-40 degree
D. 90 degree

Answer: D

20. The percentage of dirt in ISNR 5 is

A. 0.05%
B. 5%
C. 0.5%
D. 0.005%

Answer: A

21. For the production of hawai sole, natural rubber should be blended with

A. Butyl rubber
B. Styrene butadiene rubber
C. Nitrile rubber
D. EPDM

Answer: B

22. High dosage of stearic acid is desirable in the compounding of which rubber product?

A. Ebonite
B. Sponge
C. Door mat
D. None of these

Answer: B

23. Cells in latex foam are

A. Partially opened and partially closed
B. Completely open
C. Closed
D. Devoid of cells

Answer: A

24. Renacit is a chemical name of a

A. Filler
B. Plasticiser
C. Anti oxidant
D. Peptiser

Answer: D

25. Masterbatch is a

A. Compounding ingredient
B. Partially compounded rubber mix
C. Compounded rubber mix
D. Compounding equipment

Answer: B

26. The inorganic rubber among the following is

A. Nitrile rubber
B. Chloroprene rubber
C. Butyl rubber
D. Silicone rubber

Answer: D

27. The percentage of ammonia in HA latex is

A. 0.6%
B. 0.9%
C. 0.3%
D. 0.4%

Answer: A

28. Crack growth is minimum for

A. SBR
B. CR
C. NR
D. NBR

Answer: C

29. CV rubber refers to

A. Chemically viscous rubber
B. Clear viscosity rubber
C. Continuous vulcanized rubber
D. Constant viscosity rubber

Answer: D

30. Antimony oxide is an additive which imparts

A. Heat resistance
B. Flame resistance
C. Conductivity
D. Weather resistance

Answer: B

31. Potassium Oleate is added to the latex compound to

A. improve the tackiness
B. increase the viscosity of latex
C. stabilize the latex
D. cheapen the latex

Answer: C

32. Butyl rubber is cured with

A. Sulphur
B. Peroxides
C. Metal oxides
D. Dioximes

Answer: D

33. Which of the following is not a quality test for latex foam?

A. Hardness
B. Flexing resistance
C. Compression set
D. Tensile strength

Answer: D

34. High VFA value of a latex compound indicate its

A. Poor state of preservation
B. Good state of preservation
C. High level of Ammonia
D. Low level of Ammonia

Answer: A

35. The standard size of a mixing mill is

A. 7” × 15”
B. 8” × 24”
C. 6” × 12”
D. None of these

Answer: C

36. Latex thread is manufactured by

A. Dipping
B. Extrusion
C. Gelling
D. Casting

Answer: B

37. Identify the synthetic rubber that shows low gas permeability

A. NR
B. SBR
C. IIR
D. CR

Answer: C

38. Gelling agent used in foams

A. Sodium alginate
B. Sodium bi carbonate
C. Sodium carbonate
D. Sodium silico fluoride

Answer: D

39. Which among these is not a coacervant?

A. Ammonium nitrate
B. Calcium chloride
C. Calcium nitrate
D. Acetic acid

Answer: A

40. For the vulcanisation of chloroprene rubber the curing agent used is

A. Sulphur
B. Per oxide
C. Metal oxide
D. Radiational vulcanization

Answer: C

41. Markham still apparatus is used to find

A. DRC
B. TSC
C. VFA
D. MST

Answer: C

42. The delayed action accelerator used is

A. MBT
B. DPG
C. CBS
D. TMTD

Answer: C

43. The test conducted to determine the level of proteins in latex is

A. Total solid content
B. Ammonia content
C. Coagulum content
D. Sludge content

Answer: B

44. Product that is manufactured by wrapped mandrel moulding is

A. Pipe
B. Cable
C. Belt
D. Hose

Answer: D

45. Which of the following is a continuous vulcanisation method?

A. Auto clave curing
B. Liquid curing
C. Steam curing
D. Batch curing

Answer: B

46. The synthetic rubber with low resilience is

A. NR
B. PBR
C. EPDM
D. IIR

Answer: D

47. FEF is a type of

A. Reinforcing filler
B. Accelerator
C. Activator
D. Flame retardant

Answer: A

48. Accelerator for chloroprene rubber is

A. MBTS
B. TMTD
C. Ethylene thiourea
D. Mercapton

Answer: C

49. Amount of inorganic content of a rubber is calculated from its

A. Nitrogen content
B. Ash content
C. Magnesium content
D. Coagulum content

Answer: B

50. DRC% of field latex is

A. 30-40
B. 40-50
C. 50-60
D. 20-30

Answer: A

