Tepsilon 2013

50 Questions

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Mathematics Quizzes & Trivia

Questions and Answers
  • 1. 
    (804) The purpose of purging the servicing unit supply hose in an aircraft liquid coolant system is to
    • A. 

      Remove air from the servicing cart.

    • B. 

      Remove contaminants from the system.

    • C. 

      Prevent air from entering the system.

    • D. 

      Prevent moisture from entering the servicing cart.

  • 2. 
    (804) How many gallons of liquid coolant should initially be pumped into the aircraft liquid coolant system with the radar shunt hose installed?
    • A. 

      1/2

    • B. 

      1

    • C. 

      1 1/2

    • D. 

      2

  • 3. 
    (804) When servicing the aircraft liquid coolant system, leave the used can of coolant fluid installed on the servicing unit to prevent this from happening to the unit.
    • A. 

      Damage.

    • B. 

      Leakage.

    • C. 

      Destruction.

    • D. 

      Contamination.

  • 4. 
    (807) This valve prevents a complete loss of oxygen in a low-pressure gaseous oxygen system
    • A. 

      Filler.

    • B. 

      Check.

    • C. 

      Shutoff.

    • D. 

      Pressure reducing.

  • 5. 
    (808) Liquid oxygen converts to gaseous oxygen at an expansion ratio of
    • A. 

      600 to 1.

    • B. 

      680 to 1.

    • C. 

      800 to 1.

    • D. 

      860 to 1.

  • 6. 
    (801) How does a liquid fire-extinguishing agent extinguish an aircraft fire?
    • A. 

      Releases a fine mist vapor.

    • B. 

      Releases nitrogen into the area.

    • C. 

      Removes oxygen from the fire.

    • D. 

      Disperses a heavy concentration of liquid.

  • 7. 
    (801) A gaseous nitrogen (N2) charge is added to a liquid fire-extinguishing agent to
    • A. 

      Convert the liquid to a gas upon discharge.

    • B. 

      Expel the agent from its bottle.

    • C. 

      Assist in extinguishing the fire.

    • D. 

      Stabilize the temperature.

  • 8. 
    (802) A flashing red light on the fire emergency control T-handle indicates this has happened.
    • A. 

      An overheat condition.

    • B. 

      An air valve is closed.

    • C. 

      A fuel valve is open.

    • D. 

      A fire.

  • 9. 
    (803) An aircraft’s liquid coolant system keeps components cool by
    • A. 

      Cycling through the components.

    • B. 

      Directing coolant across the components.

    • C. 

      Cycling conditioned air throughout the system.

    • D. 

      Directing conditioned air across the components.

  • 10. 
    (803) If air that is trapped in a liquid coolant system is not bled out of the expansion relief valve it
    • A. 

      Causes a low-pressure condition.

    • B. 

      Activates the filter delta pressure switch.

    • C. 

      Forces the thermal modulating valve closed.

    • D. 

      Reduces the cooling capability of the coolant.

  • 11. 
    (803) What valve component of an aircraft liquid coolant system is positioned by the temperature of the coolant?
    • A. 

      Thermal pilot.

    • B. 

      Thermal modulating.

    • C. 

      Delta system bypass.

    • D. 

      Over-pressure relief.

  • 12. 
    (804) Over-torquing clamps, when maintaining an aircraft liquid coolant system, causes this to happen with the clamps’ components.
    • A. 

      Leakage.

    • B. 

      Contamination.

    • C. 

      Nothing happens

    • D. 

      Damage or failure

  • 13. 
    (805) Why are multiplace life raft cylinders wire-wound and dip-soldered?
    • A. 

      Decreases metal fatigue.

    • B. 

      Adds strength to the cylinder.

    • C. 

      Decreases cylinder expansion.

    • D. 

      Increases cylinder corrosion resistance.

  • 14. 
    (806) What must you do to ensure your safety when you recharging life raft inflation cylinders?
    • A. 

      Charge in a well ventilated area.

    • B. 

      Allow no one to enter the controlled area.

    • C. 

