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review the job description to identify key skills and knowledge areas. Research the specific role to tailor your study focus accordingly. Review Relevant Technical Knowledge Study refinery processes: Familiarize yourself with crude oil refining, distillation

e process of isolating sections of piping, vessels, or equipment to prevent the flow of hazardous substances during maintenance, inspection, or repair. This is achieved by installing physical barriers such as blind flanges, blanking plates, or caps that effectivel