6-Manufacturing processes are classified mainly as the following operations: a) Shaping and heat treatment. b) Surface processing and property enhancement c) Processing and assembly. d) Welding and adhesive bonding. 7-Depending on composition, the typical pouring temperature of cast iron is about: a) 1200C. b) 1400C. c) 1600C. d) 1800C. 8-Oxy-fuel gas welding uses an oxy-fuel gas, which is a mixture of: a) Acetylene and argon. b) Oxygen and hydrogen. c) Oxygen and acetylene. d) Nitrogen and helium. 9-Lap joint consists of: a) The parts lie in the same plane and are joined at their edges. b) One part is perpendicular to the other. c) Two overlapping parts. d) Three overlapping parts. 10- In commercial practice, tolerances for small castings are usually in the range of: a) 0.8 mm. b) + 1 mm. c) + 2 mm. d) + 3 mm