      Wear your dosimeter badge to ensure proper levels of nitrogen.

    • D. 

      Place the high-pressure cylinders up on the table to get a good flow of liquid.

  • 15. 
    (807) Oxygen in its natural state is
    • A. 

      Colorless, tasteless, and odorless.

    • B. 

      Colorless, tasteless, and weightless.

    • C. 

      Odorless, massless, and volumeless.

    • D. 

      Odorless, massless, and weightless.

  • 16. 
    (810) When replacing oxygen tubing, use clamps to support it near all bends and at least every
    • A. 

      20 inches.

    • B. 

      15 inches.

    • C. 

      10 inches.

    • D. 

      5 inches.

  • 17. 
    (811) You must purge an aircraft’s gaseous oxygen (GOX) system by
    • A. 

      Opening the oxygen bottles.

    • B. 

      Using a liquid oxygen cryotainer.

    • C. 

      Using a gaseous oxygen-servicing trailer.

    • D. 

      Opening the system to the environment for six hours.

  • 18. 
    (811) On a gaseous oxygen (GOX) servicing trailer, you control the flow of oxygen by
    • A. 

      Opening the manifold valves manually.

    • B. 

      Opening the servicing valves manually.

    • C. 

      Venting the excess pressure off with the recharge valves.

    • D. 

      Venting the excess pressure off with the pressure regulator valves.

  • 19. 
    (814) When using a water-soluble cleaning agent from components, the first step is to
    • A. 

      Flush with large quantities of distilled water.

    • B. 

      Dry by purging with oil-free air or specified nitrogen.

    • C. 

      Inspect visually for complete internal moisture removal.

    • D. 

      Dry in an oven with a temperature less than 250 degrees Fahrenheit (deg F).

  • 20. 
    (815) After purging a liquid oxygen (LOX) storage and transfer cart, the next step is to
    • A. 

      Continue to allow the unit to cool the cryotainer to 120 degrees Fahrenheit (°F).

    • B. 

      Continue to allow the unit to cool the cryotainer to 150°F.

    • C. 

      Turn off the unit and let the cryotainer to cool down to 120°F.

    • D. 

      Turn off the unit and let the cryotainer to cool down to 150°F.

  • 21. 
    (808) Which oxygen system allows oxygen to flow automatically to the distribution system whencabin altitude reaches 12,500 feet?
    • A. 

      Crew.

    • B. 

      Troop.

    • C. 

      Low-pressure

    • D. 

      High-pressure.

  • 22. 
    (807) What cellulose tape colors identify supply and distribution tubing for aircraft oxygensystems?
    • A. 

      Black and red.

    • B. 

      Blue and yellow.

    • C. 

      Green and white.

    • D. 

      Brown and orange.

  • 23. 
    (809) If you find oxygen system tubing within 2 inches of aircraft control cables, your next step isto
    • A. 

      Reroute control cables.

    • B. 

      Bend or reroute the tubing.

    • C. 

      Inspect for possible burn marks.

    • D. 

      Clamp the tubing to the control cables.

  • 24. 
    (808) What is the handle on a manually operated buildup and vent valve designed to prevent on anaircraft liquid oxygen (LOX) system?
    • A. 

      Slow pressure buildup

    • B. 

      Rapid venting of system pressure

    • C. 

      Filler access door from closing in the vent position

    • D. 

      Liquid oxygen system pressure loss during maintenance

  • 25. 
    (806) When you are charging a multiplace life raft inflation assembly, do not reposition theassembly on a platform because moving it may
    • A. 

      Cause damage to the life raft.

    • B. 

      Change the hose weight amount.

    • C. 

      Cause the charging hose to detach.

    • D. 

      Require a new check valve control head.

  • 26. 
    (808) What pressure valve component in a 70 pound per square inch (psi) liquid oxygen (LOX)system has the ability to draw gaseous oxygen from the head pressure, which builds up 10 poundsper square inch above a normal setting?
    • A. 

      Vent

    • B. 

      Closing

    • C. 

      Buildup

    • D. 

