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CPL Test Series
Question Bank
Questions for Air Conditioning/Pressurization/Ventilation A320
Answer the following questions
Test Mode
Training Mode
1. What is the function of the Pack Flow selector?
Always allows high flow regardless of switch position when the APU is used for air conditioning.
Both are correct.
Allows the pilot to increase pack flow but will not allow a manual decrease in flow if needed by the aircraft demands.
2. How many trim air valves are there?
Four: one each for the cockpit zone, the first class zone, and two for the aft zone.
Three: one each for the cockpit zone, the forward cabin zone, and the aft cabin zone.
Two: one for the cockpit and first class zone, and one for the cabin zone.
One trim air valve.
3. Pressurization controllers receive inputs from:
MCDU and LGCIU’s.
LGCIU, ADIRU, FMGS, and EIU.
LGCIU’s and the MCDU.
LGCIU’s and pitot static sources.
4. The purpose of the safety valves is to avoid:
All of the above
Excessive positive differential pressure
Excessive negative differential pressure
5. The APU BLEED FAULT indicates that the main APU controller is in fault
False.
True
6. How many temperature selectors are there on the A320? How many temperature zones are there?
Three rotary temperature selectors and one zone.
Three rotary temperature selectors, one each for the cockpit zone, the forward cabin zone, and the aft cabin zone.
Two rotary temperature selectors, one for the cockpit and first class zone and one for the aft cabin zone.
Four rotary temperature selectors and four zones.
7. When does normal pressurization occur?
Pressurization occurs during the takeoff roll.
Pressurization occurs during taxi
After second engine start.
After rotation.
8. The Ram Air valve:
Will open automatically after engine start.
Must be manually activated.
Should be opened for increased ventilation while in flight.
9. What does the CARGO HEAT HOT AIR FAULT light indicate?
All of above.
The Aft Cargo Pressure Regulating valve closes.
A duct overheat is detected.
The system will reset if the ISOL VALVE switch is ON.
10. During flight below _____, the Ram Air Valve can provide an emergency source of conditioned air during non-pressurized flight.
12,500 feet
8,000 feet
10,000 feet
5,000 feet
11. It is permissible to use simultaneously packs and Lp ground unit during long stops in a hot airfield
Yes, if external temperature is greater than 50 deg.C
Yes
No
Yes, provided the airflow supplied by the ground cart is less than 1.2 kg/s
12. Which controller generates excess cabin altitude and pressure signals for ECAM indication in manual mode:
Both
No.1
No.2
Neither
13. Which of the following statements is correct concerning conditioned air?
Conditioned air and trim air are mixed then distributed to each zone.
Recirculated air, conditioned air and hot trim air are mixed then distributed to each zone.
Hot trim air is added to the mixing unit before distribution to each zone.
Recirculating fans draw cabin air to a mixing unit where conditioned air is added.
14. The temperature of the air that exits the compressor section is displayed above the Pack Flow. It normally displays green, but displays amber for temperatures over:
180 deg.C
200 deg.C
250 deg.C
230 deg.C
15. When the pack flow control knob is positioned to HI, air flow is:
100% of normal rate.
120% of normal rate.
80% of normal rate.
150% of normal rate.
16. When landing elevation is set to AUTO, the landing elevation is sent to the controller from:
ADIRS
FMGS.
FCU
Captain baro ref.
17. On ECAM Cab. press page, the safety valve indication changes to amber if:
Both safety valves are fully closed
One safety valve is open.
Both safety valves do not open
Both safety valves are fully open
18. On ECAM Cab. press page, the cabin altitude indication changes to red when cabin altitude is:
> 14,000 ft
>9,550 ft
> 10,000 ft
> 12,500 ft
19. In case of trim air system fault (zone controller primary channel failure), the secondary channel of the zone controller regulated the zone temperature at:
10 deg.C
24 deg.C
14 deg.C
15 deg.C
20. Pressurization indications are found on which ECAM page(s)?
Only on the CAB PRESS page.
On the CAB PRESS & BLEED pages.
The in-flight ECAM cruise page and the CAB PRESS page.
BLEED page.
21. When would you select PACK FLOW to HI?
Smoke removal or hot/humid conditions.
When passengers are complaining it is too cold.
Above FL 250
Above FL 350.
22. Placing the EXTRACT push button to override:
Insures the extract fan will continue to be energized.
Places the avionics ventilation system in the closed configuration.
De-energizes the extract fan
Places the avionics ventilation system in the open configuration.
23. Under what conditions should the pack flow controller be set to LO?
In cold conditions to achieve a higher cabin temperature range.
With a low passenger load to reduce bleed air demand and improve fuel efficiency.
With a high passenger load to reduce cabin temperature
With a low passenger load to increase cabin temperature
24. What computers control the cabin and cockpit conditioned air?
One zone controller that passes information and instructions to two pack controllers for three zones.
Two zone controllers that pass information and requests to two pack controllers.
Three zone controllers that pass information and instructions to two pack controllers for three zones.
