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Engine Fire Protection Systems

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vomizaco's version from 2017-04-26 07:48

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Question Answer
Two continuous-loop fire detection systems that will not test due to a broken detector element are theThe Kidde and the Fenwal fire detection systems
A fire detection system operates on the principle of a buildup of gas pressure within a tube proportional to temperature. Which of the following systems does this statement define?The Lindberg continuous-element fire detection system
What is the principle of operation of the continuous-loop fire detector system sensor?Core resistance material which prevents current flow at normal temp
In a fixed fire-extinguishing system, there are two small lines running from the system and exiting overboard. These line exit ports are covered with a blowout type indicator disc. Which of the following statements is true?When the yellow indicator disk is missing its an indication the fire extinguishing system has been normally discharaged
How is the fire-extinguishing agent distributed in the engine section?Spray nozzles and perforated tubing
The pulling out (or down) of an illuminated fire handle in a typical large jet aircraft fire protection system commonly accomplishes what events?it closes the fuel shutoff, closes the hydraulic fluid shutoff, disconnects the generator field, and arms the fire-extinguishing system.
The explosive cartridge in the discharge valve of a fire-extinguisher container isA life dated unit
Which of the following is the safest fire-extinguishing agent to use from a standpoint of toxicity and corrosion hazards?Halon 1301
After a fire is extinguished, or overheat condition removed in aircraft equipped with a Systron-Donner fire detector, the detection systemAutomatically resets
What retains the nitrogen charge and fire-extinguishing agent in a high rate of discharge (HRD) container?Breakable disk and Fusible Disk
A continuous-loop fire detector is what type of detector?Overheat detector
For fire detection and extinguishing purposes, aircraft powerplant areas are divided into fire zones based onthe volume and the smoothness of the airflow
A fire detection system that operates on the rate-of-temperature rise is aThermocouple system
A fire involving energized electrical equipment is defined as aClass C
What is the operating principle of the spot detector sensor in a fire detection system?a bimetallic thermal switch closes and completes the circuit between the two loops. This initiates the fire warning signal.
The fire detection system that uses a single wire surrounded by a continuous string of ceramic beads in a tube is theFenwal System
How are most aircraft turbine engine fire-extinguishing systems activated?Electrically discharged cartridges
A fuel or oil fire is defined as aClass B
The use of water on class D fireswill accelerate the burning and can cause an explosion
Why does one type of Fenwal fire detection system use spot detectors wired in parallel between two separate circuits?The system can withstand one fault, either an electrical open circuit or a short to ground without sounding a false fire warning.
The system can withstand one fault, either an electrical open circuit or a short to ground without sounding a false fire warning.Smoke detectors
Which of the following fire detection systems measures temperature rise compared to a reference temperature?Thermocouple
The most satisfactory extinguishing agent for an electrical fire isCarbon Dioxide
The fire detection system that uses two wires imbedded in a ceramic core within a tube is theKidde System
Which of the following fire detectors are commonly used in the power section of an engine nacelle?Rate of temp rise detectors
Which of the following fire detection systems will detect a fire when an element is inoperative but will not test when the test circuit is energized?The Kidde and the Fenwal fire detection systems
The most satisfactory extinguishing agent for a carburetor or intake fire isCarbon Dioxide
Which of the following fire detection systems uses heat in the normal testing of the system?The thermocouple system and the Lindberg fire detection system
What is the function of a fire detection system?Activate a warning device
How does carbon dioxide (CO(2)) extinguish an aircraft engine fire?converts into a gas and snow which displaces the oxygen in the immediate area of the fire and smothers the flame
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Question Answer
What is the difference between a fixed and a portable fire extinguishing system?A fixed fire extinguishing system is one that is permanently installed in the aircraft
What constitutes a complete fire protection system?A complete fire protection system includes both a detection and an extinguishing system.
