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Systems COPY COPY > Fire Extinguishing > Flashcards

Fire Extinguishing Flashcards

1
Q

How many fire detectors do the engines have and where are they located?

A

4 total
2 in each engine pylon
2 in each engine accessories compartment

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2
Q

What is the engine fire detection system made of?

A

Helium filled tube with a hydrogen core.

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3
Q

How does the tube detect a fire?

A

Heat causes helium to expand and trip a pressure switch.

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4
Q

How is the fire tube integrity monitored?

A

Internal pressure keeps and integrity switch open.

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5
Q

What powers the fire detection systems for the engines and APU?

A

Essential bus 1 - engine 1

Essential bus 2 - engine 2, APU

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6
Q

How is fire detected in the APU?

A

A single fire and overheat detection system.

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7
Q

When will the APU shut down automatically with a fire detected?

A

When it is on the ground.

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8
Q

How many extinguishing bottles does the engine and APU have? Where are they located?

A

2 for the engines
1 for APU
In the tail cone

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9
Q

How much do the fire bottles hold?

A

5lbs for engines
1lb for APU

600psi

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10
Q

How is the fire extinguishing bottle discharged?

A

Electrically actuated cartridge fires a slug to break the seal.

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11
Q

What bottles are connected to which engine?

A

Both bottles are connected to both engines.

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12
Q

How are the extinguishing bottles powered?

A

Bottle A hot battery bus 1
Bottle B hot battery bus 2
APU bottle essential bus 2

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13
Q

How is the lavatory fire bottle discharged?

A

Temperature sensitive head melts?

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14
Q

How many baggage compartment smoke detectors are there and where?

A

2 in the ceiling.

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15
Q

How is fire extinguished in the baggage compartment?

A

1 high rate discharge bottle

1 metering discharge bottle

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16
Q

How long can the metering discharge bottle continue releasing extinguishing agent?

A

50 minutes

17
Q

What class baggage compartment does the emb 145 have?

A

Class c

18
Q

What happens when fire is detected in the baggage compartment?

A

The fan shuts down and the baggage extinguishing button illuminates.

19
Q

What shutoff valves close when you pull the fuel handle?

A

Fuel
hydraulic
Bleed air
Engine anti ice

20
Q

What are you looking for in the fire test?

A 
Fire bell 
Master warning and caution lights 
T handle lights
Baggage extinguisher light
3 warning 2 caution EICAS message
21
Q

How much time must elapse between fire tests?

A

6 seconds

22
Q

What will make the baggage extinguishing button illuminate?

A

Smoke detection

Recirculating fan stoppage

23
Q

What does the lavatory fire detection system consist of?

A

Smoke detector

Waste basket fire extinguishing bottle.

Systems COPY COPY (23 decks)

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