3-36. What is the main purpose of using felt paper on a built-up roof? 1. To  hold  the  bitumens  together 2. To  insulate 3. To soak up excess asphalt 4. To act as a vapor barrier 3-37. Asphalt should be in what temperature  range  when  applied? 1. 275°F to 375°F 2. 375°F to 425°F 3. 450°F to 500°F 4. 500°F to 550°F 3-38. The aggregate on a built-up roof serves which of the following functions? 1. Protect  the  bitumen  from sunlight  only 2. Increase wind and fire resistance  only 3. Permit use of a thick surface coating of bitumen only 4. Each of the above 3-39. The first two layers of a five-ply roof are referred to as what type of nailer? 1. Dry 2. Base 3. Bottom 4. Back 3-40. A  kettle  operator  should  perform what task first? 1. Fill the fuel tank 2. Fill the kettle with pieces of asphalt 3. Inspect  the  kettle,  making  sure it is dry inside 4. Light-off  the  kettle 3-41. In a kettle, how should you’ maintain hot binder at an even temperature? 1. Adjust the burner 2. Add material at the same rate as the melted material is drawn off 3. Adjust  the  fuel  pressure 4. Remove  material  faster  than  you add it 3-42. If a kettle catches fire, which of the following is an action you should  take  first? 1. Remove the burner 2. Shut off the fuel 3. Spray water on the kettle 4. Close the lid 3-43. The  distance  maintained  between  the mopper and the felt layer should not exceed 1. 9 ft 2. 7 ft 3. 3 ft 4. 5 ft 3-44. Which  of  the  following  properties is/are  essential  for  wood  siding? 1. Weathers  easily 2. Paints  easily  only 3. Works  easily  only 4. Paints and works easily 3-45. Which  of  the  following  horizontal sidings can be obtained with either shiplap  or  tongue-and-groove  edges? 1. Drop 2. Bevel 3. Dolly  Varden 3-46. In the installation of vertical board  siding,  board  widths  range from 2 to 4 inches. 1. True 2. False 3-47. When  installing  4-  by  8-foot vertical plywood siding, which of the  following  materials  should  you apply to the joints to ensure maximum watertightness? 1. Battens  only 2. Caulking  only 3. Water-repellent   preservative and caulking only 4. Any of the above 15