What are three types of fire detection that may' be used on an aircraft?a. Overheat detectors b. Rate-of-temperature-rise detectors c. Flame detectors
What is the principle of operation of a thermal switch type fire detector?A thermal switch type fire detector system utilizes bimetallic switches in the fire zones. When a fire occurs, the temperature rises and closes the switch, illuminating the fire warning light on the instrument panel.
What is meant by a push-to-test fire indicator light?A push-to-test light is one that may be pressed to complete an electrical path to ground to show that the light itself is good.
What is done in a thermal switch type fire detection circuit to test the system?The circuit supplying power to one side of all of the thermal switches is grounded, and if there are no breaks in the line, the fire warning lamp will illuminate
What is the main difference between the thermal switch system and the thermocouple type of fire detection system?A thermal switch system will indicate a fire when a specific temperature is reached, but the thermocouple type system is a rate-of-temperature-rise system and will indicate a fire when the temperature rises suddenly.
What are the three basic parts of a thermocouple type fire detection system?The detector circuit, the alarm circuit, and the test circuit.
Why will a thermocouple type fire detection system not indicate an overheat condition?A gradual rise in temperature will not trigger the thermocouple type system.
What is one of the main advantages of a continuous loop type fire detection system over the individual spot type fire detectors?A continuous loop type system provides a greater area of coverage than is practical with individual spot type fire detectors.
Does a continuous loop type fire detection system operate on a rate-of-temperature rise or a specific temperature indication?It is a specific temperature type fire detection system.
What is the basic principle of fire detection using the continuous loop type fire detection system?The sensitive element in a continuous loop type fire detection system consists of two conductors separated by a thermistor type material. At normal temperatures this material is an insulator, but when the temperature is elevated, it becomes conductive and causes the circuit to indicate a fire.
What is the basic principle of fire extinguishing used in aircraft engine compartments?The oxygen in the engine compartment is displaced by an inert agent that will not support combustion.
What is meant by an HRD type fire extinguishing system?High rate of discharge system.
How does carbon dioxide (C02) extinguish a fire?Carbon dioxide displaces the oxygen in the immediate vicinity of the fire.
What is one of the disadvantages of using methyl bromide as a fire extinguishing agent for aircraft engine fires?Methyl bromide is highly corrosive to aluminum alloys.
Why is CB not generally recommended as an installed type fire extinguishing agent?CB is more toxic than C02 and is corrosive to aluminum and magnesium.
Why is carbon tetrachloride no longer approved as a fire extinguisher for any type of fire?Carbon tetrachloride produces hydrochloric acid fumes, and chlorine and phosgene gas when it comes in contact with hot metal.
How does Halon 1211 act differently from some of the other extinguishing agents to extinguish a fire?Halon 1211 interfers chemically with the combustion process so the fire will go out.
What two fire extinguishing agents are considered the most suitable for aircraft fire extinguishing systems?Halon 1211 and Halon 1301.
In what form is Halon 1211 and 1301 used in aircraft fire extinguishing systems?A liquified gas.
What are the three fire. zones in a turbine engine installation?The engine power section, the engine compressor section, and the complete powerplant compartment.
What determines the selection of fire extinguishing agent for use in turbine engine installation?The airflow conditions through the engine compartment determine the type of extinguishing agent that would be most appropriate.
What are three type of indicator systems used for fire detection in a turbine engine installation?Rate-of-temperature-rise detectors, radiation detectors, and overheat dectectors.
What should be done if you get a tail pipe fire when starting a turbine engine?Turn off the fuel and continue the starting procedure to put out the fire.
What is the danger of using a portable C02 type fire extinguisher to put out a tail pipe fire in a turbine engine?The chilling affect of the CO2 on hot metal wil cause damage to engine components.
Where is the fire warning light usually located in the cockpit of a turbine engine aircraft?In the fire extinguisher "T" handle on the instrument cowl.
What is usually exposed when the fire warning "T" handle is pulled in a turbine engine aircraft?The agent discharge switch is usually hidden by the extinguisher "T" handle and is not exposed until the handle has been pulled.
What type of valve is used to release the fire extinguishing agent in a turbine engine installation?An explosive charge drives a knife blade through a seal, rapidly discharging the extinguishing agent.
