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A320 > A320 ATA 21 Air Cond. > Flashcards

A320 ATA 21 Air Cond. Flashcards

1
Q

During descent the controller mantains a cabin rate to equal cabin pressure to landing field pressure with a maximum descent rate of?

A

750ft/min

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2
Q

“Hot air fault” light illuminates on the air conditioning panel

A

The hot air pressure regulator valve closes and the trim air valve closes automatically

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3
Q

In normal flight, the avionics ventilation system controls the temperature of the cooling air by?

A

Passing air through a skin heat exchanger

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4
Q

Temperature regulation is automatic and controlled by?

A

One zone controller and two packs controller (MSN 2472 older)
Two ACSC (Air conditioning system controllers) MSN 2736 New

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5
Q

Optimized temperature regulation

A

The system optimizes the temperature acting on the trim air valves

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6
Q

The Packs Ram air inlet flaps close during T/O and LDG to avoid ingestion of foreing matter
True or False?

A

True in ALL FLEET

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7
Q

THE EMERGENCY RAM AIR PUSHBUTTON IS ON.
-RAM AIR VALVE opens ONLY if ditching is selected.
-OUTFLOW VALVE opens about 50% only if it is under manual control
- We always have EMERGENCY RAM AIR flowing to the mixer unit regardless of diff. pressure.
Which are True or False?

A

All are false

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8
Q

“HOT AIR” pressure regulator valve failed open. Is there any effect?

A

No effect

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9
Q

BLEED AIR supplied from the APU (APU BLEED VALVE OPEN), The pack flow is automatically selected in which mode?
High, normal, low…?

A

High

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10
Q

TRIM AIR valve adjust temperature by?
-Adding hot air
-Adding cold fresh air
-Modulating the pack flow control valve
-Mixing recirculated cabin air

A

Adding HOT AIR

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11
Q

The “HOT AIR” pressure regulating valve:

A

Regulates the pressure of hot air tapped upstream of the packs

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12
Q

PACK FLOW CONTROL VALVE its —– operated and —— controlled

A

Pneumatically operated
Electrically controlled

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13
Q

The zone temperature selectors are located in?

A

Cockpit in the overhead panel

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14
Q

Engine bleed press. demand, when the cooling demand in one zone cannot be satisfied, what happens with the idle?

A

Minimum idle is increased automatically

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15
Q

TRIM AIR valves are controlled by?

A

Zone controller or the ACSC on MSN higher than 2736

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16
Q

The MIXER UNIT is connected to?

A

Packs, recirculated cabin air, emergency ram air inlet and LP ground inlets

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17
Q

Should the ECAM display “AIR COND CTL 1(2) - A (B) FAULT in models MSN’ higher than 2736?
What does it mean?

A

Lane A(B) of ACSC 1(2) fails.

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18
Q

Should the ECAM display on ground “VENT AVNCS SYS FAULT”

A

Flight Crew should perform the ECAM actions and, previous to the STATUS review, refer to QRH to perform the AEVC System Reset

19
Q

The PACK FLOW control valce closes AUTOMATICALLY in case of:

A

Pack overheat in ground, engine start or operation of the fire or ditching push button.

20
Q

If pack controller fails (PRIMARY AND SECONDARY CHANNEL), the OUTLET PACK temperature is pneumatically regulated at what temperature?

A

Between 5ºC and 30ºC in a max. of 6 min.

21
Q

What statements about the Air Conditioning System Controllers (ACSC) are correct?
-ACSC 1 regulates cockpit temp, ACSC 2 regulates the temp. of the 2 cabin zones
-Each ACSC has 2 lanes.
-1 Lane failure of 1 ACSC has no effect.

A

All are CORRECT

22
Q

APU BLEED AIR, the zone controller or the ACSC sends a demand signal to increase the APU flow when a zone temperature cannot be satisfied. Where is this signal sent to?

A

APU ECB (electronic control box)

23
Q

The DITCHING switch when selected sends a closure signal to?
-Outflow valve
-Emergency RAM air inlet, the avionics inlet and extract valves
-Pack flow control valves.

A

ALL CORRECT

24
Q

In flight, if cabin pressure controller CPC n.1 fails?

A

It transfers auto to CPC n.2

25
Q

The OUTFLOW valve is powered by?

A

Either of the THREE electric motors

26
Q

Airplane on ground after landing for more than 55s, the outflow valve is in what position?

A

Fully open

27
Q

When the RAM AIR pb is ON, if it is under automatic control the system will drive the outflow about 50% open if diff. pressure is below —PSI.

A

Below 1 PSI

28
Q

The function of the safety valves is to avoid?

A

Cabin pressure going too high 8.6PSI or going too low 1 PSI

29
Q

When LDG elevation is AUTO, the system uses FMGC data to construct and optimez a Pressure schedule. True or False?

A

True

30
Q

On ECAM CABIN PRESS page, the OUTFLOW indicatior changes to AMBER if?

A

The valve opens more than 95% during flight

31
Q

On ECAM CABIN PRESS page, the SAFETY valves indicator changes to AMBER if

A

At leas one safety valve is OPEN.

32
Q

When does AUTO pressurization start?

A

During T/O roll

33
Q

An Automatic transfer between the 2 CPC’s occur when?
-70 sec after LDG
-If the operating system fails.
-Moving the LDG elevation knob out of the AUTO position.

A

First two statements are correct

34
Q

Avionics compartments smoke detector is located?

A

In the ventilation extract overboard DUCT.

35
Q

When both the blower and extract pb are set to the override position, ventilation air is supplied by?

A

Air conditioning system via the Air Cond Inlet Valve

36
Q

In NORMAL operation, what is the MAX cabin altitude.

A

8000ft

37
Q

MAX. negative diff. cabin pressure is?

A

-1PSI

38
Q

On MSN higher than 2472, which unit DEPRESSURIZES the A/C in case of ABNORMAL residual pressure on ground?

A

The RCPU

39
Q

MAX. positive differential cabin pressure is

A

9PSI

40
Q

When the guarded “RAM AIR” pb is set to ON?

A

If cabin diff. pressure is less than 1PSI: The outflow valve opens to about 50% when under AUTO control. It does not open when under manual control. EMER RAM air flows directly to the mixer unit.

41
Q

The reference temp set by pilots can be fine tuned for each cabin zone through the temperature control panel installed in FAP. True or False?

A

Only for A/C with ACSC

42
Q

In case of EMERGENCY DESCENT?
-Disconnect A/P and A/THR
-Use of A/P is highly recommended.
-Immediately extend speedbrakes.
-Select TCAS mode on TA

A

Use A/P is recommended.

43
Q

Should the 2 lanes of ACSC fail in models with MSN higher than 2736

A

The related pack is lost, hot air pressure-regulating valve and associated trim air valves closes.

A320 (3 decks)

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