1-37. What is the background color of the  DOT  hazardous  material shipping  symbols  for  non-flammable gas?^- 1. Red 2. Orange 3. Yellow 4. Green 1-38. You have the authority to relabel properly  labeled  hazardous material. 1. True 2. False 1-39. Which  of  the  following  actions should you take when using hazardous  solvents? 1. Spray  solvents  on  electrical windings only 2. Apply  cleaning  solvents  to heated  elements  only 3. Ensure  there  is  adequate ventilation 4. Place all rags used with the solvents  in  an  open  container outside  of  the  workspace 1-40. Which types of solvents are the safest? 1. Oil-based 2. Petrolatum-based 3. Ammonia-based 4. Water-based 1-41. What should you do before using an aerosol  container? 1. Clear the area of all personnel 2. Read  the  label 3. Point the can away from you and test it 4. Remove  the  label 1-42. Which  of  the  following  information is contained on an MSDS? 1. Ingredients  and  identity information 2. Transportation  data 3. An  emergency  phone  number 4. All of the above 1-43. All  equipment  and  cabinets containing  in-service  PCB capacitors must be marked with a label similar to the one shown in figure 2-3 of the text. 1. True 2. False 1-44. Which of the following is a label used by the Navy on hazardous material? 1. Department  of  Defense Hazardous  Chemical  Warning Label 2. Supply  Corps  Identification Label 3. Department  of  the  Navy Identification  Label 4. Supply  Department  Hazardous Warning Label 1-45. In which section of the Tag-Out Log  will  you  find  DANGER/CAUTION tag-out  record  sheets  that  have been cleared and are no longer in effect? 1. 2 2. 3 3. 4 4. 5 1-46. The instrument log is found in which section of the Tag-Out Log? 1. 1 2. 2 3. 3 4. 4 1-47. DANGER/CAUTION  tag-out  record sheets that are still in effect are kept in which section of the Tag-Out Log? 1. 1 2. 2 3. 3 4. 5 1-48. Which of the following is the greatest  hazard  associated  with working  aloft? 1. The danger of a fall 2. The  dropping  of  objects 3. Radiation  burns 4. Asphyxiation 1-49. An RF burn is the result of RF voltages  passing  through  the  body. 1. True 2. False 1-50. Which of the following is the best basic description of a laser beam? 1. A concentrated beam of infrared  light 2. A concentrated beam of medical X-rays 3. A  concentrated  beam  of  optical radiation 4. A concentrated beam of electricity 4