Polyester slings are resistant to _____ and ______.

• A. bases and solvents
• B. water and air
• C. common acids and hot bleaching agents
• D. oxidizing agents and alcohols

Answer: (C)

Polyester slings have good chemical tolerance to many substances they encounter in lifting tasks, especially acidic environments and bleaching conditions used in textiles. The aromatic polyester structure resists hydrolysis and degradation by common acids and by hot bleaching agents, so exposure to these chemicals is less likely to weaken the sling quickly. This makes them a practical choice when acids and bleaching agents might be present. However, they can be more vulnerable to strong oxidizers, certain bases, or aggressive solvents, so those exposures require caution. The statement reflects the general compatibility pattern of polyester slings with common acids and hot bleaching agents, which is why it is the best fit among the options.