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M11 > 11.8 fire protection > Flashcards

11.8 fire protection Flashcards

1
Q

for a fire to occur what 3 things are required

A

fuel, heat, oxygen

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2
Q

what is a fire zone

A

area of aircraft that requires detection or extinguishing systems

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3
Q

what are some of the fire detection methods used on aircraft

A

overheat detector, rate of temp rise detector, flame detector, crew observation

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4
Q

where are overheat warnings used

A

areas of high temperature

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5
Q

what are the 3 most common fire detectors

A

thermal switches, thermocouples, continuous loop sensing

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6
Q

when the heat rises what does a thermal switch do

A

thermal switch closes

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7
Q

how does a thermocouple work

A

measures rate of temperature change

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8
Q

what is a thermocouple constructed out of

A

two dis-similar metals

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9
Q

what fire detection method do most modern aircraft have

A

continuous loop

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10
Q

what are the 2 widely used continuous loop detectors

A

thermistor, pneumatic pressure

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11
Q

what is the tube made of in a fenwal system

A

inconel

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12
Q

what are the 2 continuous loop systems

A

fenwal, kidde

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13
Q

does a kidde system have 2 or 1 conductor running through it

A

2

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14
Q

does a fenwal system have 1 or 2 conductors running through it

A

1

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15
Q

what principle does the pneumatic continuous loop work on

A

gasses that expand under heat

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16
Q

what are the 2 pneumatic continuous loop sensing functions

A

overall overage temp, localised temp increase

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17
Q

are the 2 pneumatic sensing functions factory or changeable

A

factory

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18
Q

what are the 2 basic smoke detection systems

A

photoelectric, ionisation

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19
Q

what are the 2 subsystems of photoelectric smoke detection systems

A

comparison, refraction

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20
Q

briefly describe the photoelectric smoke detector

A

light reflects and when the reflecting isn’t read on the opposite sensor it alerts the flight deck

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21
Q

when are lavatory smoke detectors required

A

20 or more passengers

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22
Q

what is the lavatory smoke detector powered with

A

28 V DC

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23
Q

what colour does the lavatory smoke detector go when it detects smoke and when does it go out

A

red and goes out when no smoke is present

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24
Q

what designated zones have fixed fire detection/extinguishing

A

engines, APU, cargo, lavatories

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25
Q

what is the most common extinguishing agent on aircraft

A

halon 1301

26
Q

what are fire extinguishing bottles pressurized with

A

nitrogen

27
Q

what are fire extinguishing bottles made from

A

stainless steel

28
Q

what is on fire extinguishing bottles to automatically release

A

discharge valve, squib, frangible disk

29
Q

what are the 2 types of cartridge disk release methods

A

standard release type, high temp or hermetically sealed units

30
Q

what is used on twin engine aircraft to prevent the extinguishing agent from the second bottle backing up into the previously emptied conatiner

A

two way check valve

31
Q

what do discharge indicators provide

A

visual evidence of bottle discharge

32
Q

what are the 2 common types of indicators used for discharge and there colours

A

thermal discharge (red), discharge indicator (yellow

33
Q

what colour is the thermal discharge indicator

A

red

34
Q

what colour is the discharge indicator

A

yellow

35
Q

what shot system must a engine extinguishing system be

A

two shot

36
Q

what colour discharge light illuminates when the bottle is empty

A

amber

37
Q

after how long must you wait until discharging the second extinguishing bottle

A

30 seconds

38
Q

does the APU have its own individual fire extinguishing system

A

yes

39
Q

the service life of bottle discharge cartridges is usually in what range

A

5-10 years

40
Q

what is HIRF

A

high intensity radiated fields

41
Q

before installing any pipes or tubing on extinguishing equipment what must you check

A

no obstructions

42
Q

is the cargo fire extinguishing automatic or manual

A

manual by flight crew

43
Q

theres 2 stages if the cargo extinguisher is deployed, what are they

A

dump to put fire out, slow release over 180 minutes to keep fire out

44
Q

when does the lavatory waste compartment deploy its extinguisher

A

reaches approximately 170 degrees celcius

45
Q

can the lavatory bin extinguisher be refilled

A

no, it has to be replaced

46
Q

what do aviation regulations state on handheld fire extinguishers in the cockpit

A

at least one in reaching distance

47
Q

when must there be a hand held fire extinguisher in the cabin

A

more than 6 and less than 30 passengers

48
Q

name the number of passengers and how many handheld fire extinguishers are required

A

7-30 (1)
31-60 (2)
61-200 (3)
201-300 (4)
301-400 (5)
401-500 (6)
501-600 (7)
601 + (8)

49
Q

what are the advantages of halon extinguisher

A

clean agent, non-conductive, low toxicity

50
Q

what are the 2 types of halon in aviation

A

halon 1301, halon 1211

51
Q

what class fires can be controlled with halon

A

A, B, C

52
Q

where are CO2 extinguishers usually used

A

external aircraft

53
Q

what fires can dry powders be used on

A

A, B, C

54
Q

what fire do water extinguishers best fight

A

A

55
Q

whats a class A compartment

A

visual smoke detection, accessible in flight, fire extinguisher available

56
Q

whats a class B compartment

A

sufficient access in flight, hand fire extinguishers, separate smoke detector

57
Q

whats a class C compartment

A

separate smoke/fire detectors, built in extinguishing, ventilation

58
Q

whats a class D compartment

A

no longer used, converted to class E

59
Q

whats a class e compartment

A

smoke detector, shut off ventilation

60
Q
A

M11 (15 decks)

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