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United 737 Systems Validation Study Guide (26 July 2021) > Air Systems/Pneumatics/Air Conditioning/Pressurization > Flashcards

Air Systems/Pneumatics/Air Conditioning/Pressurization Flashcards

1
Q
  1. On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated?
A
  1. On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated?

• a single channel controller failure has occurred

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2
Q
  1. The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. What does the controller program the cabin to?
A
  1. The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. What does the controller program the cabin to?

• to land at the takeoff field elevation without further pilot inputs

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3
Q
  1. Which stages of the compressor section is bleed air is obtained from (NG aircraft)?
A
  1. Which stages of the compressor section is bleed air is obtained from (NG aircraft)?

• 5th; 9th

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4
Q
  1. The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient (NG aircraft).
A
  1. The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient (NG aircraft).

• 9th

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5
Q
  1. The engine bleed air valve is normally _____ operated and DC power activated.
A
  1. The engine bleed air valve is normally _____ operated and DC power activated.

• pneumatically

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6
Q
  1. What does the illumination of the BLEED TRIP OFF light indicate?
A
  1. What does the illumination of the BLEED TRIP OFF light indicate?

• engine bleed air temperature or pressure exceeds a predetermined limit

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7
Q
  1. When the BLEED TRIP OFF light illuminates, what effect does this have on the engine bleed air system?
A
  1. When the BLEED TRIP OFF light illuminates, what effect does this have on the engine bleed air system?

• The respective engine bleed air valve closes automatically

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8
Q
  1. The isolation valve is _____ when the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH.
A
  1. The isolation valve is _____ when the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH.

• closed

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9
Q
  1. The isolation valve is _____ when the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF.
A
  1. The isolation valve is _____ when the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF.

• open

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10
Q
  1. Turning the APU bleed air switch OFF with the PACK switches in AUTO will cause the isolation valve to open.
A
  1. Turning the APU bleed air switch OFF with the PACK switches in AUTO will cause the isolation valve to open.

• False

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11
Q
  1. The APU bleed air valve is___ operated and ______ activated.
A
  1. The APU bleed air valve is___ operated and ______ activated.

• pneumatically; DC

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12
Q
  1. Engine thrust must be _______ with the DUAL BLEED light illuminated.
A
  1. Engine thrust must be _______ with the DUAL BLEED light illuminated.

limited to idle

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13
Q
  1. ______causes a WING-BODY OVERHEAT condition.
A
  1. ______causes a WING-BODY OVERHEAT condition.

• a bleed air duct leak

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14
Q
  1. Which WING-BODY OVERHEAT light will illuminate if a leak in the bleed duct from the APU occurs?
A
  1. Which WING-BODY OVERHEAT light will illuminate if a leak in the bleed duct from the APU occurs?

• Left

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15
Q
  1. The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO.
A
  1. The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO.

• automatically opens

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16
Q
  1. Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck?
A
  1. Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck?

• left pack

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17
Q
  1. Air from the left pack, air from the right pack, and air from the recirculation system is combined within the _______.
A
  1. Air from the left pack, air from the right pack, and air from the recirculation system is combined within the _______.

• mix manifold

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18
Q
  1. On the ground, the APU can supply air for ________ for all operations.
A
  1. On the ground, the APU can supply air for ________ for all operations.

• two packs

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19
Q
  1. With the air conditioning PACK switches in AUTO and both packs are operating _________.
A
  1. With the air conditioning PACK switches in AUTO and both packs are operating _________.

• the packs provide “normal air flow”

20
Q
  1. When one pack is operating, _________ with the air conditioning PACK switches in AUTO.
A
  1. When one pack is operating, _________ with the air conditioning PACK switches in AUTO.

• the operating pack provides high air flow

21
Q
  1. Anytime the pack valve closes on the B737 -700, the air mix valves are driven to the _______ position automatically.
A
  1. Anytime the pack valve closes on the B737 -700, the air mix valves are driven to the _______ position automatically.

• full cold

22
Q
  1. In the automatic temperature mode on the B737 -700, the ________ are operated by the automatic temperature controller.
A
  1. In the automatic temperature mode on the B737 -700, the ________ are operated by the automatic temperature controller.

• air mix valves

23
Q
  1. The automatic temperature controller is bypassed when the temperature selector is positioned to ________ on the B737-700,
A
  1. The automatic temperature controller is bypassed when the temperature selector is positioned to ________ on the B737-700,

• MANUAL

24
Q
  1. The ram air system is used to provide cooling for what part of the air conditioning systems?
A
  1. The ram air system is used to provide cooling for what part of the air conditioning systems?

• heat exchangers

25
Q
  1. A DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________ on a B737-700.
A
  1. A DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________ on a B737-700.

• full cold

26
Q
  1. When a PACK TRIP OFF light illuminates, the pack valve ________ on the B737-700.
A
  1. When a PACK TRIP OFF light illuminates, the pack valve ________ on the B737-700.

