| A MODU must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement, you may use __________. |
| A) an oxygen breathing apparatus, provided that the device has been inspected within three years |
| B) a gas mask certified by the Mine Safety and Health Administration |
| C) a portable ventilation system that will provide a complete change of air every three minutes |
| D) the same self-contained breathing apparatus required with the fireman's outfit |
