FIRE PROTECTION SYSTEMS

Question 1

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

Answer 1

cockpit and/or cabin

Question 2

What occurs when a visual smoke detector is activated?

Answer 2

a lamp within the indicator illuminates automatically

Question 3

The types of fire-extinguishing agents for aircraft interior fires are

Answer 3

water, carbon dioxide, dry chemical and halogenated hydrocarbons

Question 4

When air samples contain carbon monoxide, portable carbon monoxide detectors containing yellow silica gel will turn which color?

Answer 4

green

Question 5

Smoke detection instruments are classified by their method of

Answer 5

detection

Question 6

Smoke detectors which use a measurement of light transmissibility in the air are called

Answer 6

photoelectrical devices

Question 7

A contaminated carbon monoxide portable test unit would be returned to service by

Answer 7

installing a new indicating element

Question 8

Which fire-detection system measures temperature rise compared to a reference temperature?

Answer 8

thermocouple

Question 9

A carbon dioxide (CO(2)) hand-held fire extinguisher may be used on an electrical fire if the

Answer 9

horn is nonmetallic

Question 10

The proper fire-extinguishing agent to use on an aircraft brake fire is

Answer 10

dry powder chemical

Question 11

Smoke in the cargo and/or baggage compartment of an aircraft is commonly detected by which instrument?

Answer 11

photoelectric cell

Question 12

Light refraction smoke detectors are activated when the detector

Answer 12

senses light reflected from smoke particles passing through a chamber

Question 13

Why does the Fenwal fire-detection system use spot detectors wired parallel between two separate circuits?

Answer 13

a short may exist in either circuit without causing a false fire warning

Question 14

A fire-extinguisher container can be checked to determine its charge by

Answer 14

weighing the container and its contents

Question 15

What is the color code for fire-extinguisher lines?

Answer 15

brown

Question 16

The most common cause of false fire warnings in continuous-loop fire-detection systems is

Answer 16

dent kinks or crushed sensor sections

Question 17

A thermocouple in a fire-detection system causes the warning system to operate because

Answer 17

it generates a small current when heated

Question 18

The thermocouple fire-warning system is activated by a

Answer 18

rate of temperature rise

Question 19

When used in fire-detection systems having a single indicator light, thermal switches are wired in

Answer 19

parallel with each other and in series with the light

Question 20

Built-in aircraft fire-extinguishing systems are ordinarily charged with

Answer 20

halogenated hydrocarbons and nitrogen

Question 21

In reference to aircraft fire-extinguishing systems,
(1) during removal or installation, the terminals of discharge cartridges should be grounded or shorted.
(2) before connecting cartridge terminals to the electrical system, the system should be checked with a
voltmeter to see that no voltage exists at the terminal connections.
Regarding the above statements,

Answer 21

both no. 1 and no. 2 are true

Question 22

What method is used to detect the thermal discharge of a built-in fire-extinguisher system?

Answer 22

a rupture of the red plastic disk in the thermal discharge line

Question 23

The thermal switches of a bimetallic thermal-switch type fire-detection (single-loop) system are heat- sensitive units that complete circuits at a certain temperature. They are connected in

Answer 23

parallel with each other, but in series with the indicator lights

Question 24

On a periodic check of fire-extinguisher containers, the pressure was not between minimum and maximum limits. What procedure should be followed?

Answer 24

replace the extinguisher container

Question 25

In some fire-extinguishing systems, evidence that the system has been intentionally discharged is indicated by the absence of

Answer 25

yellow disk on the side of the fuselage

Question 26

If a fire extinguisher cartridge is removed from a discharge valve, it should be

Answer 26

used only on the original discharge valve assembly

Question 27

Which of the following are fire precautions which must be observed when working on an oxygen
system?
1. Display ‘No Smoking’ placards.
2. Provide adequate fire-fighting equipment.
3. Keep all tools and oxygen servicing equipment free from oil or grease.
4. Avoid checking aircraft radio or electrical systems.

Answer 27

1,2,3,4

Question 28

Which fire-extinguishing agent is considered to be the least toxic?

Answer 28

. bromotriflouromethane (Halon 1301)

Question 29

Maintenance of fire-detection systems includes the

Answer 29

replacement of damaged sensing elements

Question 30

(Refer to Figure 21.) Using the chart, determine the temperature range for a fire-extinguishing agent
storage container with a pressure of 330 PSIG. (Consider 330 PSIG for both minimum and maximum
pressure.)

Answer 30

45 to 75 degree F