------------- Secondary (high) school graduation certificate
Tasks
--------- Prepare, measure and mark surfaces to be covered
Mix, apply and spread mortar, cement, mastic, glue or other adhesives using hand trowel
Remove and replace cracked or damaged tiles
Supervise other workers
Build underbeds and install anchor bolts, wires and brackets
Cut, surface, polish and install marble and granite
Estimate costs and materials
Operate heavy equipment