Chapter 12

1. Which fire suppression system uses a very fine spray that controls or extinguishes fire by displacing oxygen and blocking radiant heat production?

2. Which of the following statements about sprinkler systems and a water supply is MOST accurate?

3. Which type of sprinkler is designed to rapidly suppress fires in high-challenge hazards such as warehouses?

4. The pipe schedule table method is limited to:

5. Which type of sprinkler is installed downward from the branch line so that water flowing from the sprinkler strikes the deflector and is distributed over the protected area?

6. Which method allows for calculations to be made to protect all types of hazards, including extra hazards, with any type of piping and any type of sprinkler discharge device?

7. Water-mist fire suppression systems are designed to be operated at:

8. Which type of valve is a gate valve that has a yoke on the outside with a threaded stem or screw?

9. Thermally sensitive devices such as fusible links keep most sprinklers closed and when heat from a fire affects these devices:

10. Which type of sprinkler is recessed and covered with a removable decorative cover plate that releases when exposed to a specific level of heat?

11. Which sprinkler system device activates preaction and deluge systems by smoke, heat, or rate-of-rise detectors in the protected area?

12. Which type of sprinkler is designed to provide increased life safety in hotels, motels, and similar residential occupancies?

13. Which type of sprinkler system operates when an electronic detector or manual control device is activated?

14. Unless otherwise approved, spacing for sprinklers in residential systems is a:

15. Which automatic sprinkler system is continually charged with compressed air and when a sprinkler activates, the air is released, allowing the water-flow control valve to operate and charge the system with water?

16. Which valve is used to drain water from piping when pressure is relieved in the pipe?

17. Which detection and activation device sounds a warning when a sprinkler activates and water begins to flow?

18. Which type of sprinkler is designed for fast response in residential occupancies where life safety in the room of origin is the primary concern?

19. Which automatic sprinkler system is continually charged with water under pressure that discharges immediately when heat from a fire activates one or more sprinklers?

20. Which automatic sprinkler system has the advantage of water flowing to the sprinklers from multiple directions?

21. Which of the following are used to turn off or isolate the water supply to the system when it is necessary to perform maintenance, change sprinklers, or interrupt operation?

22. Which type of valve is an underground gate valve that has a hollow metal post attached to the valve housing?

23. Fire loss data reveals that in buildings equipped with automatic sprinklers, about _______ percent of all fires were controlled or extinguished by the sprinkler system.

24. Which valve is usually a globe valve and may sometimes be found at a remote location within a sprinkler system?

25. While maintaining a minimum required residual pressure in the system, a water supply must be able to deliver the required volume of water to:

26. Which automatic sprinkler system consists of open sprinklers attached to unpressurized dry pipes?

27. Which type of sprinkler is installed upward from a line so that water is discharged up against the deflector?

28. Which type of sprinkler is mounted in a ceiling with the body of the sprinkler, including the threaded shank, above the plane of the ceiling?

29. The maximum spacing between sprinklers in residential systems is:

30. Which fire suppression system provides protection to specific hazards by applying water droplets of a predetermined pattern, particle size, velocity, and density through specially designed nozzles?