Interview question based on skill :
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Total Questions: 20
1. What is added to rubber to make it a thermosetting polymer?
Correct Answer is : Sulphur
2. Rubber latex is used for:
Correct Answer is : Bonding rubber to wood
3. Rubber seed oil can be used in:
Correct Answer is : Paint
4. Recycled crumb rubber can be used in:
Correct Answer is : Concrete
5. What is resilience?
Correct Answer is : Elasticity
6. The polymers which possess the property of elastic is called rubber.
Correct Answer is : TRUE
7. The temporary deformation of rubber take place after applying the _______ stress.
Correct Answer is : More than 600e.u
8. The elasticity of the rubber is due to its ___________
Correct Answer is : Helix
9. Isoprene in natural rubber exists in ___________ geometrical isomeric forms.
Correct Answer is : 2
10. Cis-poly isoprene is present in ________
Correct Answer is : Hevea rubber
11. The latex is diluted to _________ and filtered to remove suspended impurities.
Correct Answer is : 15-20%
12. The filtered latex is sent into the tanks and treated with __________
Correct Answer is : Acetic acid
13. The rubber coagulates into soft _________ colour mass.
Correct Answer is : White
14. While producing the crepe rubber, the coagulam is passed between two rollers of about _________ wide.
Correct Answer is : 50cm
15. While producing the smoked rubber, the filtered latex is fed into long rectangular tanks of _________ deep.
Correct Answer is : 30cm
16. While producing smoked rubber, the latex and reacted with formic acid, the vertical partition plates are inserted and left undisturbed for _________
Correct Answer is : 16 hours
17. While producing the smoked rubber, the sheets are hanged for about _________ in smoked chambers.
Correct Answer is : 4 days
18. To produce the smoked rubber, the rubber sheets are hanged in smoked chambers at __________
Correct Answer is : 40-50oC
19. Solvent extraction process is used to extract __________
Correct Answer is : Gutta percha
20. In solvent extraction process, the mature leaves are grounded and heated about _________
Correct Answer is : 70oC
