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Boeing-737 Study Items > Air Systems > Flashcards

Air Systems Flashcards

1
Q

On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated?
A. a single channel controller failure has occurred
B. a dual channel controller failure has occurred
C. the aircraft is pressurizing to the departure airport

A

A. a single channel controller failure has occurred

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2
Q

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. to slowly depressurize the aircraft to 8,000 feet cabin altitude
B. to land at the arrival field elevation set in the LAND ALT window without further pilot inputs
C. to land at the takeoff field elevation without further pilot inputs

A

C. to land at the takeoff field elevation without further pilot inputs

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3
Q

Which stages of the compressor section is bleed air is obtained from?
A. 6th; 10th
B. 5th; 9th
C. 4th; 12th

A

B. 5th; 9th

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4
Q

The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient.
A. 9th
B. 10th
C. 7th

A

A. 9th

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5
Q

The engine bleed air valve is normally _____ operated and DC power activated.
A. hydraulically
B. electrically
C. pneumatically

A

C. pneumatically

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6
Q

What does the illumination of the BLEED TRIP OFF light indicate?
A. engine bleed air pressure is too low
B. engine bleed air temperature or pressure exceeds a predetermined limit
C. APU bleed air pressure is to low

A

B. engine bleed air temperature or pressure exceeds a predetermined limit

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7
Q

________when the BLEED TRIP OFF light illuminates?
A. The respective engine bleed air valve closes automatically
B. The respective engine bleed air valve must be manually closed
C. The APU bleed air valve closes automatically

A

A. The respective engine bleed air valve closes automatically

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8
Q

The ______ is/are sources of air that can be used to start the engine.
A. APU only
B. APU, ground air cart, engine bleed air, and ground air conditioning
C. APU, ground air cart, and engine bleed air

A

C. APU, ground air cart, and engine bleed air

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9
Q

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. in transit
B. open
C. closed

A

C. closed

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10
Q

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. open
B. closed
C. in transit

A

A. open

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11
Q

The APU bleed air switch affect the isolation valve position?
A. True
B. False

A

B. False

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12
Q

The APU bleed air valve is___ operated and ______ activated.
A. hydraulically; AC
B. pneumatically; DC
C. electrically; DC

A

B. pneumatically; DC

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13
Q

Engine thrust must be _______ with the DUAL BLEED light illuminated.
A. limited to idle
B. 40% N1 or greater
C. 60% N1 or greater

A

A. limited to idle

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14
Q

______causes a wing-body overheat condition.
A. a bleed air duct leak
B. a hydraulic leak in the spar
C. a fuel pump overheat

A

A. a bleed air duct leak

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15
Q

Which WING-BODY OVER HEAT light will illuminate if a leak in the bleed duct from the APU occurs?
A. Right
B. Left
C. Neither

A

B. Left

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16
Q

The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO.
A. automatically opens
B. automatically closes

A

B. automatically opens

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17
Q

Where does conditioned air for the cabin come from?
A. either the aircraft air conditioning system or heat exchanger located in the balance bay
B. either the aircraft air conditioning system or a preconditioned ground source
C. ram air

A

B. either the aircraft air conditioning system or a preconditioned ground source

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18
Q

Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck?
A. right pack
B. left pack
C. APU Pack

A

B. left pack

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19
Q

In the ________ air from the left pack, air from the right pack, and air from the recirculation system is combined.
A. aircraft cabin
B. the lavatory
C. mix manifold

A

C. mix manifold

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20
Q

On the ground, the APU can supply air for ________ for all operations.
A. two packs
B. the left pack only
C. the right pack only

A

A. two packs

21
Q

With the air conditioning PACK switches in AUTO and both packs are operating _________.
A. the left pack provides “normal air flow” and the right pack provides “high air flow”
B. the packs provide “high air flow”
C. the packs provide “normal air flow”

A

C. the packs provide “normal air flow”

22
Q

When one pack is operating, _________ with the air conditioning PACK switches in AUTO.
A. the operating pack shuts down above FL250
B. the operating pack provides low air flow
C. the operating pack provides high air flow

A

C. the operating pack provides high air flow

23
Q

The______ when the air conditioning PACK switch is in HIGH.
A. respective pack provides high air flow
B. respective pack provides low air flow
C. operating pack shuts down above FL250

A

A. respective pack provides high air flow

24
Q

Anytime the pack valve closes on the B737 -700, the air mix valves are driven to the _______ position automatically.
A. full cold
B. full hot
C. 20C

A

A. full cold

25
Q

In the automatic temperature mode on the B737 -700, the ________ are operated by the automatic temperature controller.
A. forward outflow valve
B. air mix valves
C. rear outflow valve

A

B. air mix valves

26
Q

The automatic temperature controller is bypassed when the temperature selector is positioned to ______ on the B737-700.
A.TEST
B. AUTO
C. MANUAL