• automatically closes and the mix valve drives full cold

27
Q
  1. In a B737-800, _______ if an amber ZONE TEMP light illuminates?
A
  1. In a B737-800, _______ if an amber ZONE TEMP light illuminates?

• the MASTER CAUTION light will illuminate, and the trim air valve closes

28
Q
  1. The recirculation fan system __________ the engine bleed air demand and air conditioning load.
A
  1. The recirculation fan system __________ the engine bleed air demand and air conditioning load.

• reduces

29
Q
  1. What does the TRIP RESET switch reset?
A
  1. What does the TRIP RESET switch reset?

all answers are correct

  • *• DUCT OVERHEAT on the B737-700, or the ZONE TEMP on the B737-800**
  • *• BLEED TRIP OFF, PACK TRIP OFF**
30
Q
  1. On the B737-800, what is indicated by the PACK light?
A
  1. On the B737-800, what is indicated by the PACK light?

• a pack trip off or failure of both primary and standby pack controls

31
Q
  1. Cabin air outflow controlled by______.
A
  1. Cabin air outflow controlled by______.

• the outflow valve and the overboard exhaust valve

32
Q
  1. On the Cabin Pressurization Panel, what does an illuminated amber AUTO FAIL light indicate?
A
  1. On the Cabin Pressurization Panel, what does an illuminated amber AUTO FAIL light indicate?

• automatic pressurization system failure is detected

33
Q
  1. Manually positioning the outflow valve to OPEN will cause cabin altitude to _________.
A
  1. Manually positioning the outflow valve to OPEN will cause cabin altitude to _________.

• Climb

34
Q
  1. The main outflow valve is the overboard exhaust exit for the majority of the air circulated through the passenger cabin and is actuated by one of _____ DC motors and
A
  1. The main outflow valve is the overboard exhaust exit for the majority of the air circulated through the passenger cabin and is actuated by one of _____ DC motors and

• three

35
Q
  1. On the cabin altitude panel, the ________on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the cabin altitude in feet.
A
  1. On the cabin altitude panel, the ________on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the cabin altitude in feet.

• inner scale

36
Q
  1. On the cabin altitude panel, the _______ on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the differential pressure between cabin and ambient in psi.
A
  1. On the cabin altitude panel, the _______ on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the differential pressure between cabin and ambient in psi.

• outer scale

37
Q
  1. The intermittent cabin altitude warning horn can be cut out ______.
A
  1. The intermittent cabin altitude warning horn can be cut out ______.

• By pushing the Altitude (ATL) HORN CUTOUT Switch

38
Q
  1. At _______ cabin altitude the intermittent cabin altitude warning will sound.
A
  1. At _______ cabin altitude the intermittent cabin altitude warning will sound.

• 10,000 feet

39
Q
  1. Cabin rate of climb displayed ______.
A
  1. Cabin rate of climb displayed ______.

• on the cabin rate of climb indicator

40
Q
  1. On the Cabin Pressurization Panel, _______modes automatically pressurize the aircraft.
A
  1. On the Cabin Pressurization Panel, _______modes automatically pressurize the aircraft.

• AUTO & ALTN

41
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. Does the APU bleed air valve, on the B737-800, automatically close when the APU is shut down?

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. Does the APU bleed air valve, on the B737-800, automatically close when the APU is shut down?

Yes

42
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. In a B737-700, a PACK TRIP OFF is caused by _________.

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. In a B737-700, a PACK TRIP OFF is caused by _________.

pack temperatures exceeding limits

43
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. The Wing-Body Overheat (OVHT) TEST switch _____________.

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. In a B737-700, a PACK TRIP OFF is caused by _________.

all answers are correct

  • illuminates both WING-BODY OVERHEAT lights
  • tests wing-body overheat detector circuit
44
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. On the Cabin Pressurization Panel, with the pressurization mode selector in the MAN mode, the outflow valve switch takes approximately _______ to move the outflow valve in the full range of motion.

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. On the Cabin Pressurization Panel, with the pressurization mode selector in the MAN mode, the outflow valve switch takes approximately _______ to move the outflow valve in the full range of motion.

20 seconds

45
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. Conditioned air for the cabin comes from _________________.

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. Conditioned air for the cabin comes from _________________.

either the aircraft air conditioning system or a preconditioned ground source

46
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. What are the required immediate action items for a cabin altitude warning horn inflight?

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. What are the required immediate action items for a cabin altitude warning horn inflight?

  1. Oxygen Masks & Regulators…ON & 100%
  2. Crew Communications…Establish
  3. Seatbelt Sign….ON
47
Q

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. On the Cabin Pressurization Panel, the MAN mode controls aircraft pressurization _____________.

A

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21)

xx. On the Cabin Pressurization Panel, the MAN mode controls aircraft pressurization _____________.

manually by the Outflow Valve switch

United 737 Systems Validation Study Guide (26 July 2021) (14 decks)

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