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AAL 737 > Air Conditioning > Flashcards

Air Conditioning Flashcards

1
Q

The ram air doors normally modulate to full OPEN when the aircraft is ____.

a. in flight with flaps not fully retracted or on the ground
b. on the ground only
c. in flight with flaps retracted
d. operating both packs in high flow

A

A. in flight with flaps not fully retracted or on the ground

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2
Q

The APU can supply bleed air for the pack up to ____.

a. 20,000 feet or 8000 feet if the APU is also providing electricity
b. 17,000 feet or 10,000 feet if the APU is also providing electricity
c. 20,000 feet or 12,000 feet if the APU is also providing electricity
d. 41,000 feet under all conditions

A

B. 17,000 feet or 10,000 feet if the APU is also providing electricity

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3
Q

The mix manifold receives air from the ____.

a. left pack, right pack, recirculation fan, and pre-conditioned air
b. left pack, right pack, and pre-conditioned air only
c. left pack and right pack only
d. right pack, recirculation fan, and pre-conditioned air only

A

A. left pack, right pack, recirculation fan, and pre-conditioned air

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4
Q

What is the primary source of conditioned air for the cockpit?

a. Right pack
b. Left pack
c. Mix manifold
d. Both packs

A

B. Left pack

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5
Q

The primary purpose of the recirculation fans is to ____.

a. increase airflow at greater cabin differential pressure
b. provide overheat detection downstream of the packs
c. reduce air conditioning pack load
d. filter air for contaminants

A

C. reduce air conditioning pack load

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6
Q

Equipment cooling is provided for electronic equipment in the ____.

a. E & E bay and flight deck area
b. E & E bay and aft cargo compartment
c. E & E bay only
d. E & E bay and forward cargo compartment

A

A. E & E bay and flight deck area

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7
Q

The equipment cooling system has ___________ fan(s).

a. 1 supply and 2 exhaust
b. 2 supply and 2 exhaust
c. 1 supply and 1 exhaust
d. 2 supply and 1 exhaust

A

B. 2 supply and 2 exhaust

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8
Q

Air from the preconditioned ground source enters the air conditioning system through the ____.

a. bleed valve
b. right pack valve
c. mix manifold
d. left pack valve

A

C. mix manifold

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9
Q

Engine low pressure bleed air is provided by the ____ stage, and engine high pressure bleed air is provided by the ____ stage air.

a. 5th/12th
b. 5th/9th
c. 9th/13th
d. 8th/12th

A

B. 5th/9th

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10
Q

Each A/C pack has ____ controllers for pack temperature control.

a. 1
b. 2
c. 3
d. 4

A

B. 2

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11
Q

If the primary equipment cooling fan fails, what indications would be displayed?

a. No indications - the standby fan turns on automatically.
b. Master Caution light, the related equipment cooling OFF light, and the OVERHEAD annunciator light on the System Annunciator Panel
c. Master Caution light and horn
d. Warning horn only (Ground Ops)

A

B. Master Caution light, the related equipment cooling OFF light, and the OVERHEAD annunciator light on the System Annunciator Panel

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12
Q

In the event of a single pack failure at altitude, the remaining pack is capable of maintaining cabin pressure and comfort at an airplane altitude of _____.

a. 35,000 feet
b. 41,000 feet
c. 37,000 feet
d. 25,000 feet

A

B. 41,000 feet

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13
Q

The APU will supply bleed air for ____ pack(s) ____.

a. one, only in flight
b. both, on the ground
c. all three, in flight
d. both 1 & 2

A

D. both Packs 1 & 2

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14
Q

Inflight, normal air conditioning system operation would be ____.

a. one pack from two engine bleed sources
b. two packs from one engine bleed source
c. both packs from APU
d. each pack from its associated engine bleed source

A

D. each pack from its associated engine bleed source

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15
Q

Which single bleed source is permitted to supply air to both packs on the ground?

a. Engine only
b. The APU only
c. An engine bleed or APU
d. None

A

B. The APU only

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16
Q

The ram air system operates automatically to provide cooling for ____.

a. emergency cooling needs
b. the E & E compartment on the ground
c. the heat exchangers
d. the right pack alternate air source

A

C. the heat exchangers

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17
Q

For maximum cooling (of the pack) the ram air inlet doors modulate toward the _________.

a. full closed position
b. full open position
c. mid position
d. ram air inlet doors do not modulate

A

B. full open position

18
Q

Deflector doors on the ram air system are used on the ground to __________.

a. increase airflow through the ram air doors
b. prevent slush ingestion on takeoff or landing
c. allow for smooth air flow over the heat exchangers
d. prevent backflow of air over the heat exchangers

