3 CDC's

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  1. All of these aircraft systems use engine bleed air except
    rain removal.
  2. Bleed air is usually taken from this aircraft engine section.
  3. What is the approximate pressure and maximum temperature of engine bleed air as it is tapped from the engine compression section?
    150 psi and 750°F.
  4. Which component determines the amount of bleed air bled from a gas turbine compressor (GTC)?
    Load control valve.
  5. Engine bleed air check valves are installed to
    provide a primary source for bleed air
  6. What engine bleed air valve prevents air from being lost through the engine when it is shutdown?
  7. This component stops the flow of air to the air-conditioning system.
    Flow control valve
  8. If electrical power is interrupted to the solenoid of an electrically controlled, pneumatically operated air-conditioning system shutoff valve with a fail-safe feature, the valve
    opens or closes depending on system design requirements
  9. What pressure and flow control device restricts airflow and protects aircraft engines against air starvation?
    Pressure regulator.
  10. Due to a loss of energy, the outlet air pressure of an orifice is
    lower than the throat
  11. What is the bleed air system component that controls the airflow by protecting downstream components from excessive pressure?
  12. The amount of airflow through a pressure limiter is affected by each of these except
    outlet pressure
  13. The butterfly valve of the air-conditioning pressure limiter is open when
    there is not enough pressure applied to the system
  14. The flow control valve control in the bleed air air-conditioning system controls flow by maintaining a constant differential pressure between the
    outlet and throat of the venturi
  15. Which bleed air system component is installed upstream of the flow control valve to control the valve’s inlet pressure?
    Pressure limiter
  16. If the source pressure drops below the bleed air pressure regulator setting,
    all available air pressure is supplied to the flow control valve
  17. Which bleed air system component modulates to maintain a constant downstream air pressure?
    Flow control valve
  18. After replacing a bleed air system air-conditioning airflow regulator fusible plug, you must also reset the
    lockout butterfly.
  19. The downstream air temperature of the bleed air air-conditioning system has exceeded the predetermined temperature and has caused the butterfly to close. What flow control and shutoff switch now opens?
  20. Aircraft high-pressure/high-temperature air-conditioning ducting is usually made of this type material
    Aluminum/nickel alloy
  21. What tool do you use to install a high-pressure/high-temperature V-band clamp to ensure it is aligned and sealed properly?
    Center punch
  22. While installing a bleed air system bolted flanged duct end, use a metal or fiber gasket, align the flange, and insert the bottom bolts first to form a cradle. Then, you install the remaining bolts and tighten all the nuts. After the installation is complete, you perform an operational check that reveals a leak.From the above information, what important procedure was overlooked?
    Sealant compound was not used with the gaskets
  23. A crush-type gasket used in the bolted flange aircraft-ducting end is made of
    fiber and fiberglass.
  24. What important fact must you remember, that can be overlooked, when replacing gaskets used in aircraft ducting?
    Always reuse a gasket because it is already shaped to fit the ducts
  25. What type of high-pressure/high-temperature flange ducting does not require a gasket?
  26. What corrective action should you take when a high-pressure/high-temperature compressible flange duct end becomes distorted?
    Use a gasket with the duct ends
  27. Which lubricant can you only use on a medium-pressure/medium-temperature beaded channel clamp sleeve to ease installation?
  28. Expansion joints in aircraft bleed air systems are best used on this type of ducting.
    Long runs
  29. To perform a leakage test on an entire bleed air distribution system you
    listen and feel for leaks
  30. If a bleed air system leak is found in a high pressure/high temperature area, your next step is to
    peel back the insulation
  31. The hand survey air-leakage test method is performed on the aircraft bleed air distribution system after
    resetting the lockout butterfly
  32. You perform an aircraft bleed air system leakage check using the pressure decay method with an aircraft engine; the time for the pressure to drop 30 pounds per square inch (psi) took 11 seconds. This indicates that the system leakage test
    needs to be repeated.
  33. You are troubleshooting an aircraft’s bleed air system and find a leak. What could have caused the leak?
    An orifice that is defective
  34. While troubleshooting an aircraft’s bleed air system you find the system air pressure exceeds the pressure relief valve setting, so the next step you must take is to
    replace the pressure relief valve
  35. You are leak checking an aircraft bleed air system and need to know if the engine bleed air (EBA) shutoff valve is working, so you
    perform a pressure decay leak check
  36. An aircraft’s bleed air cooling system’s pre-cooler is sometimes known as the
    regenerative temperature changer
  37. What components aid the aircraft’s bleed air pre-cooler assembly in maintaining a constant outlet temperature?
    Sensor, temperature control circuit, and modulating valve
  38. Close-assault attack aircraft may develop insufficient cooling in the air conditioning system (ACS) due to
    icing associated with flying at higher altitudes
  39. To create a greater cooling effect, atomized water is sprayed across the inlet of the aircraft bleed air system’s secondary heat exchanger by the
    jet pump
  40. One purpose of the fan in the aircraft bleed air system cooling turbine and fan assembly is to prevent
    moisture in the cold air
  41. Some cooling turbines have a pair of unused wires that are cut-off close to the turbine housing. What level of maintenance uses these wires?
