Air Systems

Question 1

1) The Cabin Temperature controller on the flight deck sets a Master temperature. When selected to the 12 o’clock position, what temperature is commanded?
A. 65 - 85 degrees.
B. 75 degrees.
C. 65 - 75 degrees.
D. 70 degrees.

Answer 1

1) The Cabin Temperature controller on the flight deck sets a Master temperature. When selected to the 12 o’clock position, what temperature is commanded?

B. 75 degrees.

Question 2

2) The recirculation fans draw air from the cabin, through filters, then reintroduce it into the cabin distribution ducts. Turning OFF a fan will result in increased cabin air flow.
A. True.
B. False.

Answer 2

2) The recirculation fans draw air from the cabin, through filters, then reintroduce it into the cabin distribution ducts. Turning OFF a fan will result in increased cabin air flow.

B. False.

Question 3

3) Recirculation fans MUST remain ON when using ground conditioned air for cooling.
A. True.
B. False.

Answer 3

3) Recirculation fans MUST remain ON when using ground conditioned air for cooling.

B. False.

Question 4

4) What does the “PACK L” EICAS message mean?
A. The left pack is inoperative.
B. A pack component has failed and the pack has reverted to standby cooling.
C. A bleed leak has been detected and the pack has shut down.
D. The associated pack is operating at maximum capacity.

Answer 4

4) What does the “PACK L” EICAS message mean?

A. The left pack is inoperative.

Question 5

5) What are the uses of engine bleed air?
A. TAT probe aspiration.
B. Ice detection probe anti-ice.
C. Engine Nacelle and Core anti-ice.
D. Both B and C.

Answer 5

5) What are the uses of engine bleed air?

C. Engine Nacelle and Core anti-ice.

Question 6

6) The forward cargo compartment is heated by ?
A. Forward equipment ventilation system discharge air.
B. Thermal blankets.
C. Inline electric heater in the cargo compartment.
D. A and C are correct.

Answer 6

6) The forward cargo compartment is heated by ?
A. Forward equipment ventilation system discharge air.

C. Inline electric heater in the cargo compartment.
D. A and C are correct.

Question 7

7) A loss of forward equipment cooling on the ground results in .
A. A steady horn sounding in the nose wheel well.
B. EQUIP COOLING FWD EICAS message.
C. Equipment cooling does not operate on the ground.
D. Both A and B are correct.

Answer 7

7) A loss of forward equipment cooling on the ground results in .
A. A steady horn sounding in the nose wheel well.
B. EQUIP COOLING FWD EICAS message.

D. Both A and B are correct.

Question 8

8) The pressurization system normally receives flight parameters .
A. From the Sabre pressurization uplink.
B. From ambient pressure and the FMC flight plan data.
C. From the Landing Altitude settings on the overhead pressurization panel.
D. Pressurization entries on the AIR synoptic.

Answer 8

8) The pressurization system normally receives flight parameters .

B. From ambient pressure and the FMC flight plan data.

Question 9

9) Pressing the AIR COND RESET switch on the overhead panel (per non-normal) will:
A. Reset a failed recirculation fan.
B. Reset a failed trim air valve.
C. Reset a pack fault
D. All the above.

Answer 9

9) Pressing the AIR COND RESET switch on the overhead panel (per non-normal) will:
A. Reset a failed recirculation fan.
B. Reset a failed trim air valve.
C. Reset a pack fault
D. All the above.

Question 10

10) An EICAS message of PACK MODE (L or R) indicates _______.
A. The pack is operating in the Standby Cooling mode.
B. The pack may shut down at lower altitudes and higher outside air
temperatures when ambient conditions do not permit standby cooling.
C. The pack has failed and a descent to an altitude below FL250 is required.
D. A and B are correct.

Answer 10

10) An EICAS message of PACK MODE (L or R) indicates _______.
A. The pack is operating in the Standby Cooling mode.
B. The pack may shut down at lower altitudes and higher outside air
temperatures when ambient conditions do not permit standby cooling.

D. A and B are correct.

Question 11

11) With either outflow valve failed fully open, a loss of pressurization WILL occur.
A. True.
B. False.

Answer 11

11) With either outflow valve failed fully open, a loss of pressurization WILL occur.
A. True.

Question 12

12) With a PACK L or PACK R message displayed on EICAS due to an overheat:
A. The pack reverts to standby cooling.
B. The pack flow rate is reduced to the minimum to keep the pack outlet temperature at an acceptable level.
C. The pack automatically shuts down.
D. The pack automatically switches to the controller for the opposite pack if available.