A

B. prevent slush ingestion on takeoff or landing

19
Q

The deflector doors on the ram air system are fully extended ____.

a. inflight with the gear extended
b. inflight with the flaps extended
c. on the ground only
d. on the ground, or inflight with the flaps extended

A

C. on the ground only

20
Q

Zone temperature is controlled by introducing the proper amount of trim air into the__________.

a. the mix manifold
b. individual zone supply duct
c. the pack temp control valve
d. modulating the ram air inlet doors

A

B. individual zone supply duct

21
Q

Failure of the primary and standby flight deck zone temperature controls will cause the ____ to illuminate

a. MASTER CAUTION light only
b. ZONE TEMP light only
c. ZONE TEMP, MASTER CAUTION, and AIR COND annunciator lights
d. PACK light

A

C. ZONE TEMP, MASTER CAUTION, and AIR COND annunciator lights

22
Q

Inflight, the forward cargo compartment is heated by air drawn around it by the ____.

a. outflow valves
b. recirculation fan system
c. equipment cooling system
d. Both B and C

A

D. Both B and C

Recirculation Fan System and the Equipment cooling system

23
Q

The temperature selector adjusts the desired zone temperature between a range of approximately ____ degrees.

a. 70-80
b. 75-85
c. 65-85
d. 60-80

A

C. 65-85

24
Q

When either the primary or standby pack temperature controller fails, what indications will be displayed?

a. PACK and MASTER CAUTION lights only
b. MASTER CAUTION, and AIR COND SYSTEM ANNUNCIATOR lights
c. PACK, MASTER CAUTION, and AIR COND SYSTEM ANNUNCIATOR lights on recall
d. PACK and ZONE TEMP lights

A

C. PACK, MASTER CAUTION, and AIR COND SYSTEM ANNUNCIATOR lights on recall

25
Q

If the FWD or AFT cabin ZONE TEMP lights illuminate indicating an overheat this will cause the associated ____ valve to close.

a. emergency relief
b. pressure regulating
c. trim air modulating
d. pack

A

C. trim air modulating

26
Q

The associated PACK light, Master Caution, and AIR COND annunciator will illuminate when ______.

a. pack controller failure and all temperature selectors placed OFF
b. pack overheats or dual pack controller failure
c. pack trips caused by primary controller failure
d. all temperature selectors are placed OFF

A

B. pack overheats or dual pack controller failure

27
Q

What fault indications cannot be reset with the trip reset button?

a. PACK
b. Wing body overheat
c. BLEED TRIP OFF
d. ZONE TEMP

A

B. Wing body overheat

28
Q

The ZONE TEMP light, Master Caution, and AIR COND annunciator lights will illuminate for ____

a. an overheat in the duct leading to any of the three zones
b. a dual temperature controller failure in the CONTROL CAB zone
c. any single temperature controller failure in any zone during a RECALL test
d. any of the above

A

D. Any of the Above

a. an overheat in the duct leading to any of the three zones
b. a dual temperature controller failure in the CONTROL CAB zone
c. any single temperature controller failure in any zone during a RECALL test
d. any of the above

29
Q

At the same time this light illuminates, what other indications do you get?

a. Only the Master Caution light will illuminate.
b. AIR COND will illuminate on the left System Annunciator Panel.
c. The right System Annunciator Panel will illuminate AIR COND on recall only.
d. The Master Caution light illuminates and the right System Annunciator Panel shows AIR COND.

A

D. The Master Caution light illuminates and the right System Annunciator Panel shows AIR COND.

30
Q

Both this light and the Master Caution lights are illuminated. What happens to the Left pack?

a. If both the Primary and Standby left pack controls fail, then the left pack valve automatically closes.
b. The left pack valve will stay open even if the left pack overheats.
c. The left pack valve will close if sensors detected excessive temperature in that pack.
d. The left pack valve closes due to pack overpressure

A

C. The left pack valve will close if sensors detected excessive temperature in that pack.

31
Q

Inflight, with the left pack valve closed due to excessive temperature, what other actions automatically occur in the Air Conditioning System?

a. The right pack switches to “high air flow” if flaps are up.
b. The right pack switches to “high air flow’’ regardless of flap position.
c. The right pack switches to “high air flow” only if flaps are extended.
d. The right pack stays at “normal air flow” rate un1il the left Engine Bleed Air Switch is selected OFF.

