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AMT1214
Fire Protection
Question | Answer |
---|---|
Where would a carbon monoxide detector be located in an aircraft? | Cockpit and/or cabin |
A carbon dioxide hand-held fire extinguisher may be used on what type of fire if the horn is nonmetallic | Electrical |
If a fire extinguisher is found out of limits, what must be done? | Replace the container |
What do photoelectrical devices measure in reference to smoke detection? | light transmissibility |
What does the absence of a yellow disk on the side of the fuselage indicate? | the system has been intentionally discharged |
A device to release fire-extinguishing agent is called what? | A squib |
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 | parallel with each other, but in series with the indicator lights |
What happens when a visual smoke detector is activated? | A lamp within the indicator illuminates automatically |
Fire zones are based off what? | The volume and smoothness of the airflow through the engine compartments |
Electrical fires are extinguished with what agent? | Carbon dioxide |
Which system measures temperature rise? | Thermocouple |
Interior fires are extinguished using what agents? | Water, carbon dioxide, dry chemical, and halogenated |
Spot detector sensor fire detection system operates how? | Bimetallic thermoswitch that closes when heated to a high temperature |
What are built-in fire-extinguishing systems usually charged with? | Halogenated hydrocarbons and nitrogen |
What happens when the detector senses light reflected from smoke particles passing through a chamber? | Light refraction smoke detector activates |
What component is a life-dated unit in a fire detection system? | The explosive cartridge in the discharge valve of a fire extinguisher |
What is a class B fire? | fuel or oil |
Dents and kinks and crushed sensor sections are common causes of what? | False fire warnings in a continuous-loop fire-detection system |
How are most aircraft turbine engine fire-extinguishing systems activated? | Electrically discharged cartridges |
After a fire is extinguished, or overheat condition removed in aircraft equipped with a Systron-Donner fire detector, the detection system | Automatically resets |
What are the four safety precautions to follow when working with oxygen equipment? | Display 'No Smoking' placards, provide adequate fire-fighting equipment, keep all tools and oxygen servicing equipment free from oil or grease, and avoid checking aircraft radio or electrical systems |
Which agent is the safest to use in reference to toxicity? | Halon 1301 |
pulling out (or down) of an illuminated fire handle in a typical large jet aircraft fire protection system commonly accomplishes what events? | Shuts off fuel, closes hydraulic shutoff, disconnects generator field and arms the fire-extinguishing system |
How do you extinguish a class D fire? | special dry powders |
What are two continuous-loop fire detection systems that will not test due to a broken detector element ? | Kidde and Fenwal systems |
A contaminated carbon monoxide portable test unit would be returned to service by: | Installing a new indicating element |
Smoke in the cargo and/or baggage compartment of an aircraft is commonly detected by which instrument? | Photoelectric cell |
How are smoke detection instruments classified? | Their method of detection |
How are fire-extinguisher containers checked | Weighing the container and its contents |
If a fire-detection system has a single indicator light, how are the thermal switches wired? | Parallel with each other and in series with the light |
What is included with the maintenance of fire-detection systems? | Replacement of damaged sensing elements |
Rate of temperature rise detectors are commonly found where? | The engine nacelle |
Why does one type of Fenwal fire detection system use spot detectors wired in parallel between two separate circuits? | So a single fault may exist without sounding a false alarm |
What is the most satisfactory extinguishing agent for a tailpipe or intake fire? | Carbon dioxide |
What is the principle of operation of the continuous-loop system? | Core resistance material which prevents current flow at normal temperatures |
What system operates on the principle of a buildup of gas pressure? | Lindberg continuous-element |
How does carbon dioxide extinguish an engine fire? | Smothers the flame |
What retains the nitrogen charge agent in a high rate of discharge (HRD) container? | Breakable disk |
A class C fire involves what? | Electrical |
What is the color code for fire extinguisher lines? | Brown |
Which fire detection system that uses a single wire surrounded by a continuous string of ceramic beads in a tube? | Fenwal |
Which fire detection system uses 2 wires imbedded in a ceramic core? | Kidde |