Vayudoot Aviation

1. 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

250 deg.C

230 deg.C

200 deg.C

2. Engine flow demand, when the heating or cooling demand in one zone cannot be satisfied:

The minimum idle must be increased manually

In any case, flight idle is sufficient

The APU must be used to supply additional air

The minimum idle is increased automatically

3. The mixing unit is connected to:

Packs, cabin air, emergency ram air inlet and Lp ground connector

Packs, emergency ram air inlet and Lp ground connector

Pack 1 and pack 2 only.

Packs and cabin air

4. Pressurization controllers receive inputs from:

MCDU and LGCIU’s.

LGCIU’s and the MCDU.

LGCIU, ADIRU, FMGS, and EIU.

LGCIU’s and pitot static sources.

5. Does the trim air provide the warm air or the cold air to the air conditioning system?

Cold air

Warm air

6. 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.

Places the avionics ventilation system in the open configuration.

De-energizes the extract fan

7. During landing run, Ram Air Inlet flaps open when speed is less than:

70 kts (after 20 seconds delay)

85 kts (after 20 seconds delay)

77 kts (after 30 seconds delay

70 kts (after 1 minute delay)

8. On ECAM Cab. press page, the safety valve indication changes to amber if:

Both safety valves do not open

Both safety valves are fully closed

Both safety valves are fully open

One safety valve is open.

9. What are the different sources of air for air conditioning and pressurization?

Engine bleed air and recirculated air, or if selected, APU bleed air and recirculated air

Engine bleed air only.

Engine bleed air and recirculated air (only on ground)

Engine bleed air and recirculated air.

10. When mode selector is selected to manual, the outflow valve is controlled by signals sent via controller 1 or 2

True

False

11. Under what conditions should the pack flow controller be set to LO?

With a high passenger load to reduce cabin temperature

With a low passenger load to reduce bleed air demand and improve fuel efficiency.

In cold conditions to achieve a higher cabin temperature range.

With a low passenger load to increase cabin temperature

12. Pack controller, secondary channel failure

No effect on pack regulation backup mode is lost

No effect (all modes still available)

Pack is lost

Pack outlet temperature is controlled at 15 deg.C'

13. If you select a position other than the AUTO detent on the LDG ELEV AUTO selector, how can you see the actual landing elevation value?

On the ECAM CRUISE or the PRESS page.

On the PRESS page

On the ECAM CRUISE

14. The PACK FLOW controller is set to NORM and yet the ECAM display shows PACK FLOW to be high. How is this possible?

As the engines are not running the PACK FLOW indicators are at the position they were selected to at the last shut down.

HI flow is automatically selected regardless of PACK FLOW selector position because air is only being supplied by the APU.

As no bleed air is flowing the PACK FLOW valves are spring loaded to the fully open position.

With cold outside air conditions the PACK FLOW is automatically increased to help increase the cabin temperature.

15. With APU BLEED ON and engine BLEED switches ON with engines running, what is the position of the engine bleed valves?

Closed

Depends on the crossbleed selector

Open

16. When would you select RAM AIR ON?

When pack temperatures are too high.

When there is smoke in the cabin.

If additional cooling is required on the ground.

Dual pack failure or smoke removal.

17. In case of total zone controller failure:

Hot air and trim air valves open and packs deliver air at a fixed temperature (15 deg.C pack 1 and 10 deg.pack2)

Hot air and trim air valves close and packs deliver air at a fixed temperature (20 deg.C pack 1 and 10 deg.pack2)

Hot air and trim air valves close and packs deliver air at a fixed temperature (15 deg.C pack 1 and 10 deg.pack2)

Hot air and trim air valves open and packs deliver air at a fixed temperature (20 deg.C pack 1 and 10 deg.pack2)

18. The cabin zone temperature sensors are ventilated by the air extracted by the lavatory and galley fans.

False

True

19. When the pack flow control knob is positioned to HI, air flow is:

120% of normal rate.

150% of normal rate.

80% of normal rate.

100% of normal rate.

20. Hot air press. reg. valve failed open

Cabin temperature will be controlled at the upper limit 30 deg.C

No effect

The temperature stays at the value selected

Optimized regulation is lost

21. Hot air fault light illuminates on the air conditioning panel,

The hot air press. reg. valve closes and the trim air valves close.

The hot air press. reg. valve opens and the trim air valves close.

The hot air press. reg. valve opens and the trim air valves open.

The hot air press. reg. valve closes and the trim air valves open.