A

A. The right pack switches to “high air flow” if flaps are up.

32
Q

What caused this light to illuminate? The Master Caution lights and the AIR COND light on the System Annunciator Panel also illuminate.

a. An overheat has occurred in the AFT Cabin trim air supply duct, and the associated trim air modulating valve opened
b. An overheat has occurred in the AFT Cabin trim air supply duct, and the associated trim air modulating valve closed.
c. The AFT zone temperature control failed.
d. The Right Electronic Controller has failed

A

B. An overheat has occurred in the AFT Cabin trim air supply duct, and the associated trim air modulating valve closed.

33
Q

What is now controlling the right Air Conditioning Pack output temperature?

a. The right pack output temperature is now controlled by the AFT temp controller only.
b. The right pack output temperature is now controlled by the FWD temp controller only.
c. The right pack output temperature is now controlled by the average setting of the FWD and AFT Cabin Temperature controllers.
d. The right pack output temperature cannot be controlled

A

C. The right pack output temperature is now controlled by the average setting of the FWD and AFT Cabin Temperature controllers.

34
Q

What effect will this condition have on the left pack?

a. The left pack will produce the coldest of the three controllers.
b. The left pack will produce the average of the FWD and AFT cabin temp controllers.
c. The left pack will produce the coldest of the FWD and AFT cabin temp controllers.
d. The left pack output will be controlled by the CONT CAB temp controller.

A

D. The left pack output will be controlled by the CONT CAB temp controller

35
Q

If this light illuminated only on Recall. ____.

a. both the Primary and Back-Up Flight Deck Zone Temperature Controllers have failed
b. only one of the CONT CAB Zone Temperature Controllers has failed
c. both the Right and Left Electronic Controllers have failed
d. An overheat has occurred in the CONT Cabin Trim Air Supply Duct and the associated Trim Air Modulating Valve closed

A

B. only one of the CONT CAB Zone Temperature Controllers has failed

36
Q

This light illuminated only during Recall and the TRIM AIR Switch is selected ON. Which statement, below, most accurately describes flight deck air conditioning operation.

a. The CONT CAB Trim Air Valve is stuck full open.
b. One of the CONT CAB Zone Temperature Controllers has failed.
c. The left pack produces an air temperature that satisfies the setting controlled by the CONT CAB. Temperature Selector.
d. The Aft Cabin Zone Temperature Control Valve is stuck full open.

A

B. One of the CONT CAB Zone Temperature Controllers has failed.

37
Q

If this light illuminated due to an overheat condition in the applicable zone supply duct, the Master Caution Lights will also illuminate; and ____.

a. the AFT CAB trim air modulating valve closes
b. the FWD CAB trim air modulating valve closes
c. the CONT CAB trim air modulating valve closes
d. none of the trim air modulating valves close

A

C. the CONT CAB trim air modulating valve closes

38
Q

With this configuration, what temperatures do the packs command?

a. The left pack produces an output of 75 degrees and the right pack produces an output of 65 degrees.
b. The temperature selectors are ignored.
c. Packs produce an air temperature that satisfies the zone which requires the most cooling.
d. Temperatures are averaged for each pack output.

A

C. Packs produce an air temperature that satisfies the zone which requires the most cooling.

39
Q

With this configuration what temperatures do the packs command?

a. Temperatures have an averaged output.
b. The Forward cabin temperature selector is ignored.
c. Left pack produces 75 degrees, right pack produces 65 degrees.
d. The system is unaffected.

A

B. The Forward cabin temperature selector is ignored.

40
Q

With all the temperature selectors positioned to OFF, the packs will adjust for cabin demand. In this case, which statement is most correct?

a. The pack outputs will average.
b. The left pack outputs will adjust for a demand of 75 degrees, and the right pack output will adjust for a demand of 65 degrees.
c. The left pack outputs will adjust for a demand of 65 degrees, and the right pack output will adjust for a demand of 85 degrees.
d. System operation is normal

A

B. The left pack outputs will adjust for a demand of 75 degrees, and the right pack output will adjust for a demand of 65 degrees.

41
Q

Placing the trim air switch off will:

a. Cause both packs switch to high flow.
b. Cause the trim pressure regulating and shutoff valve
c. Cause the left pack temperature to be controlled by the Cont Cab temp selector and the right pack by the Fwd and Aft temp selectors.
d. Both b & c are correct

A

D. Both B and C are correct.
Cause the trim pressure regulating and shutoff valve
cause the left pack temperature to be controlled by the Cont Cab temp selector and the right pack by the fwd and aft temp selectors.

42
Q

While accomplishing the QRH procedure for a PACK light illuminated, why do you select a warmer temperature on all three temperature selectors?

a. Reduce the workload on the affected air conditioning pack
b. This causes the pack to revert to high flow
c. Open the pack valve
d. To extinguish the Pack light

A

A. Reduce the workload on the affected air conditioning pack

AAL 737 (32 decks)

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