21. What is the purpose of a pre-commencement site inspection? Your answer 22. What will you need to check when conducting a pre-commencement site inspection? Your answer 23. What are footing systems and what should you consider when choosing one for a construction project? Your answer 24. List seven different footing systems. Your answer 25. List and briefly explain the four basic types of soil. Your answer 26. How are soils classified, and what class are rock and sand sites? Your answer 27. Explain what damp proof coursing is and how it works. Your answer 28. What are termites and how can you protect against them? Your answer 29. List six termite-resistant materials. Your answer 30. What will you need to consider when constructing a floor system? Your answer 31. List five structural floor systems. Your answer 32. What are the different types of concrete slab construction? Briefly, describe each one. Your answer 33. Explain what structural wall systems and wall cladding systems are. Your answer 34. List four structural wall systems. Your answer 35. List five wall cladding systems. Your answer 36. Explain the performance characteristics and structural capability of cladding. Your answer 37. List six relevant services that will need to be installed in a building or construction project. Your answer 38. Explain what procedures should be followed when having plumbing and electrical services installed in a building. Your answer 39. What will you need to consider when installing windows and external doors in a commercial building? Your answer 40. What are window frames made of? Your answer 41. List the most common opening methods for windows. Your answer 42. What is a structural roof system and what should you consider when constructing one? Your answer 43. List and briefly describe five various roof styles. Your answer 44. Explain what roof cladding is. Your answer 45. List three different roof cladding systems. Your answer 46. Explain what skylights are and list the three different types. Provide a brief description of each one. Your answer 47. What quality procedures should be put in place when constructing roof systems? Your