Demonstration should include

identifying all applicable PPE
explaining the principles, language, and theory of small engines
explaining the safety measures and procedures that should be followed and the PPE that should be used when repairing small engines
using tools and equipment related to small engines, using all safety procedures and following industry recommended practices and instructor guidelines

completing an approved small-engine project (e.g., troubleshooting, maintaining, servicing), using all safety procedures and following industry recommended practices and instructor guidelines.