Which of the following could lead to unexpected assembly failures?

Using mismatched components in an assembly can lead to unexpected failures due to incompatibilities in size, material properties, or load-bearing capacities. When components are not designed to work together, their interactions can create weaknesses or stress points that may not be apparent during initial assembly. For example, if a component is unable to handle the load or movement expected in the system, it may fail under operational conditions. In contrast, regularly conducting load tests, implementing industry-standard procedures, and following rigorous inspection protocols contribute to ensuring that the assembly is secure and reliable, thus reducing the risk of failure. These practices help identify potential weaknesses, ensure compatibility, and maintain compliance with relevant safety standards, all of which are crucial for the integrity of any assembly process.