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TKE-P > AIRCONDITIONING - PRESSURIZATION > Flashcards

AIRCONDITIONING - PRESSURIZATION Flashcards

1
Q

What appens when the Hot air “FAULT” light illuminates on the air conditioning panel?

A

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

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2
Q

What happens in case of an Air Conditioning System Controller dual lane failure

A

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

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3
Q

During 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

When is the RAM AIR switch used?

A

Only when delta P is less than 1psi

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5
Q

What happens when there is an Air Conditioning System Controller single lane failure:

A

no effect, as the second lane takes over.

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6
Q

Each Pack is consist of heat exchangers, compressor and turbine. The purpose of the turbine is to:

A
  1. Drives the compressor
  2. Serves as Cooling Air Fan
  3. Expands and cools the air.
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7
Q

True or False?

The Mixer Unit connects to the ff:

  • cabin fans,
  • LP ground connector,
  • emergency ram air inlet,
  • Pack 1 and Pack 2.
A

True

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8
Q

What happens when the Hot air press reg. valve fails to open?

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 to what value?

A

High

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10
Q

How does the Trim Air Valve optimize the temperature?

A

adding hot air

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11
Q

What is the function of the Hot air pressure regulating valve?

A

Regulates the pressure of hot air, tapped upstream of the packs

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12
Q

How does the Pack flow control valve operate? and how is it controlled?

A
  • pneumatically operated
  • electrically controlled
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13
Q

The temperature selectors are located in:

A

the cockpit overhead panel

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14
Q

Pack flow may be selected from the?

A

cockpit overhead panel

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15
Q

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

A

the minimum idle is increased automatically

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16
Q

What is the maximum norm cabin altitude?

A

8000 ft

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17
Q

What is the maximum negative differential pressure for the cabin:

A

-1 psi

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18
Q

Is it possible to use simultaneously Packs and LP Ground Unit during long stops in a hot airfield:

A

NO

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19
Q

Trim air valves are modulated by the?

A

air conditioning system controllers

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20
Q

The mixing unit is connected to the:

A
  • packs,
  • cabin air,
  • emergency ram air inlet
  • LP ground connector
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21
Q

Once set to “ON”, how does the air conditioning packs operate?

A

automatically and independently of each other

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22
Q

If the Emergency ram air inlet is set to “ON”, what are the 2 conditions for the ram air valve to open?

A
  1. when delta P < 1 psi
  2. and the Ditching pb is not selected
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23
Q

Hot-Air Pressure-Regulating Valve is controlled by the:

A

Air Conditioning System Controller 1

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24
Q

Conditioned air is distributed to which sections of the aircraft?

A
  • cockpit,
  • forward and aft cabins
25
Q

True or False?

The cabin zone temperature sensors are ventilated by the air extracted by the lavatory and galleys fans:

A

True

26
Q

What are the grounds/conditions be for The Hot-Air Pressure-Regulating Valve to close automatically?

A

Both lanes of the Air Conditioning System Controller 1 or 2 fails.

27
Q

The Hot-Air Pressure-Regulating Valve closes automatically when;

A

Cockpit trim air valve or cabin trim air valves fail

28
Q

When the pack flow control selector is positioned to HI, air flow is at ___%:

A

120% of normal

29
Q

When using APU bleed to supply the Packs, with the Pack Flow Selector at LO, the Pack air flow is at ___%:

A

120% of normal

30
Q

The pack flow control valve closes automatically in case of the ff instances:

A
  • pack overheat,
  • engine fire push button released,
  • engine start,
  • ditching pb pressed
31
Q

What happens when there is a Trim air valve failure?

A

the optimized temperature regulation of the corresponding zone is lost.

32
Q

There are how many trim air valves?

A

3, one for the cockpit and two for the cabin

33
Q

During landing run, packs ram air inlet flaps open when the speed is less than:

A

70 kts ( after 20 sec delay )

34
Q

During landing run, packs ram air inlet flaps open when the speed is less than:

A

70 kts ( after 20 sec delay )

35
Q

When APU is supplying the Packs, the air conditioning system controller sends a demand signal to which system? in order to increase air flow when a zone temperature cannot be satisfied.

A

to the APU ECB

36
Q

The ditching switch when selected ON sends a closure signal to

A
  • outflow valve
  • ram air inlet
  • ventilation inlet
  • extract valves
  • pack flow control valves
37
Q

In flight, what happens with cabin pressure controller 1 in use, if it fails?

A

transfers automatically to cabin pressure controller 2

38
Q

In normal operation, how does the aircraft pressurization operate?

A

fully automatic

39
Q

The outflow valve is powered by how many motors?

A

one of three electric motors

40
Q

During ground function operation, the outflow valve is:

A

fully opened

41
Q

At which page of the ECAM can you confirm the position of the outflow valve?

A

CAB PRESS Page

42
Q

What is the default configuration for the Two identical, independent, automatic digital pressurization controllers used for system control?

A

one controller active, one in standby

43
Q

Which controller generates excess cabin altitude and pressure outputs for ECAM indication in manual mode?

A

N°1

44
Q

When Ram Air pb is set to ON, the outflow valve will open 50% when delta P is:

A

< 1 psi

45
Q

The purpose of the safety valves is to avoid:

A
  • excessive positive pressure differential
  • excessive negative pressure differential
46
Q

The safety valves are operated:

A

pneumatically

47
Q

When landing elevation is set to AUTO, the landing elevation is sent to the controller from:

A

FMGC

48
Q

True or False?

When Mode SEL is set to MANUAL, the outflow valve is controlled by signals sent via controller 1 or 2

A

False

49
Q

On ECAM CAB PRESS page, the outflow valve indicator changes to amber if:

A

valve open (more than 95% during flight)

50
Q

On ECAM CAB PRESS page, the safety valve indication changes to amber if:

A

one safety valve is open

51
Q

On ECAM CAB PRESS page the cabin altitude indication changes to red, when the cabin altitude is:

A

> 9, 550 ft

52
Q

What happens when Following a SYS 1 fault?

A

System 2 takes over automatically without crew action

53
Q

Cabin pressurization starts at:

A

take-off power selection

54
Q

The safety valves open at __ psi

A

8.6 psi

55
Q

In automatic mode, cabin pressurization is optimized by using information from the ff:

A
  • FMGS landing field elev,
  • dest. QNH
  • and static pressure information
56
Q

During normal flight and with skin temp. below + 35 °C, the avionics ventilation system controls the temperature of the cooling air by:

A

passing air through a skin heat exchanger

57
Q

When the Ram Air pb set to “ON” the emer. ram air inlet valve will open when:

A
  • ΔP < 1 psi
  • and ditching is not selected
58
Q

When the RAM AIR pb is set to ON, what happens to the outflow valve?

A

opens about 50% only when delta P is less than 1psi

TKE-P (17 decks)

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