Thursday Nov 29 2012 comments Sierra College fuses math and welding By: Anne Stokes, Placer Herald -A +A Buy This Photo Now Instructor Bill Wenzel does a demonstration for his Weld Tech 10 class (exploring metals and introduction to gas welding) at Sierra College. Student Naz Diakun of Roseville works out how to construct a hibachi grill, a class project for his Weld Tech 10 (exploring metals and introduction to gas welding) at Sierra College. Welding instructor Bill Wenzel, left, shows students James Vance of Roseville and Marcelo Portillo of Orangevale how to safely use a hydraulic hole punch during class at Sierra College. Alex Anderson of Roseville welds a portion of hiswelding class project- a hibachi grill- during class at Sierra College. Instructor Bill Wenzel demonstrates MIG (metal inert gas) welding during his Weld Tech 10 class at Sierra College. Instructor Bill Wenzel inspects a student's work during his Weld Tech 10- exploring metals and introduction to gas welding at Sierra College.