Which of the following is a contractor responsibility during refractory installation?

The contractor's responsibility during refractory installation primarily includes the execution of the installation work. This encompasses the practical aspects of the project, such as ensuring that the materials are applied correctly, following appropriate installation techniques, and adhering to safety standards and the specifications established for the refractory material and system.

In the context of refractory installation, the contractor is tasked with handling all aspects of the installation process, which includes coordinating resources, managing the timeline of the project, and working effectively with other stakeholders on-site. Successful execution is critical to ensure that the refractory lining performs as intended and meets quality and durability standards required in various industrial applications. It’s a fundamental responsibility that directly influences the performance and longevity of the refractory materials used.

While other tasks like submitting warranty claims, training the owner’s staff, and providing transport for materials may be associated with a contractor's responsibilities, they are not specific to the actual installation work itself. Execution of installation is a pivotal duty that forms the basis for the effectiveness of the overall project.