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UAL 787 SKV > Air Systems > Flashcards

Air Systems Flashcards

1
Q

The Flight Deck Temperature selector sets a target flight deck temperature. When selected to the 12 o’clock position, what temperature is commanded? [8.20.30]

A

75 degrees.

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2
Q

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. [8.20.20]

True or False?

A

False.

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3
Q

The flight deck receives 100% fresh conditioned outside air and the passenger cabin receives a mix of outside air and recirculated air. [8.20.20]

True or False

A

True.

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4
Q

What does the “PACK L” EICAS message mean? [8.20.20]

A

The left pack is inoperative.

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5
Q

What are the uses of engine bleed air? [8.20.10]

A

Engine core and inlet cowl anti-ice.

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6
Q

The forward cargo compartment is heated by: [8.20.20]

A
  • Forward E/E cooling exhaust air.
  • Inline electric heater in the cargo compartment.
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7
Q

A loss of forward equipment cooling on the ground results in: [8.20.20]

A
  • A ground crew call horn sounding in the nose wheel well.
  • EQUIP COOLING FWD EICAS advisory message.
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8
Q

The pressurization system normally receives flight parameters: [8.20.40]

A

From ambient pressure and the FMC flight plan data.

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9
Q

Pressing the AIR COND RESET switch on the overhead panel (per non-normal) will: [8.20.30]

A

A. Reset a failed recirculation fan.
B. Reset a failed trim air valve.
C. Reset a pack fault
D. All the above.

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10
Q

An EICAS message of PACK MODE (L or R) indicates _______. [8.20.20]

A
  • The pack is operating in the Standby Cooling mode.
  • The pack may shut down at lower altitudes and higher outside air temperatures when ambient conditions do not permit standby cooling.
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11
Q

Cabin altitude and full ventilation rates can be maintained by either outflow
valve. [8.20.40]

True or False?

A

True.

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12
Q

With a PACK L or PACK R message displayed on EICAS due to an overheat: [8.20.20]

A

The pack automatically shuts down.

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13
Q

If the cabin temperature controller fails, the pack(s) will: [8.20.20]

A

Maintain the last cabin temperature or 75 F.

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14
Q

Forward equipment cooling system provides ventilation to the FWD E/E bay and electronic equipment on the flight deck. [8.20.20]

True or False?

A

True.

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15
Q

The pressurization system uses to provide landing altitude barometric pressure correction. [8.20.40]

A

The Captains altimeter setting

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16
Q

Pack outlet temperature is set by the zone requesting the coldest temperature. All other zones are then warmed by: [8.20.20]

A

The Trim Air system

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17
Q

The bulk ventilation fan operates: [8.20.20]

A

When AUTO is selected on the BULK CARGO TEMP switch.

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18
Q

Pulling the Landing Altitude (LDG ALT) selector: [8.20.40]

A
  • Causes the EICAS pressurization systems indications to display.
  • Overrides the FMC altitude inputs to the cabin altitude controllers.
19
Q

Which of the following cause the FWD CARGO TEMP switch “OFF” light to illuminate amber? [8.20.30]

A
  • FWD CARGO TEMPswitch selected off.
  • Forward cargo heater overheat.
20
Q

For takeoff, the automatic pressurization system supplies a small positive pressurization at rotation to provide a smooth transition to the cabin altitude climb schedule. [8.20.40]

True or False?

A

True.

21
Q

The use of both packs provides more efficient operation and is recommended for normal ground operations. [8.20.20]

True or False?

A

True.

22
Q

Outside airflow to the cabin during normal operations may be reduced by: [8.20.20]

A

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

23
Q

The Flight Deck Temperature selector on the air conditioning panel can select a target temperature (e.g., 70°). [8.20.30]

True or False?

A

True.

24
Q

The FWD and BULK CARGO TEMP switches when set to AUTO, maintain a temperature of approximately F. [8.20.30]

A

70°

25
Q

The pressurization system may be operated manually by: [8.20.40]

A

Setting the OUTFLOW VALVE switches to MAN and adjusting the outflow valve position using the related OUTFLOW VALVE switch to OPEN or CLOSE.

26
Q

What are the manual selection limits when using the Landing Altitude selector? [8.20.40]

A

2000 feet below sea level to 14,000 feet above sea level.

27
Q

When will the pack OFF light illuminate amber? [8.20.30]

A

A. During engine start.
B. When there is a pack high temperature condition.
C. When manually selected to OFF.
D. Any of the above.

28
Q

The alternate ventilation system: [8.20.20]

A

Provides a means of ventilating the cabin in the event both packs are inop.

29
Q

The electrical system, using electronic controllers, can limit CAC operation during load shed operations. [8.20.20]

True or False?

A

True.

30
Q

During engine start, both packs shutdown and do not restart until 2 minutes after the start is initiated and the engine is running. [8.20.20]

True or False?

A

True.

31
Q

During cruise flight, the maximum cabin altitude during normal operations is . [8.20.40]

A

6000 feet

32
Q

What cruise altitude is assumed if the cruise altitude from the FMC (while in AUTO pressurization) is unavailable? [8.20.40]

A

43,000 feet.

33
Q

If PECS coolant level servicing is recommended, what indication(s) do the pilots have of the condition? [8.20.30]

A
  • An RF indication by the quantity value on STATUS page
  • An amber indication for the quantity on the status page.
34
Q

The flight deck humidifier operates when the HUMID switch is ON and: [8.20.20]

A

Above 25,000 feet. The system automatically switches OFF approximately 1 - 1.5 hours prior to touchdown

35
Q

The CAC deflector doors may retract on the ground when the ambient air temperature is below 35°F or above 95°F. [8.20.20]

True or False?

A

True.

36
Q

Cabin airflow may be adjusted by the flight attendants on the ground before pushback using the Cabin Attendants Panel located at door 1L. [8.20.20]

True or False?

A

True.

37
Q

The Lower Recirculation System provides additional cabin cooling and helps reduce the power required by the CACs. [8.20.20]

True or False?

A

True.

38
Q

To increase cabin fresh air flow the LOWER RECIRC fans may be turned OFF. [8.20.20]

True or False?

A

False.

39
Q

A single CAC provides sufficient air to operate the associated pack in all operating modes. [8.20.20]

True or False?

A

True.

40
Q

When the cabin occupant information is entered on the cabin attendant panel, the following occurs: [8.20.20]

A

Adjusts the CAC power consumption, fuel burn, and humidity in the cabin.

41
Q

________ is the maximum takeoff and landing pressure altitude. [1.20.]

A

14,000 feet

42
Q

Pressurization system indications are automatically displayed on the EICAS when: [8.20.50]

A

A. AIR synoptic is displayed on any MFD.
B. Either outflow valve switch is in MAN.
C. EICAS message CABIN ALTITUDE is displayed.
D. Any of the above.

43
Q

When carrying live animals: [8.20.20]

A

Either the FWD or BULK compartments may be used.

UAL 787 SKV (15 decks)

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