Two pack controllers that pass information and requests to three zone controllers.
25. In normal flight in closed circuit configuration, the avionics ventilation system controls the temperature of the cooling air by:
Extracting air overboard
Passing air through a skin heat exchanger
Adding avionics bay air
'Adding air conditioned air to the flow
26. Which statement is correct regarding illumination of the amber AFT ISOL VALVE fault light?
Automatically closes the aft cargo compartment isolation valves.
Indicates that the extract fan has stopped.
All of the above.
Means that either the inlet or outlet isolation valve(s) disagrees with the switch position.
27. The vent fan runs any time there is a normal ships power and the isolation valves are open.
True.
False.
28. If a pack controller fails (primary and secondary channel failure), the pack outlet air temperature is controlled by:
Trim air valve.
Anti-ice valve
Ram Air Valve
Hot air pressure regulating valve
29. What are the different sources of air for air conditioning and pressurization?
Engine bleed air only.
Engine bleed air and recirculated air, or if selected, APU bleed air and recirculated air
Engine bleed air and recirculated air.
Engine bleed air and recirculated air (only on ground)
30. Pack controller, primary and secondary channel failure
The pack is closed
Pack outlet temperature is controlled to between 5 and 30 deg.C by the anti-ice valve
The packs deliver a fixed temperature of 20 deg.C
31. Emergency ram air inlet. When set to “ON” the ram air valve will open and supply airflow:
Diff. press < 1 psi, and ditching not selected
In any case
Provided ditching is selected.
Provided ditching is not selected
32. What limitation is associated with the ram air valve?
Operation is automatic.
Do not open if cabin pressure is greater than 1 psi.
Will not open if the DITCHING switch is off.
Only open while on the ground.
33. The safety valves are operated:
Hydraulically
Electrically
Pneumatically
By the FMGC
34. With the pressurization system in the automatic mode, which valves are closed when the ditching push button is selected on?
Only the avionics cooling valves.
All valves below the water line.
The engine bleed valves.
APU inlet.
35. Both pressurization auto controllers are set by the active flight plan loaded in the MCDU. The QNH entry on the MCDU Approach Performance page refines the depressurization schedule for the landing.
False
True
36. Aft cargo indications may be found on which ECAM page(s)?
The CRUISE page and the COND page.
Only the CAB PRESS page.
Only the BLEED page.
Only the CRUISE page.
37. In case of zone controller primary and secondary channel failure, what temperatures are maintained by pack one and pack two?
15 deg.C both
20 deg.C for pack one and 10 deg.C for pack two
25 deg.C both
24 deg.C for pack one and 15 deg.C for pack two
38. What is the Max. negative Diff. pressure for the cabin?
8.6 psi.
1 psi.
2 psi.
0 psi.
39. The PACK FLOW controller is set to NORM and yet the ECAM display shows PACK FLOW to be high. How is this possible?
HI flow is automatically selected regardless of PACK FLOW selector position because air is only being supplied by the APU.
With cold outside air conditions the PACK FLOW is automatically increased to help increase the cabin temperature.
As no bleed air is flowing the PACK FLOW valves are spring loaded to the fully open position.
As the engines are not running the PACK FLOW indicators are at the position they were selected to at the last shut down.
40. Trim air valve, each one optimizes the temperature by:
Modulating of pack flow
Adding hot air
Adding fresh air
Adding re-circulated air
41. Trim air valves are controlled by:
Hot air pressure regulating valve.
The pack controller
Anti-ice valve.
The zone controller.
42. When APU is supplying the packs, the pack controller sends a demand signal to increase airflow when a zone temperature cannot be satisfied. This signal is sent to the:
Pack Outflow Control Valve.
Engine interface units EIU’s'
APU ECB.
Pack Ram Air Inlet Flap.
43. Once set to “ON” the air conditioning packs operate:
Automatically and independently of each other
Normally, but the output of one affects the other
Automatically, pack two as a master, pack one as a slave.
Automatically, pack one as a master, pack two as a slave
44. When would you select RAM AIR ON?
When pack temperatures are too high.
When there is smoke in the cabin.
Dual pack failure or smoke removal.
If additional cooling is required on the ground.
45. Avionics ventilation system indications may be found on which ECAM page(s)?
Only the CAB PRESS page.
The in-flight ECAM cruise page and the CAB PRESS pages.
The in-flight ECAM cruise page.
Only the BLEED page.
46. The outflow valve is powered by:
Three mechanically linked electric motors.
One of two electric motors.
One of three electric motors.
47. What is the maximum negative differential pressure for the cabin?
0 psi.
3 psi.
2 psi.
1 psi.
48. Does the trim air provide the warm air or the cold air to the air conditioning system?
Cold air
Warm air
49. The Ram Air Inlet Flaps remain open during takeoff and landing to allow extra airflow during high power situations.
True
False
50. During ground function operation, the outflow valve is:
Fully open
Operating in abort mode
Positioned accordingly to FMGS demands
Fully closed
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