Answer 12

12) With a PACK L or PACK R message displayed on EICAS due to an overheat:

C. The pack automatically shuts down.

Question 13

13) If the cabin temperature controller fails, the pack(s) will:
A. Modulate to keep cabin temperature between 40 and 110 F.
B. Maintain cabin temperature within 15 degrees of TAT.
C. Trip and automatically shut down.
D. Maintain the last cabin temperature or 75 F.

Answer 13

13) If the cabin temperature controller fails, the pack(s) will:

D. Maintain the last cabin temperature or 75 F.

Question 14

14) Forward equipment cooling system provides ventilation to the FWD E/E bay and electronic equipment on the flight deck.
A. True.
B. False.

Answer 14

14) Forward equipment cooling system provides ventilation to the FWD E/E bay and electronic equipment on the flight deck.
A. True.

Question 15

15) The pressurization system uses to provide Landing altitude barometric pressure correction.
A. The First Officer’s radio altimeter reading
B. The stored FMC TDZE
C. The standby altimeter setting
D. The Captains altimeter setting

Answer 15

15) The pressurization system uses to provide Landing altitude barometric pressure correction.

D. The Captains altimeter setting

Question 16

16) Pack outlet temperature is set by the zone requesting the coldest temperature. All other zones are then warmed by .
A. Inline duct heaters
B. Engine bleed air
C. The Trim Air system
D. Temperature regulators in each PSU

Answer 16

16) Pack outlet temperature is set by the zone requesting the coldest temperature. All other zones are then warmed by .

C. The Trim Air system

Question 17

17) The bulk ventilation fan operates:
A. When AUTO is selected on the FWD cargo temp switch.
B. When AUTO is selected on the BULK CARGO TEMP switch.
C. Anytime live animals are loaded in the bulk compartment.
D. When an aft cargo fire is detected.

Answer 17

17) The bulk ventilation fan operates:

B. When AUTO is selected on the BULK CARGO TEMP switch.

Question 18

18) Pulling the Landing Altitude (LDG ALT) selector:
A. Causes the EICAS pressurization systems indications to display.
B. Allows the crew to directly adjust the cabin altitude while in flight.
C. Overrides the FMC altitude inputs to the cabin altitude controllers.
D. Both A and C.

Answer 18

18) Pulling the Landing Altitude (LDG ALT) selector:
A. Causes the EICAS pressurization systems indications to display.

C. Overrides the FMC altitude inputs to the cabin altitude controllers.
D. Both A and C.

Question 19

19) Which of the following cause the FWD CARGO TEMP “OFF” light to illuminate amber?
A. FWD E&E cooling switch is in override.
B. A fire has been detected in the AFT/BULK CARGO compartments.
C. The FWD E&E exhaust fan is inoperative.
D. A and C are correct.

Answer 19

19) Which of the following cause the FWD CARGO TEMP “OFF” light to illuminate amber?
A. FWD E&E cooling switch is in override.

C. The FWD E&E exhaust fan is inoperative.
D. A and C are correct.

Question 20

20) For takeoff, the automatic pressurization system supplies a small positive pressure
(.11 psi) to minimize “pressure bumps” that could occur during takeoff.
A. True.
B. False.

Answer 20

20) For takeoff, the automatic pressurization system supplies a small positive pressure
(.11 psi) to minimize “pressure bumps” that could occur during takeoff.
A. True.

Question 21

21) The use of both packs provides more efficient operation and is recommended for normal ground operations.
A. True.
B. False.

Answer 21

21) The use of both packs provides more efficient operation and is recommended for normal ground operations.
A. True.

Question 22

22) Outside airflow to the cabin during normal operations may be reduced by:
A. Selecting a higher master cabin temperature.
B. The flight attendant’s entry of the number of occupants on the CABIN OCCUPANTS screen.
C. Ensuring the UPPER and LOWER recirculation fans are OFF.
D. Outside airflow cannot be changed.

Answer 22

22) Outside airflow to the cabin during normal operations may be reduced by:

B. The flight attendant’s entry of the number of occupants on the CABIN OCCUPANTS screen.

Question 23

23) The flight crew can directly control trim air valve position for either the flight deck or
cabin.
A. True.
B. False.

Answer 23

23) The flight crew can directly control trim air valve position for either the flight deck or
cabin.

B. False.

Question 24

24) The FWD and BULK CARGO TEMP switches when set to AUTO, maintain a temperature of approximately F.
A. 60°
B. 70°
C. 80°
D. None of the above.

Answer 24

24) The FWD and BULK CARGO TEMP switches when set to AUTO, maintain a temperature of approximately F.

B. 70°

Question 25

25) The pressurization system may be operated manually by: A. Setting the OUTFLOW VALVE switches to MAN and adjusting the outflow valve position. B. There is no manual mode capability. C. Adjusting the Landing Altitude knob. D. A and C.