51. Rubber hydrocarbon content of whole tyre reclaim

A. 50%
B. >50%
C. <50%
D. 0%

Answer: A

52. EBC is a form of

A. Crumb rubber
B. Crepe rubber
C. Special purpose rubber
D. Block rubber

Answer: B

53. Which of the following property is best in mono-sulphidic vulcanisation systems?

A. Heat resistance
B. Fatigue resistance
C. Tensile strength
D. Modulus

Answer: A

54. Schwratz value is a quality assessment of

A. Latex foam
B. Balloons
C. Sponge
D. Latex thread

Answer: D

55. Which among these is not considered as a quality control test for latex?

A. VFA
B. N2 content
C. Sludge content
D. Ammonia content

Answer: B

56. The equipment used for preparing dispersion

A. Bal mill
B. Ultrasonic mill
C. Attrition mill
D. All the above

Answer: D

57. Identify the additive used as white pigment

A. Titanium di oxide
B. Clay
C. Whiting
D. Carbon black

Answer: A

58. Metrolac is an equipment used to determine the

A. TSC
B. DRC
C. MST
D. VFA

Answer: B

59. Which among these cannot be considered as a general purpose rubber?

A. Styrene butadiene rubber
B. Chloroprene rubber
C. Butyl rubber
D. Poly butadiene rubber

Answer: A

60. Trans isomer of poly isoprene is

A. Gutta purcha
B. Isoprene
C. Polybutadiene
D. Buna-S

Answer: A

61. Which of these refers to determine the stability of latex on stirring?

A. MST
B. VFA
C. KOH
D. Sludge

Answer: A

62. KOH is added to the latex compound as

A. Emulsions
B. Dispersion
C. Suspension
D. None of these

Answer: D

63. Which is considered as cool running?

A. Bias tyre
B. Radial tyre
C. Bias belted tyre
D. All the above

Answer: B

64. If the amount of sulphur is higher than that of the accelerator, the vulcanization system is a/an

A. Efficient
B. Semi efficient
C. Open
D. Conventional

Answer: D

65. An example of a copolymer is

A. Polybutadiene rubber
B. Chloroprene rubber
C. Nitrile rubber
D. Silicone rubber

Answer: C

66. The concentration method which works on stroke’s formula is

A. Centrifuging
B. Electro decantation
C. Creaming
D. Evaporation

Answer: C

67. Which is not used as an anticoagulant?

A. Ammonia
B. Sodium sulphite
C. Boric acid
D. Acetic acid

Answer: D

68. The heating test done to detect halogens in a polymer is

A. Muller’s test
B. Beilsetins test
C. Webber test
D. Miller’s test

Answer: B

69. With increase of filler loading the heat build up of a rubber compound

A. Increases
B. Decreases
C. Increases and then decreases
D. Neither increases nor decreases

Answer: A

70. Balloons are prepared by dipping formers in

A. Unvulcanised latex
B. Vulcanised latex
C. Prevulcanised latex
D. Field latex

Answer: C

71. The accelerator used in latex compounding is

A. MBT
B. MBTS
C. ZDC
D. TMTD

Answer: C

72. Fill factor is associated with

A. Two roll mill
B. Extruder
C. Kneader
D. Banburry machine

Answer: D

73. Hollow articles are made by

A. Compression moulding
B. Injection moulding
C. Transfer moulding
D. Blow moulding

Answer: D

74. The solvent for natural rubber is

A. Cyclo hexane
B. Chloroform
C. Benzene
D. Acetone

Answer: D

75. The dimension of the extruded product as it comes out of the die will be

A. Larger than the die diameter
B. Smaller than the die diameter
C. Same as the die
D. Cannot be predicted

Answer: A

76. Pot is used in

A. Injection moulding
B. Transfer moulding
C. Compression moulding
D. Blow moulding

Answer: B

77. Friction ratio of a mixing mill

A. 1 : 2.5
B. 1 : 1.5
C. 1 : 1.25
D. 1 : 0.25

Answer: C

78. De Lavel machine is used in

A. Evaporation
B. Creaming
C. Electro decantation
D. Centrifuging

Answer: D

79. The grade of ISNR used in tyre industry

A. ISNR 5
B. ISNR 10
C. ISNR 20
D. ISNR 50

Answer: C

80. Upside down mixing is recommended for

A. CR
B. EPDM
C. SBR
D. Silicone rubber

Answer: B

Rubber Technology Objective Questions with Answers Pdf Download Online Quiz Test