Fire Protection

Question 1

If 1 loop is fault and the other triggers an alarm, can we still have an output of alarm,
T or F?

Answer 1

TRUE

Question 2

If loop A is healthy and didn’t triggered an alarm but the Loop B triggers an alarm, what does it mean?

Answer 2

There’s a Fault

Question 3

What kind of Fire detection system is used
in Engine and APU?

Answer 3

Continuous Dual Loops

Question 4

How does the Pneumatic Pressure Loop operate?

Answer 4

When Temperature increase, the pressure will also increase. There’s a Pressure Switch in the responder which is in
the thicker end of the loop. The closed switch triggers the alarm via the control unit.

Question 5

How does the Semiconductor Loop operate?

Answer 5

Each loop has a metal tube, its electrical resistance decreases as the temperature
increases. The resistance between the central
wire and tube decreases below the threshold, the alarm is triggered.

Question 6

The APU and Engine Fire detection system activates the same, so what differs the APU from the Engine?

Answer 6

One feature is a ground warning in the nose or main wheel well area (Red flashes and a warning horn sounds) Second, it also automatically shut down and
on some aircraft types it also automatically extinguished

Question 7

What kind of sensor is used in Wheel Well Area?

Answer 7

Semiconductor loop (Single continous loop)

Question 8

Fire detection used in the Cargo Compartment?

Answer 8

Dual Sensor Smoke Detectors

Question 9

What are the conditions to operate the Dual
Smoke Detectors?

Answer 9

(1 Fail) + (1 Alarm) = The output will alarm but using OR Gate

(2 Alarms/ they are both healthy) = The output will alarm by using AND Gate

Question 10

ENG Fire Indicators?

Answer 10

Local Fire Warning =
-Fire P/B S/W,
-MASTER Control S/W – ENG

Central Warning =
-Master Warning Light,
-Aural Warning/CRC,
-ECAM/EICAS Display Red Message

Question 11

What will happen when we press MASTER
Warning Light P/B S/W?

Answer 11

The Central Warning is cancelled when
you press the P/B S/W

Question 12

Each Lavatory smoke detection has?

Answer 12

A single sensor in the lavatory ceiling area

Question 13

How do you cancel the aural warnings in Lavatories?

Answer 13

By pushing the RESET Button

Question 14

) What are the Parts of Fire and Overheat Detection Systems?

Answer 14

First – Sensor, Second – Control Unit, Third – Panels for the warnings

Question 15

Three main components of a basic fire extinguishing system?

Answer 15

Extinguisher Bottle, Discharged Head w/ cartridge (squib), Piping w/ spray nozzle

Question 16

If there is smoke from the avionics compartment where will it go?

Answer 16

in the equipment cooling duct outlet

Question 17

If the APU is on fire and the cockpit is empty what are the features?

Answer 17

A red light flashes and a warning horn sounds

Question 18

the cargo smoke detection system has?

Answer 18

Smoke detectors, Control unit and cargo fire control panel

Question 19

When smoke is detected in the lavatory, where can you see warnings?

Answer 19

In the passenger cabin near the flight attendat seat and on the purser panel. The pilots are also informed by a central warning on ECAM or EICAS

Question 20

If loop A is healthy and didn’t triggered
an alarm but the Loop B triggers an alarm, What does it mean?

Answer 20

There’s a Fault

Question 21

The APU and Engine Fire detection system activates the same, so what differs the APU from the Engine?

Answer 21

One feature is a ground warning in the nose or main wheel well area (Red flashes and a warning horn sounds) Second, it also automatically shut down and on some aircraft types it also automatically extinguished

Question 22

ENG Fire Indicators?

Answer 22

-Local Fire Warning = Fire P/B S/W, -MASTER Control S/W – ENG Central Warning = Master Warning Light, -Aural Warning/CRC,
-ECAM/EICAS Display Red Message

Question 23

What will happen when we press MASTER Warning Light P/B S/W?

Answer 23

The Central Warning is cancelled when you press the P/B S/W

Question 24

Fire detection used in the Cargo Compartment?

Answer 24

Dual Sensor Smoke Detectors

Question 25

Each Lavatory smoke detection has?

Answer 25

Single Sensor Smoke Detectors

Question 26

Sensor used for pneumatic duct leak detection

Answer 26

Spot sensor