Answer 25

25) The pressurization system may be operated manually by: A. Setting the OUTFLOW VALVE switches to MAN and adjusting the outflow valve position. C. Adjusting the Landing Altitude knob. D. A and C.

Question 26

26) What are the manual selection limits when using the Landing Altitude selector, the manual landing field selection limits are: A. There are no limits. B. 2000 feet below sea level to 14,000 feet above sea level. C. 1000 feet below sea level to 10,000 feet above sea level. D. 500 feet below sea level to 8,500 feet above sea level.

Answer 26

26) What are the manual selection limits when using the Landing Altitude selector, the manual landing field selection limits are: B. 2000 feet below sea level to 14,000 feet above sea level.

Question 27

27) The pack OFF light will illuminate amber when? A. During engine start. B. When there is a pack high temperature condition. C. When manually selected to OFF. D. Any of the above.

Answer 27

27) The pack OFF light will illuminate amber when? A. During engine start. B. When there is a pack high temperature condition. C. When manually selected to OFF. D. Any of the above.

Question 28

28) The alternate ventilation system . A. May only be used during pressurized flight. B. Provides a means of ventilating the cabin in the event both packs have failed. C. Provides a backup method of pressurizing the cabin if both packs fail. D. Is designed to improve cabin airflow when the loss of one or two CAC's.

Answer 28

28) The alternate ventilation system . B. Provides a means of ventilating the cabin in the event both packs have failed.

Question 29

29) The Electric Load Management system can limit Cabin Air Compressor (CAC) operations during electrical load shed operations. A. True. B. False.

Answer 29

29) The Electric Load Management system can limit Cabin Air Compressor (CAC) operations during electrical load shed operations. A. True.

Question 30

30) During engine start, both packs shutdown and do not restart until 2 minutes after the start is initiated and the engine is running. A. True. B. False.

Answer 30

30) During engine start, both packs shutdown and do not restart until 2 minutes after the start is initiated and the engine is running. A. True.

Question 31

``` 31) During cruise flight, the maximum cabin altitude during normal operations is . A. 10,000 feet B. 6000 feet C. 8000 feet D. 7000 feet ```

Answer 31

31) During cruise flight, the maximum cabin altitude during normal operations is . B. 6000 feet

Question 32

32) What cruise altitude is assumed if the cruise altitude from the FMC (while in AUTO pressurization) is unavailable? A. With an FMC cruise altitude unavailable, manual pressurization must be used. B. 30,000 feet. C. 43,000 feet. D. 35,000 feet.

Answer 32

32) What cruise altitude is assumed if the cruise altitude from the FMC (while in AUTO pressurization) is unavailable? C. 43,000 feet.

Question 33

33) If PECS coolant level is below acceptable during preflight, what indication(s) does the flight crew have of the condition? A. An EICAS “PEC LO” advisory message. B. An RF indication by the quantity value on STATUS page C. An amber indication for the quantity on the status page. D. B and C are correct.

Answer 33

33) If PECS coolant level is below acceptable during preflight, what indication(s) does the flight crew have of the condition? B. An RF indication by the quantity value on STATUS page C. An amber indication for the quantity on the status page. D. B and C are correct.

Question 34

34) The flight deck humidifier operates when the HUMID switch is ON and: A. Only when the aircraft is on the ground. B. Engine anti-ice is operating. C. Only between 10,000 feet and 18,000 feet. D. In cruise flight. The system automatically switches OFF approximately 1 - 1.5 hours prior to touchdown.

Answer 34

34) The flight deck humidifier operates when the HUMID switch is ON and: D. In cruise flight. The system automatically switches switches OFF approximately 1 - 1.5

Question 35

35) The CAC deflector doors may retract when the ambient air temperature is below 35°F or above 95°F. A. True. B. False.

Answer 35

35) The CAC deflector doors may retract when the ambient air temperature is below 35°F or above 95°F. A. True.

Question 36

36) Airflow from the CACs to the packs may be regulated by the flight attendants using the Cabin Attendants Panel. A. True. B. False.

Answer 36

36) Airflow from the CACs to the packs may be regulated by the flight attendants using the Cabin Attendants Panel. A. True.

Question 37

37) The Lower Recirculation System provides additional cabin cooling and helps reduce the power required by the CACs. A. True. B. False.

Answer 37

37) The Lower Recirculation System provides additional cabin cooling and helps reduce the power required by the CACs. A. True.

Question 38

38) To increase cabin fresh air flow the LOWER RECIRC fans may be turned OFF. A. True B. False.

Answer 38

38) To increase cabin fresh air flow the LOWER RECIRC fans may be turned OFF. B. False.