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69 Cards in this Set
- Front
- Back
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Name 4 symptoms associated with exposure to fire extinguishing agents. |
light headedness headaches shortness of breathe nausea |
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How does not having enough nitrogen charge affect an agents discharge? |
the cylinder won't have enough pressure to properly discharge |
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What results when the extinguisher is discharged if a frangible disc strainer were not installed in the liquid-agent fire extinguisher container? |
Pieces of the disc could clog the tubing and nozzles. |
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What happens if the time delay relay in the 2 shot fire extinguishing system does not operate properly? |
The extinguisher may fire into the wrong engine |
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What happens after the pilot places the No. 1 engine selector switch to the ON position? |
Positions wing selector valve and No. 1 engine selector valve so that the agent can reach the No. 1 engine |
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What happens once the fire emergency control handle (T-handle) is pulled? |
Current flows to the squib. The squib breaks a post and agent discharges |
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What must you do before depressing the discharge switch of the T-handle system during an operational check? |
Ensure the electrical connector is disconnected from the squib to prevent accidental discharge |
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List the characteristics of liquid coolant. |
dielectric nonconductor noncorrosive |
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During a liquid coolant system's operation, the liquid coolant is at normal temperatures. How is the temperature kept from changing? |
heat exchanger |
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What is the maximum amount of time you can safely fun the liquid coolant system in the test position? |
6.5 minutes |
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What visual indicator alerts you to a dirty liquid coolant filter? |
Pop up differential indicator |
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What happens when the temperature of the coolant exceeds 115 degrees F during system operation? |
Pilot valve closes. Modulating valve closes. Coolant goes through heat exchanger |
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What is the procedure to replace the liquid coolant system filter? |
have new system on hand. clean filter bowl with cloth reset pop up indicator |
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What should you do if the ASP indicates FAILED condition or you suspect contamination of a liquid coolant system? |
Purge before operation |
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Why must the servicing unit supply hose be purged before you put coolant into the liquid coolant system? |
To flush the hose of contaminants |
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How is the cable and ball assembly used to release the CO2 from the one-person life rafts inflation assembly? |
The ball of the assembly is engaged into a slot in the rotating cam. When the cable is pulled, the cam releases CO2 |
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How is the one-person life raft's inflation assembly protected from excessive pressures? |
CO2 breaks rupture disc and releases pressure |
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Why is it important to use the size and type of wire specified by the TO when safety sealing life raft inflation cylinder? |
If wrong size/type is used it may make discharging the cylinder impossible |
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What must CO2 go through before it is allowed to recharge a cylinder? |
Must pass through 2 dehydrator filters connected in series |
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You're ready to recharge an empty inflation cylinder. You find the weight of the empty cylinder doesn't match the weight stenciled on its side. What do you do? |
Restencile before servicing |
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What must you do when you're recharging a one-person inflation cylinder after stenciling the cylinder? |
Use scribe to raise and release locking sleeve |
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You have attached the charging hose to a one-person life raft cylinder, laid the assembly on the scale and opened the check valve. What happens next? |
Charging pressure opens check valve |
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What safety step must you take before bleeding pressure from the one-person raft inflation assembly? |
Install diffuser plug in charge and discharge port |
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A one-person life raft inflation assembly has just been recharged. What must be done before it can be installed on a life raft? |
Must be submerged in water for 30 minutes and then reweighed 24 hours later |
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Why must aviators breathing oxygen be nearly "bone dry"? |
Moisture can cause the system to work ineffectively |
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What effects does a lack of oxygen have on the body? |
blurred vision shortness of breathe weak feeling dizziness |
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What can cause gaseous oxygen to leak at the filler valve during servicing? How can this problem be corrected? |
Unpropper connection replace filler valve |
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What construction method prevents high-pressure gaseous oxygen cylinders from shattering? |
By using heat treated alloy or by welding metal bands to outside surface |
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How do high-pressure oxygen lines differ from low-pressure oxygen lines? |
High pressure- copper alloy; silver solder fittings Low pressure- aluminum alloy; flared fittings |
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What happens if the MSOGS concentrator fails? |
It will turn on an oxygen caution light in the cockpit and automatically switch to the BOS |
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Whats the purpose of the pressure-opening valve? |
opens if head pressure in the container builds up approximately 10 psi above normal |
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How does warm-up coil convert liquid oxygen to gaseous oxygen? |
its large surface area lets liquid oxygen absorb heat and evaporate to a gaseous state before reaching the regulator |
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With what types of oxygen systems can the MD-1 oxygen regulator be used? |
Gaseous or Liquid at high or low pressure |
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How is oxygen increased to the user at an altitude of 30,000 ft by the pressure-demand regulator? |
The diluter aneroid closes the air inlet valve and the user will get 100% oxygen |