A

C. MANUAL

27
Q

The ram air system is used to provide cooling for what part of the air conditioning systems?
A. APU
B. heat exchangers
C. hydraulic pumps

A

B. heat exchangers

28
Q

The RAM DOOR FULL OPEN light illuminates whenever the ram door is in which position?
A. fully open
B. fully closed
C. partially open

A

A. fully open

29
Q

A DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________ on a B737-700.
A. to 20C
B. full cold
C. full hot

A

B. full cold

30
Q

When a PACK TRIP OFF light illuminates, the pack valve ________ on the B737-700.
A. Must be manually opened
B. automatically opens and the mix valve drives full hot
C. automatically closes and the mix valve drives full cold

A

C. automatically closes and the mix valve drives full cold

31
Q

A PACK TRIP OFF is caused by _________ in a B737-700.
A. duct pressure exceeding limits
B. low pack pressure
C. pack temperatures exceeding limits

A

C. pack temperatures exceeding limits

32
Q

In a B737-800, _______ if an amber ZONE TEMP light illuminates?
A. the MASTER CAUTION light will illuminate, and the pack valve will go full cold
B. the MASTER CAUTION light will illuminate, and both packs will trip off
C. the MASTER CAUTION light will illuminate, and the trim air valve closes

A

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

33
Q

The recirculation fan system __________ the engine bleed air demand and air conditioning load.
A. reduces
B. decrease
C. has no effect on

A

A. reduces

34
Q

_______makes the equipment cooling OFF light illuminate?
A. placing the equipment cooling fan in alternate
B. loss of air flow due to failure of an equipment cooling fan
C. loss of the left pack in flight

A

B. loss of air flow due to failure of an equipment cooling fan

35
Q

What does the TRIP RESET switch reset?
A. DUCT OVERHEAT on the B737-700, or the ZONE TEMP on the B737-800
B. BLEED TRIP OFF, PACK TRIP OFF
C. all answers are correct

A

C. all answers are correct

36
Q

On the B737-800, what is indicated by the PACK light?
A. a pack trip off and the valve has driven to full hot
B. a pack trip off or failure of both primary and standby pack controls
C. all answers are correct

A

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

37
Q

The aircraft is pressurized by bleed air supplied to and distributed by which system?
A. the air conditioning system
B. the hydraulic system
C. all answers are correct

A

A. the air conditioning system

38
Q

Cabin air outflow controlled by______.
A. the outflow valve and the overboard exhaust valve
B. the equipment cooling exhaust system
C. forward outflow valve

A

A. the outflow valve and the overboard exhaust valve

39
Q

On the Cabin Pressurization Panel, how does the MAN mode controls aircraft pressurization?
A. automatically
B. manually by setting the FLT ALT and LAND ALT with the predetermined chart
C. manually by the Outflow Valve switch

A

C. manually by the Outflow Valve switch

40
Q

On the Cabin Pressurization Panel, with the pressurization mode selector in the MAN mode, the outflow valve switch takes approximately how long to move the outflow valve in the full range of motion?
A. 20 seconds
B. 60 seconds
C.25 seconds

A

A. 20 seconds

41
Q

On the Cabin Pressurization Panel, what does an illuminated amber AUTO FAIL light indicate?
A. automatic pressurization system failure is detected
B. the aircraft is pressurizing to the departure airport
C. the landing altitude needs to be reset

A

A. automatic pressurization system failure is detected

42
Q

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. one
B. six
C. three

A

C. three

43
Q

On the cabin altitude panel, the ________on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the cabin altitude in feet.
A. lower scale
B. outer scale
C. inner scale

A

C. inner scale

44
Q

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. lower scale
B. outer scale
C. inner scale

A

B. outer scale

45
Q

The intermittent cabin altitude warning horn can be cut out ______.
A. By pushing the Altitude (ATL) HORN CUTOUT Switch
B. By pushing the FIRE WARNING Bell Cutout
C. By pushing the MASTER CAUTION push to rest

A

A. By pushing the Altitude (ATL) HORN CUTOUT Switch

46
Q

At _______ cabin altitude the intermittent cabin altitude warning will sound.
A. 10,000 feet
B. 14,000 feet
C. 9,000 feet

A

A. 10,000 feet

47
Q

Cabin rate of climb displayed ______.
A. by accessing the FMC Cabin Altitude page
B. on the cabin rate of climb indicator
C. by calculating the split between CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator

A

B. on the cabin rate of climb indicator

48
Q

On the Cabin Pressurization Panel, _______modes automatically pressurize the aircraft.
A. AUTO & ALTN
B. AUTO & MAN
C. AUTO, ALTN & MAN

A

A. AUTO & ALTN

49
Q

On the B737-700, will the pack valve close if the cooling cycle overheats and is associated with a PACK TRIP OFF light.
A. Yes
B. No

A

A. Yes

Boeing-737 Study Items (15 decks)

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