Fire Protection Systems

Question 1

1. In what area of an aircraft would you find carbon monoxide detectors?

Answer 1

Cockpits & cabin

Question 2

2. What color does a CO detector change to when carbon monoxide fumes are present?

Answer 2

Green, gray, or black

Question 3

3. What are two types of smoke detectors?

Answer 3

Photoelectric & visual

Question 4

4. Where are smoke detectors use in aircraft?

Answer 4

Baggage compartment & lavatory

Question 5

5. How are thermal switches wired in thermal switch fire detection system?

Answer 5

Parallel with each other & in series with warning lights

Question 6

6. Describe the operating principle of a thermal switch fire detection system.

Answer 6

One or more lights, thermal switch when hits a certain temp illuminates the lights

Question 7

7. Describe the operating principle of a continuous loop fire detection system.

Answer 7

One or more wires imbedded in ceramic core inside conductive tube. When heats up it ceramic core is less resistant allowing current though illuminating the light

Question 8

8. How does a thermocouple fire detection system differ from the thermal switch system?

Answer 8

Thermocouple depends on rate of temperature rise

Question 9

9. What are two types of fire extinguishing systems?

Answer 9

High rate discharge system uses Halon
Conventional fire system use carbon dioxide

Question 10

10. What type extinguishing agent is usually found in a high rate discharge system?

Answer 10

Halon

Question 11

11. What type extinguishing agent is usually associated with a conventional type extinguishing system?

Answer 11

CO2

Question 12

12. What is the purpose of the yellow disc in CO2 fire extinguishing system?

Answer 12

Indicates which bottle has been discharged

Question 13

13. How can you determine the charge of a CO2 extinguisher?

Answer 13

Weight it

Question 14

14. In a turbine engine Freon (halon) fire extinguishing system, how are bottles discharged?

Answer 14

Explosive discharge cartridge detonated electrically, breaking a disc

Question 15

15. How is a Freon (halon) fire extinguishing system protected from temperature rises more than set limits?

Answer 15

Equipped with thermal fuse, once melted it discharges

Question 16

16. How does ambient temperature affect the pressure reading on a fire extinguisher?

Answer 16

Low temps - decrease absolute pressure
High temps- increase absolute pressure

Question 17

17. What type of extinguisher is recommended for brake lines?

Answer 17

Dry powder

Question 18

18. How can you determine the service life of a fire extinguisher discharge cartridge?

Answer 18

Manufactures date on cartridge, service life hours below a predetermined temperature

Question 19

19. What type of hand held fire extinguishers are available of or extinguishing interior aircraft fires?

Answer 19

Water
CO2
Dry chemical

Question 20

20. What type of fire detection system gives a more complete coverage of a fire hazard?

Answer 20

Continuous loop detector system

Question 21

21. Name the different class of fires.

Answer 21

A- combustible materials
B- combustible liquids
C- Eletrical
D- Metal

Question 22

22. How does a photoelectric smoke detector work?

Answer 22

Smoke particles block receptor from light

Question 23

23. How would you determine when the next hydrostatic test is due on a portable fire bottle?

Answer 23

DOT information on bottle, 5 years from last date