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21 Cards in this Set
- Front
- Back
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What type of extinguishing agent is best for both cabin fires and engine fires? |
Halon 1301 |
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What is a major disadvantage of CO2 fire extinguishing agents for extinguishing aircraft fires? |
It is corrosive to aluminum and magnesium. |
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Why is carbon tetrachloride not recommended as a fire extinguishing agent? |
It produces phosgene, a deadly gas when it is exposed to flames. |
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What is used as a fire extinguishing agent in most of the high rate discharge systems installed in an aircraft? |
Halogenated hydrocarbons such as 1301 pressurized with nitrogen. |
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How can you determine the state of charge of a CO2 fire extinguisher? |
By its weight. |
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How can you determine the state of charge of a freon fire extinguisher container? |
By the pressure shown on the bel- in gage. |
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How does the ambient temperature affect the pressure shown on the pressure gage on a Freon fire extinguisher? |
The higher the temperature, the higher the pressure. |
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What releases the fire extinguishing agent in a high rate discharge (HRD) bottle? |
An electrically ignited powder charge blows a knife through the seal in the HRD bottle. |
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What precaution must you observe when checking the electrical squib of an HRD fire extinguisher bottle for electrical continuity? |
Be cautious not to send enough current to ignite the powder charge as it takes just a very small amount of current to do so. |
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Does a thermocouple fire detection system warn the pilot of a general overheat condition? |
No, it operates on the rate of temperature rise and it detects only a fire. |
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Does the thermal switch fire detection warn the pilot of a general overheat condition? |
No, it actuates only when there is a fire. |
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How is the thermoswitch fire detector circuit checked? |
Close the test switch, if the system is continuous and not shorted the fire warning light and Bell will actuate. |
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How is the continuous loop fire detection circuit checked? |
Close the test switch. If the system is continuous and not shorted, the fire warning light and Bell will actuate. |
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Does a pneumatic fire detection system warn the pilot of a general overheat condition? |
Yes, it actuates when there is a fire or general overheat condition. |
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How is the pneumatic fire detection system tested? |
Close the test switch for low voltage AC to flow through the stainless steel tube in which the gas absorbing elements are housed. The current heats the element which releases the gas and actuates the fire warning light and Bell. |
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What happens when the fire-pull T-handle is pulled on a jet transport Aircraft? |
The bottle discharge switch is uncovered and armed, The generator field relay is tripped, The fuel is shut off to the engine, Hydraulic fluid is shut off to the pump, The engine bleed air is shut off and hydraulic pump low pressure lights are deactivated. |
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What must be done to release the fire extinguishing agent after the fire pull T-handle has been pulled? |
The bottle discharge switch must be closed. |
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What type of fire extinguishers recommended for extinguishing a brake fire? |
Dry powder fire extinguisher. |
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How can you determine whether or not a built-in fire extinguishing system has been discharged? |
Missing Blowout plugs on the outside of the aircraft near the extinguisher agent bottles. |
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What is indicated if the red disks in the built-in fire extinguisher system has blown out? |
The agent bottle has been discharged because of an overheat condition. |
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What is indicated if the yellow disk in the built-in fire extinguishing System is blown out? |
The agent bottle has been discharged by the flight crew by actuating the bottle discharge switch. |
