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United 737 D Cards > Air Systems > Flashcards

Air Systems Flashcards

1
Q

On the Cabin pressure panel which mode automatically pressurizes the aircraft
A AUTO, ALTN, & MAN
B AUTO & MAN
C AUTO & ALTN

A

C AUTO & ALTN

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2
Q

The OFF SCHED DECENT light illuminates the aircraft begin decent before having reached the planned cruise altitude. The controller programs the cabin________
A to land at the takeoff field elevation without further pilot inputs
B too slow, slowly, depressurize the aircraft to 8,000 cabin altitude
C to land at the arrival field elevation set in the landing altitude window without further pilot input

A

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

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3
Q

On the B737–700 anytime the pack valve closes the air mixing valves are driven______ position automatically
A 20C
B full hot
C full cold

A

C full cold

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4
Q

The engine bleeder valve is normally DC power activated and_____ operated
A pneumatically
B electrically
C hydraulically

A

A pneumatically

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5
Q

On the Cabin altitude panel, which scale of the Cabin altitude/differential pressure indicates the cabin altitude in feet
A lower scale
B outer scale
C inner scale

A

C inner scale

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6
Q

With dual bleed, light eliminated engine thrust must be_______
A 40% N1 or greater
B limited to idle
C 60% in one great

A

B limited to idle

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7
Q

What are the required immediate action items for cabin altitude, warning horn light?
A oxygen mask and regulators..on & 100%
altitude Horn cut out. press
B oxygen mask and regulators on & 100%
Crew communication. Establish.
Seatbelt sign. On.
C

A

B oxygen mask and regulators on & 100%
Crew communication. Establish.
Seatbelt sign. On.

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8
Q

Conditioned air from the_____ upstream of the mix manifold flows directly to the flight deck
A left pack
B APU pack
C right pack

A

A left pack

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9
Q

When fifth low stage pressure is insufficient the ______ high stage Val modulates open to maintain proper pressure
A 8th
B 10th
C 9th

A

C 9th

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10
Q

The main outflow valve is actuated by one of_______ DC motors and is the overhead exhaust exit for the majority of the air circulated through the passenger cabin
A three
B two
C six

A

A three

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11
Q

The wing body overheat test switch_______

A test wing body overheat detector circuit
B illuminates, both wing body overheat lights
C all answers are correct

A

C all answers are correct

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12
Q

Does the APU bleed air valve on the 737 800 automatically close when the APU is shut down?
A no
B yes

A

B yes

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13
Q

With the isolation valve switch and auto both engine, bleed air switches on and both air-conditioning pack switches auto or high. The ice civilization valve is.
A closed
B open
C in transit

A

A closed

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14
Q

On the 737 800 the PAC light indicates____
A a pack trip off, and the valve has driven full hot
B pack trip off or failure of both primary and standby pack controls
C all answers are correct

A

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

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15
Q

What precools engine bleed air
A a pre-cooler or heat exchanger
B they respective pack
C hydraulic heat exchanger

A

A a pre-cooler or heat exchanger

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16
Q

Bleed air obtain from the_____ & _____ stages of the compressor section of the engine
A 5th&9th
B 6th&10th
C 4th&12th

A

A 5th&9th

17
Q

On the Cabin pressure panel if both the Amber auto fail, light and green a LTN light is illuminated______
A a dual controller failure has occurred
B the aircraft is pressurizing to the departure altitude
C a single channel controller failure has occurred

A

C a single channel controller failure has occurred

18
Q

With the air-conditioning PACK switches in AUTO and one pack is operating_____
A the operating pack provides low air pressure
B the operating pack shuts down above FL 250
C the operating provides high airflow

A

C the operating provides high airflow

19
Q

In the Boeing 737 700 A PACk TRIP off is caused by_______
A low pack pressure
B pack temperature exceeding limits
C duct pressure exceeds limits

A

B pack temperature exceeding limits

20
Q

Conditioned air for the cabin comes____
A either the aircraft air conditioning system or a preconditioned ground source
B either the aircraft air conditioning system or heat exchanger located in the balance bay
C Ram air

A

A either the aircraft air conditioning system or a preconditioned ground source

21
Q

On the B 737, 700 and the automatic temperature mode_____ are operated by the automatic temperature controller
A forward outflow valve
B Air mix valves
C rear outflow valve

A

B Air mix valves

22
Q

If a leak and they bleed air duct from the APU occurs, which wing body overheat light will illuminate
A neither
B right
C Left

A

C Left

23
Q

On the cabin pressurization panel with the pressurization mode, selector in the main mode, the outflow valve takes_____ to move the outflow valve to full range of motion
5 seconds
60 seconds
20 seconds

A

20 seconds

24
Q

What occurs when the bleed trip off light illuminates
A the respective engine, bleed, closes automatically
B they respective engine, bleed, air valve must be manually closed
C the APU bleed air valve closes automatically

A

A the respective engine, bleed, closes automatically

25
Q

On the cabin altitude panel, which scale of the cabin altimeter/differential pressure indicator indicates the differential pressure between the cabin and the ambient and PSI
A lower scale
B outer scale
C inner scale

A

B outer scale

26
Q

On the Boeing 737 700 when a pack trip off light illuminates the PACK valve
A must be manually opened
B automatically closes and the mix valve drives full cold
C automatically opens and they mix valve drives full cold

A

B automatically closes and the mix valve drives full cold

27
Q

The TRIP RESET switch resets the______
A duck overheat on the 737 700 or the zone temp on the 737 800
B bleed trip off or pack trip off
C all answers are correct

A

C all answers are correct

28
Q

On the 737-700 the automatic tip controller is bypassed when the temperature selector is positioned to the_____
Manual
Auto

A

Manual

29
Q

On the Cabin pressure panel, the manual mode controls aircraft pressurization____
A automatically
B manually by setting the FLT ALT and LAN ALT with the predetermined chart
C manually by the outflow valve switch

A

C manually by the outflow valve switch

30
Q

What causes a wing body overheat condition?
A a hydraulic leak in the spar
B a bleed air duct leak
C a fuel pump overheat

A

B a bleed air duct leak

31
Q

The recirculation fan system_______ the air conditioning load and engine, bleed air demand
A reduces
B has not affect on
C increases

A

A reduces

32
Q

At what cabin altitude will the intermittent cabin altitude, warning sound?
A 14,000
B 10,000
C 9,000

A

B 10,000

United 737 D Cards (13 decks)

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