Airframe Systems and Components (Fire Protection)

Question 1

In what area of an aircraft would you find a carbon monoxide detector?

Answer 1

In cabins and cockpits, they are placed where they are easily visible

Question 2

what color does a carbon monoxide detector change to when carbon monoxide fumes are present?

Answer 2

silica turns from yellow to a shade of green , other types change from tan to gray to black

Question 3

what are two types of smoke detectors?

Answer 3

Visual and photoelectric

Question 4

where are smoke detectors used in the aircraft?

Answer 4

Cargo and baggage compartment, and the lavatory

Question 5

how are thermal switch is wired in thermal switch fire detection system?

Answer 5

Switches are wired in parallel with each other but in series with a warning lights

Question 6

describe operating principle of thermal switch fire detection system?

Answer 6

Thermal switches are heat sensitive unisex complete the circuit at a certain temperature.

Question 7

describe operating principle of a continuous loop fire detection system.

Answer 7

Continuous loop consist of one or more wires embedded in a ceramic core inside of a conductor too. In case of fire or overheat, the ceramic cores resistance drops, allowing current to flow between the signal wire and conductive tube, lighting a warning light.

Question 8

how does a thermocouple fire detection system different from a thermal switch?

Answer 8

A thermocouple depends upon the rate of rise temperature and will not give a warning when engine overheats slowly or a short circuit develops

Question 9

what are the two types of fire extinguishing systems?

Answer 9

Conventional and HRD (High rate of discharge)

Question 10

what type extinguishing agent is usually found in an HRD system?

Answer 10

Halon 1301 is the most common

Question 11

what type extinguishing agent is usually associated with a conventional type extinguishing system?

Answer 11

CO2

Question 12

what is the purpose of the yellow desk in a CO2 fire extinguishing system?

Answer 12

it indicates which bank of bottles has been empty through normal discharge.

Question 13

how can you determine the charge of CO2 extinguisher?

Answer 13

by weighing it

Question 14

in a turbine engine Freon (halon) on fire extinguishing system how are bottles discharge?

Answer 14

squib is detonated electrically breaking frangible disk

Question 15

how is a Freon fire extinguishing system protected from temperature rises in excess of set limits?

Answer 15

System is equipped with a thermal fuse that will melt at high temperature conditions and will blow the red discharge indicator disc.

Question 16

What type of extinguisher is recommended for brake fires?

Answer 16

Dry powder extinguisher

Question 17

how does ambient temperature affect the pressure reading on a fire extinguisher?

Answer 17

pressure follows temp

Low temperature will decrease absolute pressure

High Temperature will increase absolute pressure

Question 18

how can you determine the service life of fire extinguisher discharge cartridge?

Answer 18

By the manufacturers date stamped on the face of the cartridge

Question 19

what type of handheld fire extinguishers are available for extinguishing into your aircraft buyers?

Answer 19

Dry chemical extinguishing agent, water, carbon dioxide what is the purpose

Question 20

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

Answer 20

continuous loop detector system

Question 21

Name the classes of fires.

Answer 21

A combustible materials
B combustible liquids
C Electrical fires
D metal fires

Question 22

how does a photoelectric smoke detector work?

Answer 22

Smoke particulates block the photoelectric receptor from sensing light.