WHICH_OF_THE_FOLLOWING_IS_USED_FOR_VULCANIZATION_OF_BUTYL_RUBBER_TO_PR – McqOptions

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1.	WHICH_OF_THE_FOLLOWING_IS_USED_FOR_VULCANIZATION_OF_BUTYL_RUBBER_TO_PRODUCE_VULCANIZATES_WITH_IMPROVED_HEAT_RESISTANCE_AND_AGING_CHARACTERISTICS??$
A.	sulphur
B.	oxime and red lead
C.	phenol-formaldehyde resins
D.	carbon black
Answer» D. carbon black

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