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Whats the purpose of the troop oxygen system? |
Used on larger aircrafts that are capable of carrying troops, paitients |
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Whats the intended use of the bailout bottle? |
Emergency oxygen assemblies that are intended for high altitude emergencies or parachute decent |
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How does the capacitance indicating system change its indication as the quantity changes? |
The capacitance of the probe decreases if the quantity of the LOX in the converter decreases |
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Why is coaxial cable used between the quantity indicator and converter probe? |
The container indication signal moving in the signal wire is protected from stray external signals by the cable |
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What should you do if you find chaffed mask-to-regulator hoses? |
Replace hose |
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During an inspection, the no-go part of a go-no-go gauge passes into the smallest part of the connector, what should you do? |
replace connector |
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What safety precautions must you take when you find oxygen tubing within 2 inches of electrical wiring? |
Bend or reroute oxygen tubing to maintain 2 inches of clearance |
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What are the potential discrepancies you should look for when you're inspecting an oxygen converter? |
ensure its mounted securely and are free of damage, excessive dents and loss of vaccum |
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What should you check for when installing oxygen tubing in an aircraft? |
make sure it is free of leaks |
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What should you do as you are installing an oxygen component near fuel lines? |
6 inches of clearance between the two |
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How should you apply anti-seize tape to a fitting? |
sparingly, so it doesn't get into the system |
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How do you prevent oxygen fittings from turing as the B-nuts are loosened or tightened? |
hold fitting with a wrench |
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What should you do as you re installing a bonding jumper? |
make sure its the right length and has low resistance |
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What should you do if an odor is identified in a gaseous oxygen system? |
Purge it |
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What must you do first before connecting the service valve to the aircraft? |
Bleed recharging hose |
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What is the procedure for purging a converter assembly? |
1) Drain 2) Connect to purge kit 3) Adjust to 115 VAC 60-400 cycles 4) Pressurize equipment 5) Leak check 6) Circulate air and turn on Heat element |
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What are the steps to hot purge an aircraft LOX system? |
1) connect purge kit 2) buildup position 3) turn on regulators 4) cool down 5) service with lox |
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Before leak testing a gaseous oxygen system, and after filling the system it is imperative to perform this action. |
Recored gauge pressure and ambient temperature |
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You insert a check valve leak tester into a filler valve and wipe film of soap solution over open end of the tester. Very quickly the soap bubbles out, what is the next step? |
Determine what valves are leaking |
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What type of insulation is used in the annular space of the TMU-27/M servicing unit? |
aluminized polyester film insulation |
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Why are thin, stainless steel supports used between the inner and outer tanks of a cryotainer? |
so they don't conduct much heat to the inner tank |
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What malfunction would you suspect if there were an overpressure condition on the outer tank? |
leak from the inner tank to the annular space |
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How does the capacity gauge work on the TMU-27/M liquid storage and transfer cart? |
The dial indicator is coupled magnetically and mechanically to a float sensor inside the inner tank and calibrated in gallons |
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Where should you reference prior to cleaning components? |
T.O. 15X-1-1 Oxygen Equipment |
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What precautions should you take prior to handling internal parts? |
Never clean components with previously used cleaning solvent. Wear disposable gloves |
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What 6 items should you consider to ensure an adequate level of cleanliness before cleaning oxygen components? |
1) cleaning facilities 2) pick a cleaning agent 3) pick a cleaning method 4) inspect for cleanliness 5) drying 6) packaging |
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What are the steps to removing a solvent cleaner from a component? |
1) must be dry 2) Purge with clean air 3) continue drying 4) visually inspect |
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What is important to do before beginning the draining process? |
Ensure the container is free of all hydrocarbons such as oil, grease, gas and wood |
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What is your next step once the tank is drained? |
Purge |
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If you notice the blower turning the wrong way, what steps must you take to correct it? |
Stop the unit and change the setting of the phase reversal switch |
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You are purging a cryotainer and it reaches a temperature of 200 degrees F. How long are you required to purge? |
2 hours |
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Explain how a rotary vacuum pump operates. |
rotation from the pump driven sheave causes the shaft to turn this turns the blade and draws in air |
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What steps should you take if an air purging unit isn't available and a cryotainer needs to be evacuated? |
Open seal off plug. Run pump until all air is gone from hose. Open vale and operate pump until the vacuum reaches the required valve. 8-24 hours. |
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While transferring liquid oxygen to an aircraft using TMU-27/M servicing trailer, you notice the rate of servicing is very slow. What are some of the probable causes? |
Plugged filter in the service line Leak in service line or hose Low tank pressure |
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You identify the cryotainer is continually venting, and know the buildup valve and vacuum are good. What component spaces should you check? |
build up valve internal leakage loss of vacuum in annular improper adjustable relief valve setting |
