A320 ATA 21 Air Cond.

Question 1

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

Answer 1

750ft/min

Question 2

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

Answer 2

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

Question 3

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

Answer 3

Passing air through a skin heat exchanger

Question 4

Temperature regulation is automatic and controlled by?

Answer 4

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

Question 5

Optimized temperature regulation

Answer 5

The system optimizes the temperature acting on the trim air valves

Question 6

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

Answer 6

True in ALL FLEET

Question 7

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?

Answer 7

All are false

Question 8

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

Answer 8

No effect

Question 9

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

Answer 9

High

Question 10

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

Answer 10

Adding HOT AIR

Question 11

The “HOT AIR” pressure regulating valve:

Answer 11

Regulates the pressure of hot air tapped upstream of the packs

Question 12

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

Answer 12

Pneumatically operated
Electrically controlled

Question 13

The zone temperature selectors are located in?

Answer 13

Cockpit in the overhead panel

Question 14

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

Answer 14

Minimum idle is increased automatically

Question 15

TRIM AIR valves are controlled by?

Answer 15

Zone controller or the ACSC on MSN higher than 2736

Question 16

The MIXER UNIT is connected to?

Answer 16

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

Question 17

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

Answer 17

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

Question 18

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

Answer 18

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

Question 19

The PACK FLOW control valce closes AUTOMATICALLY in case of:

Answer 19

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

Question 20

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

Answer 20

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

Question 21

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.

Answer 21

All are CORRECT

Question 22

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?

Answer 22

APU ECB (electronic control box)

Question 23

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.

Answer 23

ALL CORRECT

Question 24

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

Answer 24

It transfers auto to CPC n.2

Question 25

The OUTFLOW valve is powered by?

Answer 25

Either of the THREE electric motors

Question 26

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

Answer 26

Fully open

Question 27

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.

Answer 27

Below 1 PSI

Question 28

The function of the safety valves is to avoid?

Answer 28

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

Question 29

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

Answer 29

True

Question 30

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

Answer 30

The valve opens more than 95% during flight

Question 31

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

Answer 31

At leas one safety valve is OPEN.

Question 32

When does AUTO pressurization start?

Answer 32

During T/O roll

Question 33

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.

Answer 33

First two statements are correct

Question 34

Avionics compartments smoke detector is located?

Answer 34

In the ventilation extract overboard DUCT.

Question 35

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

Answer 35

Air conditioning system via the Air Cond Inlet Valve

Question 36

In NORMAL operation, what is the MAX cabin altitude.

Answer 36

8000ft

Question 37

MAX. negative diff. cabin pressure is?

Answer 37

-1PSI

Question 38

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

Answer 38

The RCPU

Question 39

MAX. positive differential cabin pressure is

Answer 39

9PSI

Question 40

When the guarded "RAM AIR" pb is set to ON?

Answer 40

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.

Question 41

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?

Answer 41

Only for A/C with ACSC

Question 42

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

Answer 42

Use A/P is recommended.

Question 43

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

Answer 43

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