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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
True or False? The cabin zone temperature sensors are ventilated by the air extracted by the lavatory and galleys fans:
True
26
What are the grounds/conditions be for The Hot-Air Pressure-Regulating Valve to close automatically?
Both lanes of the Air Conditioning System Controller 1 or 2 fails.
27
The Hot-Air Pressure-Regulating Valve closes automatically when;
Cockpit trim air valve or cabin trim air valves fail
28
When the pack flow control selector is positioned to HI, air flow is at \_\_\_%:
120% of normal
29
When using APU bleed to supply the Packs, with the Pack Flow Selector at LO, the Pack air flow is at \_\_\_%:
120% of normal
30
The pack flow control valve closes automatically in case of the ff instances:
* pack overheat, * engine fire push button released, * engine start, * ditching pb pressed
31
What happens when there is a Trim air valve failure?
the optimized temperature regulation of the corresponding zone is lost.
32
There are how many trim air valves?
3, one for the cockpit and two for the cabin
33
During landing run, packs ram air inlet flaps open when the speed is less than:
70 kts ( after 20 sec delay )
34
During landing run, packs ram air inlet flaps open when the speed is less than:
70 kts ( after 20 sec delay )
35
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.
to the APU ECB
36
The ditching switch when selected ON sends a closure signal to
* outflow valve * ram air inlet * ventilation inlet * extract valves * pack flow control valves
37
In flight, what happens with cabin pressure controller 1 in use, if it fails?
transfers automatically to cabin pressure controller 2
38
In normal operation, how does the aircraft pressurization operate?
fully automatic
39
The outflow valve is powered by how many motors?
one of three electric motors
40
During ground function operation, the outflow valve is:
fully opened
41
At which page of the ECAM can you confirm the position of the outflow valve?
CAB PRESS Page
42
What is the default configuration for the Two identical, independent, automatic digital pressurization controllers used for system control?
one controller active, one in standby
43
Which controller generates excess cabin altitude and pressure outputs for ECAM indication in manual mode?
N°1
44
When Ram Air pb is set to ON, the outflow valve will open 50% when delta P is:
\< 1 psi
45
The purpose of the safety valves is to avoid:
* excessive positive pressure differential * excessive negative pressure differential
46
The safety valves are operated:
pneumatically
47
When landing elevation is set to AUTO, the landing elevation is sent to the controller from:
FMGC
48
True or False? When Mode SEL is set to MANUAL, the outflow valve is controlled by signals sent via controller 1 or 2
False
49
On ECAM CAB PRESS page, the outflow valve indicator changes to amber if:
valve open (more than 95% during flight)
50
On ECAM CAB PRESS page, the safety valve indication changes to amber if:
one safety valve is open
51
On ECAM CAB PRESS page the cabin altitude indication changes to red, when the cabin altitude is:
\> 9, 550 ft
52
What happens when Following a SYS 1 fault?
System 2 takes over automatically without crew action
53
Cabin pressurization starts at:
take-off power selection
54
The safety valves open at __ psi
8.6 psi
55
In automatic mode, cabin pressurization is optimized by using information from the ff:
* FMGS landing field elev, * dest. QNH * and static pressure information
56
During normal flight and with skin temp. below + 35 °C, the avionics ventilation system controls the temperature of the cooling air by:
passing air through a skin heat exchanger
57
When the Ram Air pb set to “ON” the emer. ram air inlet valve will open when:
* ΔP \< 1 psi * and ditching is not selected
58
When the RAM AIR pb is set to ON, what happens to the outflow valve?
opens about 50% only when delta P is less than 1psi

TKE-P (17 decks)

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