      Opening

  • 27. 
    (808) This is a disadvantage of a continuous-flow oxygen regulator compared to the pressure demand system in a liquid oxygen system (LOX).
    • A. 

      Wastes oxygen.

    • B. 

      Is unusable below 10,000 feet

    • C. 

      Is usable only above 20,000 feet

    • D. 

      Delivers oxygen at varying pressures

  • 28. 
    (808) What component in the pressure-demand oxygen regulator causes 100 percent oxygen to bedelivered to the user when the cabin altitude of an aircraft reaches 30,000 feet?
    • A. 

      Air inlet valve.

    • B. 

      Demand valve.

    • C. 

      Diluter aneroid.

    • D. 

      Pressure breathing aneroid.

  • 29. 
    (807) What does the molecular sieve oxygen generating system (MSOGS) concentrator supply tothe OXYGEN regulator control panel?
    • A. 

      93 percent nitrogen.

    • B. 

      16 man-minutes of oxygen.

    • C. 

      93 percent oxygen-enriched gas.

    • D. 

      100 percent oxygen-enriched gas.

  • 30. 
    (807) In a high-pressure oxygen system, the tubing between the filler valve and the pressurereducer valve is made of this type alloy.
    • A. 

      Iron.

    • B. 

      Brass.

    • C. 

      Copper.

    • D. 

      Aluminum.

  • 31. 
    (801) What component holds a liquid agent and a nitrogen charge in a liquid-agent fire extinguishercontainer?
    • A. 

      Squib.

    • B. 

      Frangible disc.

    • C. 

      Bonnet assembly.

    • D. 

      Rubber O-ring packing.

  • 32. 
    (801) The frangible disc is undercut into pie shaped sections in a liquid-agent fire extinguishercontainer to
    • A. 

      Break easily.

    • B. 

      Break cleanly into large pieces.

    • C. 

      Allow the pieces to enter the strainer unclogging it.

    • D. 

      Enable the pieces to pass easily through the strainer.

  • 33. 
    (802) If the container pressure becomes too low in a T-handle liquid-agent fire extinguishing system, then a
    • A. 

      Pressure switch opens.

    • B. 

      Pressure switch closes.

    • C. 

      Safety outlet port opens.

    • D. 

      Safety outlet port closes.

  • 34. 
    (805) Actuating this component normally releases carbon dioxide (CO2) from a life raft cylinderinto a life raft.
    • A. 

      Cam.

    • B. 

      Rupture disc.

    • C. 

      Locking sleeve.

    • D. 

      Check valve seat.

  • 35. 
    (805) What component of a life raft inflation cylinder assembly keeps carbon dioxide (CO2)within the cylinder and permits an unrestricted flow of CO2 to the life raft?
    • A. 

      Diffuser plug.

    • B. 

      Seating sleeve.

    • C. 

      Cartridge filter.

    • D. 

      Discharge valve.

  • 36. 
    (807) What valve is required to decrease system pressure in a high-pressure gaseous oxygensystem?
    • A. 

      Relief.

    • B. 

      Closing.

    • C. 

      Control.

    • D. 

      Reducer.

  • 37. 
    (807) Which part of the body usually suffers first from the effects of hypoxia, which is the lack ofoxygen at high altitudes?
    • A. 

      Ears.

    • B. 

      Eyes.

    • C. 

      Nose.

    • D. 

      Lungs.

  • 38. 
    (808) What causes oxygen and pressure breathing to be available in the pressure breathing for G(PBG) position once the PBG/ON/OFF toggle is placed in that position?
    • A. 

      Negative signal from the pressure-demand valve.

    • B. 

      Negative signal from the emergency flow valve.

    • C. 

      Positive signal from the diluter valve.

    • D. 

      Positive signal from the anti-G valve.

  • 39. 
    (810) A liquid oxygen (LOX) component is being replaced and you are ready to install the pipethreadfittings. Your next step is to
    • A. 

      Check the component for leaks.

    • B. 

      Check the component for proper operation.

    • C. 

