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17 Cards in this Set
- Front
- Back
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Can a thermoswitch–type fire detection system indicate a general overheat condition? |
No, it actuates only when there is a fire. |
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Can a thermocouple–type fire detection system indicate a general overheat condition? |
No, this is a rate–of–temperature–rise–type of system. |
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How is a thermocouple–type fire detection system checked for operation? |
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 break in a continuous–loop fire detection system keep the system from detecting a fire? |
No, but the unit will show a fault when it is tested. |
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Does the pneumatic fire detector system detect a general overheat condition, as well as a fire? |
Yes, it actuates when there is a fire and a general overheat condition. |
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What are the two most commonly used fire extinguishing agents used for engine fires?
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Halon 1301 Carbon dioxide. |
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What extinguishing agent is used in the high–rate–discharge fire extinguishing systems installed in most turbojet engine installations? |
Halon 1301. |
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What happens when the pilot pulls the fire–pull T–handle in the cockpit of a jet transport airplane?
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The bottle discharge switch is uncovered and armed, the generator relay is tripped, fuel is shut off to the engine, hydraulic fluid is shut off to the pump, bleed air is shut off, hydraulic pump low–pressure lights are deactivated. |
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How can a mechanic determine the state of charge of the HRD bottles of fire extinguishing agent? |
A built in pressure gage on the bottle shows the pressure |
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What method is used to discharge an HRD bottle in a turbine engine installation?
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An electrically ignited powder charge blows a knife through the seal and discharges the contents. |
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What is indicated if the yellow blow–out plug of the fire extinguisher system on the side of an engine nacelle is blown out? |
The built–in fire extinguishing system has been discharged by the flight crew. |
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What is indicated if the red blow–out plug of the fire extinguisher system on the side of an engine nacelle is blown out?
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The built–in fire extinguishing system has been discharged by a high temperature condition. |
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What are four types of engine fire detection systems? |
Thermoswitch |
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What would likely cause a false fire alarm in a thermistor–type continuous–loop system? |
A kinked or pinched continuous–loop element |
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How is a pneumatic–type continuous–loop fire detection system checked for operation?
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Close the test switch, low–voltage AC flows through the tube that houses a sensitive element. Current heats the gas element and releases gas, activating the alarm switch |
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What precaution must be taken when checking the electrical circuit for igniting the powder charge in the valve of a high–rate discharge bottle? |
The current used to check the integrity of the circuit must not be high enough to ignite the powder charge |
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What color and marking is used to identify the fluid lines that carry the fire extinguishing agent in an aircraft? |
Brown tape with a series of diamonds on it |
