According to Walmart FAQs, the protection plan of general merchandise covers only products used primarily for personal, family, or household purposes. Walmart Protection Plan will cover a mechanical or electrical failure of the covered products. The plan also covers
damage due to seam separation;
broken hardware and pulls;
seam separation of joints and welds;
cracks;
peeling of veneers;
broken hinges, casters, slides, drawer pull/guides or swivels;
damaged mechanical elements etc.
You may read the full information at Walmart's terms of use.