      Service with LOX and perform an evaporation check.

    • D. 

      Apply a small amount of anti-seize tape to the first three threads.

  • 40. 
    (811) You are ready to clean components from a gaseous oxygen (GOX) cart. What is the firststep?
    • A. 

      Remove any dust or loose debris with a damp cheesecloth.

    • B. 

      Remove any dust or loose debris with filtered air.

    • C. 

      Check with an ultraviolet light.

    • D. 

      Wash the components.

  • 41. 
    (812) When performing a service test on a low-pressure gaseous oxygen system, after filling thesystem, you must
    • A. 

      Record the oxygen gauge pressure immediately.

    • B. 

      Record the ambient temperature immediately.

    • C. 

      Wait for the system to cool for three hours.

    • D. 

      Wait for the system to cool for one hour.

  • 42. 
    (812) After performing an evaporation loss test on a liquid oxygen system, you fill the converterto its capacity with liquid oxygen and
    • A. 

      Allow it to stabilize 2 hours before taking next reading.

    • B. 

      Allow it to stabilize 6 hours before taking next reading.

    • C. 

      Leak check the system.

    • D. 

      Sign off the servicing.

  • 43. 
    (813) Heat gain and liquid oxygen (LOX) boil-off is minimized in the annular space of a TMU 27/M LOX storage and transfer-servicing cart using this type insulation.
    • A. 

      Perilate.

    • B. 

      Aluminized polyester film.

    • C. 

      High-grade glass wool.

    • D. 

      Fiberglass and styrofoam.

  • 44. 
    (813) The transfer hose on a liquid oxygen (LOX) cart is made from stainless steel and this typealloy.
    • A. 

      Bronze.

    • B. 

      Copper.

    • C. 

      Titanium.

    • D. 

      Aluminum.

  • 45. 
    (814) Once you clean a TMU 27/M liquid oxygen storage and servicing cart component, the nextstep is to
    • A. 

      Inspect the area with a bright light.

    • B. 

      Inspect the area in natural sunlight.

    • C. 

      Install a serviceable tag and place it in a bag.

    • D. 

      Install an oxygen use only tag and place it in a bag.

  • 46. 
    (814) You find evidence of oil while using the “ultraviolet light method” of cleaning inspectionson the TMU 27/M liquid oxygen storage and servicing cart. What action must you take?
    • A. 

      Do nothing.

    • B. 

      Wipe the oil off.

    • C. 

      Reject the part and clean again.

    • D. 

      Reject the part and put in the scrap metal bin.

  • 47. 
    (815) You are purging a liquid oxygen (LOX) storage and transfer cart. The purge is consideredcomplete when the temperature of the air exiting the fill and drain outlet has been maintained atthis temperature for 1 hour.
    • A. 

      220 degrees Fahrenheit (°F).

    • B. 

      250°F.

    • C. 

      320°F.

    • D. 

      350°F

  • 48. 
    (816) While performing evacuation procedures on a liquid oxygen (LOX) storage and transfertank, you find that the vacuum on a cryotainer is too high. What action should you take?
    • A. 

      Vacuum down the storage space of the tank.

    • B. 

      Vacuum down the annular space on the tank.

    • C. 

      Check the reading again with another vacuum gauge.

    • D. 

      Verify the reading on another cryotainer’s annular space.

  • 49. 
    (817) While troubleshooting an aircraft liquid oxygen (LOX) storage and transfer tank, you findthe safety disc blows out below pressure setting that is caused by a defective pop safety valve.You then take this action with the valve.
    • A. 

      Fill.

    • B. 

      Repair.

    • C. 

      Replace.

    • D. 

      Stabilize.

  • 50. 
    (817) While transferring liquid oxygen (LOX) from a TMU 27/M servicing trailer to an aircraftoxygen converter, you notice the rate of transfer is very slow. You then troubleshoot by lookingfor
    • A. 

      Perlite settling.

    • B. 

      Low tank pressure.

    • C. 

      Excessive boil off.

    • D. 

      Vacuum valve leakage.