What indication is there that the fire extinguishing agent has been discharged by normal operation?A yellow disc on the out~jde of the aircraft is blown out when the agent bottle is discharged normally.
What indication is there that the fire extinguishing agent has been discharged from an overtemperature situation?A red disc on the outside on the airplane is blown out when an agent bottle is discharged because of an overtemperature condition.
How can the flight crew stop the distracting noise when a fire alarm bell sounds in the cockpit?There. is a bell cut-out switch in the fire warning circuit that will silence the fire warning bell.
What is the purpose of the test switch in a fire detection system?The test switch checks the integrity of the entire fire detection system at one time.
What inspections should be made of a continuous loop fire detection system?The continuous-loop sensing element should be checked for cracked or broken sections, for abrasion, and for the condition of the grommet at each location where the element passes through a structural member. It should be checked for any dents, kinks, or any indication of interference between the element and the aircraft structure or the engine.
Should the element of a continuous loop fire detection system be straightened if it has been bent?No, it should not be straightened any, as this could cause stresses that could likely lead to a tubing failure.
How is the state of charge of the sealed bottle of fire extinguishing agent indicated for pre flight inspection?The condition of charge of the fire extinguishing agent in the sealed containers is indicated by a pressure gage, either, located on the container itself, or remotely located on the flight engineers panel.
What procedure must be used when checking the discharge valve of a fire extinguisher container installed in a turbine engine aircraft?Because of the explosive nature of the discharge valve, the manufacturer's service recommendations must be followed in detail.
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Question Answer
Thermoswitches are heat sensitive units that complete electrical circuits atA certain temp
Thermocouple systems operate differently then thermoswitches because theydepend on rate of temp rise
Thermocouple, thermoswitch and spot detecors systems are used for detecting fires inEngine Zones
Which continous loop fire detection system has one sensing element in it?Fenwall
Which continous loop fire detection system that has two sensing elements in it?Kidde
Fire protection systems are designed to do what to the atmosphere with an inert agent?Replace
The three most commonly used detectors for fast dectection of fire are?Rate of rise, radiation sensing and overheat
The engine fire protection of most large turbine engine aircraft consist of 2 sub systemsDetect and Extinguish
The service lift of a fire extinguisher discharge cartridge is calculated fromThe manufactures date stamp
What component of a fire bottle iniates the discharge?Explosive cartridge
If an engine fire is not extinguished when the fire bottle for that engine is activated then what do you dofire the bottle for the other engine
When using a pressure graph to check extinguisher container if the bottle pressure does not fall within the graph limits what do u do with the containerReplace it
The two fire extinguishing agents widely used in turoprop and turbojet engines arehalon 1211 and 1301
Most of older multi engine radial aircraft use what agent ?co2
Yellow rupture disk?Normal discharge
Red rupture disk?thermal/pressure discharge
Fire extinguishing agents used in recips can also be used in turbines TorF ?T
The continous loop fire detection system that uses the magnetic amplifier is the ?Fenwall system
Fenwall spot dector operates without a control unit TorF ?T
Both Kidde and Fenwall sensing loops will automatically reset following a fire or overheat alarm after the overheat condition is removed or the fire is extinguished TorF ?T
Which fire detection systems uses heat in the normal testing of the systemThermacouple and Lindsberg
Which of the following fire detection systems will detect a fire when the element is inoperative but will not test when the circuit is engergized?Kidde and Fenwall
A fire detection system operates in the principal of a build up of gas pressure which is proportional to temp which system does this statement define?Lindberg
How is the fire extinguishing agent distributed in the engine section?Spray nozzles and perfurated tubing
How are most turbine engine aircraft fire extinguishing systems activated?Electrically discharged cartridges
What is the function of a fire detection system?Detect and warn
What retains the nitrogen charge in a HRD container?fuseable disk and breakable disk
What is a safe fire extinguishing agent to use from a standpoint of toxicity and corrosion standards?1301
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