  42. The maximum temperature that a full ceramic bearing can operate is
  43. Aircraft bleed air system water separators remove 70 to 85 percent of the moisture that accumulates in the conditioned air. What causes this to happen?
    Internal compression
  44. The aircraft bleed air system water separator anti-icing system prevents the condenser bag from icing by keeping the turbine
    inlet temperature above 32°.
  45. This bleed air system component causes the aircraft’s cooling turbine to slow down when an icing condition occurs
    Turbine bypass valve
  46. What type air source ventilates the aircraft cockpit when smoke or fumes are discharged from the air-conditioning system?
  47. The warning light in the cockpit is activated by this component if duct pressure on a fighter aircraft’s air-conditioning system (ACS) becomes excessive.
    Cabin temperature limiter
  48. The position of this valve depends on the temperature of conditioned air going to the crew compartment
    Ground cooling ejector
  49. Before the conditioned air enters the crew area of a fighter aircraft, it goes through a final cooling stage in the
    primary heat exchanger
  50. This component removes excessive moisture from conditioned air, preventing it from reaching the cockpit of a fighter aircraft
    Defog valve
  51. Which cabin safety device prevents a fighter aircraft’s air-conditioning system from overheating?
    Overheat switch
  52. Bleed air inlet pressure is maintained at 40 pounds per square inch gauge (psig) at sea level on a bomber air-conditioning system (ACS) by the
    cabin temperature control system pressure regulator and shutoff valve.
  53. A distinct butterfly position controls the flow control valve in the bomber aircraft’s air conditioning system (ACS). An increase or decrease in control pressure is sensed by the flow control’s
  54. When pressure is high enough that it causes a bomber aircraft’s air-conditioning expansion turbine to exceed 110 percent of its maximum operating speed, the
    flow control/shutoff and air conditioning system (ACS) pressure regulator/shutoff valves close.
  55. The water separator over temperature switch in a bomber aircraft’s air-conditioning system (ACS) actuates at
    175 ± 10°F.
  56. Which cargo aircraft’s temperature control component produces an electrical signal that causes the temperature control valve to increase or decrease the compartment temperature to correct an unbalanced bridge condition?
  57. Pressure to the floor heat ejector on a cargo aircraft floor heat system is regulated by the
    floor heat shutoff valve
  58. On a cargo aircraft, the function of the floor heat system’s pneumatic anticipator is to
    control the floor heat shutoff valve.
  59. Where does the air go in an air-conditioning system after the cooling turbine has cooled it?
    Secondary heat exchanger
  60. During flight, the cabin temperature is too high in automatic, but is OK in manual and you think a bad sensor causes the malfunction. What is the next step to verify this condition?
    Check resistance values of sensors
  61. During flight, the cabin temperature is too high in automatic and manual mode and you think a defective warm and cold air-modulating valve is causing the malfunction, so you check
    the electrical operation
  62. The purpose of the aircraft pilot’s anti-gravity (G) suit system is to supply air pressure to
    exert pressure on the pilots lungs
  63. What does an aircraft pilot’s anti-gravity (G) suit prevent?
    Blood from rushing to the brain
  64. Which of the following could be the probable cause of a partially effective windshield defogging system?
    Low engine pressure
  65. What is likely to happen with the canopy defrost system if non-electrostatic application (NESA) window number 2 if window number 1 increases in resistance?
    Window becomes inoperative.
  66. If the numbers 4 and 5 non-electrostatic application (NESA) pilot’s windows are inoperative and the number 3 window is operational, you would first check for
    voltage at the autotransformer.
  67. Perform these steps first to determine if the non-electrostatic application (NESA) autotransformer is operating properly.
    Disconnect the power switch and check for voltage.
  68. In the bleed air anti-icing system, the engine bleed air (EBA) supply duct has a distribution duct (piccolo tube) that can be attached to the leading edge section. If it is, you must then replace the tube by removing
    it for depot level replacement
  69. A portion of the bleed air used for wing anti-icing is dumped overboard and the remaining air
    assists the ejector nozzles in drawing air across the heat exchanger.
Card Set:
3 CDC's
2013-06-06 13:43:38

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