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1. C12 - Dry chemical extinguishing agents are effective when used ___________.


2. Foam extinguishes fire by_____.


3. How does foam extinguish an oil fire?


4. Except in rare cases, it is impossible to extinguish a shipboard fire by __________.


5. If a firefighting situation calls for low-velocity fog you would __________.


6. The total available supply of CO2 for use in a fixed extinguishing system of a cargo vessel shall be at least sufficient for_________________.


7. A definite advantage of using water as a fire extinguishing agent is its characteristic of __________.


8. Chemical foam is most suitable for use on a fire involving _____________.


9. A galley grease fire would be classified as .


10. Which of the following classes of fire would probably occur in the engine room bilges?


11. The function of the bypass valve on the self-contained breathing apparatus is to __________.


12. A class "D" fire would involve the burning of__________.


13. Through which of the listed process is sufficient heat produced to cause spontaneous ignition?


14. What is required in addition to the heat, fuel, and oxygen of the fire triangle to have a fire?


15. What is the function of the bypass valve on the self-contained breathing apparatus?


16. You are fighting a fire in the electrical switchboard in the engine room. You should secure the power, then __________.


17. C12 - A fire is considered 'under control' when_________.


18. C12 - At the required fire drill, all persons must report to their stations and demonstrate their ability to perform duties assigned to them ________.


19. C12 - You are underway when a fire breaks out in the forward part of your vessel. If possible you should __________.


20. C12 - A burning AC motor would be considered what class of fire?


21. C12 - A burning mattress is considered as which of the following classes of fire?


22. C12 - A fire in a pile of dunnage would be classified as a_______.


23. C12 - In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by_______.


24. C12 - Extinguishing oil fire is very effective when__________.


25. C12 - A class


26. C12 - Fuel vents are fitted with corrosion resistant screen to prevent________.


27. C12 - Which fire extinguishing agent has the greatest capacity for absorbing heat?


28. C12 - When is the best time to vent the combustible products from the engine room after CO2 fire extinguishing system has released?


29. C12 - Annual servicing of a hand portable CO2 fire extinguisher includes_____________ .


30. C12 - A class


31. C12 - On an inspection of your tankship you notice that there are no portable fire extinguishers in the pumproom. To comply with regulations, you __________.


32. C12 - All of the following are part of the fire triangle EXCEPT __________.


33. C12 - Fire alarm system thermostats are actuated by_________.


34. C12 - The supply of carbon dioxide used in a fixed extinguishing system aboard a cargo vessel MUST be at least sufficient for __________.


35. C12 - Valves on steam-smothering lines to cargo tanks shall be set with __________.


36. C12 - A fire can spread by


37. C12 - You are fighting a class


38. C12 - When two fire hose teams are attacking a fire they should __________.


39. C12 - The smoke detector (fire indicator) indicates fire in a cargo hold loaded by general cargo. What first action should be taken?


40. C12 - Which extinguishing agent is most likely to allow reflash as a result of not cooling the fuel below its ignition temperature?


41. C12 - Combustible gas indicator is operated by drawing an air sample into the instrument_______.


42. C12 - By definition, spontaneous combustible is a result of_________.


43. C12 - When using mechanical foam to fight a bilge fire, the stream of foam is most effective when directed ___________.


44. C12 - One of the limitations of foam as a fire extinguishing agent is that foam ________.


45. C12 - The piece of equipment shown in the illustration is used in conjunction with a fire hose to produce which of the listed fire extinguishing agents?


46. C12 - Which of the following fire extinguishing agents is best suited for use on a large class


47. C12 - Foam extinguishes a fire by __________.


48. C12 - The use of which type of fire extinguishing agent involves covering the burning surface by deflecting the agent from a bulkhead to avoid undue agitation?


49. C12 - The best way to combat an engine room bilge fire is through the use of a _____________.


50. C12 - Which of the following would be considered a Class “B” fire?


51. C12 - The most important characteristic of a fire extinguishing agent to be used on electrical fires is for the agent to be ___________.


52. C12 - An extinguishing agent which effectively cools, dilutes combustible vapors and provides a heat and smoke screen is ___________.


53. C12 - When approaching a fire from winward, you should shield firefighters from the fire by using _____________.


54. C12 - Which statement is FALSE regarding Halon as a fire extinguishing agent?


55. C12 - Which of the following statements concerning chemical foam is TRUE?


56. C12 - A fire extinguishing product produced by first mixing a foam concentrate with water to produce a foam solution, then mixing the foam solution with air is termed ____________.


57. C12 - When an electrical fire has been extinguished with a dry chemical agent, there is always a possibility of the __________.


58. C12 - Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the ________.


59. C12 - In which of the circumstances listed would a carbon dioxide fire extinguishing agent be most effective?


60. C12 - Spontaneous combustion is most likely to occur in _______.


61. C12 - Firefighting foam is only effective when the foam ___________.


62. C12 - The advantage of using a dry chemical fire extinguishing agent is _________.


63. C12 - Dry chemical extinguishing agents extinguish a fire by _________.


64. C12 - What danger to personnel exists when a carbon dioxide fire extinguisher is discharged in a small enclosed space?


65. C12 - Mechanically foam used for firefighting is produced by mechanically mixing and agitating ___________.


66. C12 - One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is ____________.


67. C12 - If flammable liquids are being pumped with a centrifugal pump, you should_______.


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