Which of the following can cause failure in rubber linings?

When considering factors that can lead to failure in rubber linings, storing rubber in a hot environment is a significant concern. Elevated temperatures can accelerate aging and degradation of rubber materials. Heat can cause the rubber to harden, lose its elasticity, and result in cracking or other physical changes that compromise the integrity of the lining. Over time, exposure to excessive heat can diminish the protective qualities of the rubber, making it less effective for its intended application.

Using rubber before the expiration date does not inherently lead to failure as it often remains usable within that timeframe, assuming it has been properly stored and maintained. Selecting the correct rubber for service is crucial for performance but does not directly cause failure if the wrong type is chosen; rather, it may lead to suboptimal performance. Similarly, applying rubber correctly is essential for ensuring the effectiveness of the lining, but incorrect application does not relate to the storage conditions that exacerbate material degradation.

Therefore, the impact of high-temperature storage on rubber's physical and chemical properties is a primary concern that can lead to premature failure in rubber linings.