22. To see the operation of the outflow valve, it is necessary to call ECAM:

Bleed page

Cond page

Vent page

Press page

23. The purpose of the safety valves is to avoid:

Excessive negative differential pressure

All of the above

Excessive positive differential pressure

24. Avionics ventilation system indications may be found on which ECAM page(s)?

Only the BLEED page.

Only the CAB PRESS page.

The in-flight ECAM cruise page and the CAB PRESS pages.

The in-flight ECAM cruise page.

25. Aft cargo ventilation is controlled by:

The zone controller and the SDCU.

The cargo ventilation controller.

The aft cargo rotary selector knob.

The cargo ventilation controller and the aft cargo rotary selector knob.

26. The RAM AIR switch should be used:

Only when differential pressure is less than 1 psi.

Only after outflow valve is fully opened

At any time.

When differential pressure is more than 1 psi.

27. Trim air valve, each one optimizes the temperature by:

Adding hot air

Modulating of pack flow

Adding fresh air

Adding re-circulated air

28. Which statement is TRUE concerning the cargo compartment ventilation?

Only the aft cargo compartment is heated and ventilated. Cabin ambient air is mixed with hot trim air and drawn through isolation valves by extraction fans.

Both cargo compartments are pressurized and heated using both cabin air and hot trim air.

Recirculated air, conditioned air, and hot trim air are mixed then distributed to each cargo compartment.

29. The pressure safety valve opens at:

7.0 psi

8.6 psi

9.0 psi

8.06 psi

30. The Ram Air Inlet Flaps remain open during takeoff and landing to allow extra airflow during high power situations.

True

False

31. In case of zone controller primary and secondary channel failure, what temperatures are maintained by Packs 1 and 2?

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.

15 deg.C for both.

32. Hot air pressure regulating valve:

Opens automatically if the cabin trim air valve fails

Regulates the pressure of hot air tapped upstream of the packs

Is spring loaded open in the absence of air

Opens automatically in case of duct overheat

33. 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.

34. Which configuration is the avionics ventilation system in while airborne with no abnormals present?

Closed.

Fire.

Open

Smoke.

35. The zone controller optimizes temperature by action on:

Hot air pressure regulating valve

Pack flow control valve

Trim air valve

Pack anti-ice valve

36. Placing the BLOWER push button to override:

De-energizes the blower fan.

Insures the blower fan will continue to run.

Places the avionics ventilation system in the open configuration

Places the avionics ventilation system in the closed configuration.

37. What limitation is associated with the ram air valve?

Will not open if the DITCHING switch is off.

Only open while on the ground.

Operation is automatic.

Do not open if cabin pressure is greater than 1 psi.

38. After the engine start, the Pack Flow Control Valves automatically open, however on the ground, reopening of the valves is delayed for _____ after the first engine start.

60 seconds

30 seconds

50 seconds

45 seconds

39. Under what conditions should the pack flow controller be set to HI?

In cold conditions to achieve a higher cabin temperature range.

With a high passenger load in hot conditions in order to help reduce the cabin temperature.

With a low passenger load to increase cabin air flow.

40. The temperature selectors are located in:

Only on the CIDS panel

The cabin

The cockpit

Both

41. Two identical, independent, automatic digital pressurization controllers are used for system control:

No controller for climb phase and No.2 controller in cruise and descent

Both controllers monitored by FMGC

No.1 controller for climb and No.2 for descent

One controller active, one in standby

42. The purpose of the safety valve is to avoid:

Excessive positive pressure differential.

Excessive negative differential.

Both are correct.

43. What position do the pack valves go to in the event of a loss of the bleed system pressure?

They remain in their last position.

Closed.

Full open.

Mid position.

44. 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.

45. Pressurization indications are found on which ECAM page(s)?

The in-flight ECAM cruise page and the CAB PRESS page.

BLEED page.

On the CAB PRESS & BLEED pages.

Only on the CAB PRESS page.

46. During flight below _____, the Ram Air Valve can provide an emergency source of conditioned air during non-pressurized flight.

5,000 feet

12,500 feet

10,000 feet

8,000 feet

47. What is the maximum altitude associated with the pressurization system?

41,100 feet

39,500 feet

41,000 feet

39,100 feet

48. Pack controller, primary channel failure.

The secondary computer takes over (all functions as normal)

Pack outlet temperature is controlled at 15 deg.C

Pack is lost

The secondary computer operates as a backup mode and regulation is not optimized

49. 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:

APU ECB.

Pack Ram Air Inlet Flap.

Engine interface units EIU’s'

Pack Outflow Control Valve.

50. At what cabin altitude do you get an ECAM warning?

9,550 feet

9,000 feet

14,000 feet.

8,800 feet.

Question Bank

Questions for Air Conditioning/Pressurization/Ventilation A320