Chapter 13

1. What percentage of finished foam is water?

2. How are portable fire extinguishers classified?

3. The system used when water alone may not be an effective fire extinguishing agent is a:

4. What is the biggest disadvantage to dry-chemical systems?

5. The stage of foam formation that mixes water with foam liquid concentrate is:

6. Which type of foam system method extinguishes a fire by intervening between the fuel and the fire?

7. What is required for a special-agent extinguishing system to be considered successful?

8. Which fire extinguisher agent is subject to freezing if not kept in a heated area or an antifreeze agent added?

9. Which type of foam fire extinguishing system is wheel mounted and may have a water supply connection capability?

10. Which of the following tasks regarding dry-chemical systems is an Inspector I MOST likely to be required to perform?

11. Which foam proportioner allows for automatic proportioning over a wide range of flows and pressures and does not depend on an external power source?

12. Which class of fire involves energized electrical equipment?

13. The general category of fire extinguishing agents that effectively leaves no residue is a:

14. What is critical to total flooding applications of carbon dioxide (CO2) systems in order for them to be effective?

15. Which type of dry-chemical fixed application method introduces a concentration of agent into a closed area?

16. When rapid fire extinguishment is required and reignition is unlikely:

17. Which fire extinguisher agent extinguishes primarily through a smothering action?

18. Which foam expansion rate is useful as a space-filling agent?

19. Which foam proportioner is the most common type of built-in proportioner installed in mobile fire apparatus?

20. Which type of fire extinguisher stores expellant gas and extinguishing agent in a single chamber?

21. Which type of clean system agent is no longer produced but may still be in service?

22. Clearance between the bottom of the extinguisher and the floor should never be less than:

23. Wet-chemical fire extinguishing agents are delivered to the hazard area in the form of a:

24. The four elements necessary to produce high-quality fire fighting foam include foam concentrate, water, mechanical agitation, and:

25. What is the greatest concern for extinguisher reliability?

26. Which foam expansion rate is used primarily to extinguish fires involving liquid fuels?

27. How are special-agent fire extinguishing systems classified?

28. The special-agent fire extinguishing system most effective on fires in commercial cooking equipment that produces grease-laden vapors is a:

29. Which type of dry powder agent is sodium chloride (salt) based?

30. Which dry-chemical system component releases agent into the piping system?