Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

command study > 1 - Air Conditioning, Pressureisation & Ventilation > Flashcards

1 - Air Conditioning, Pressureisation & Ventilation Flashcards

1
Q
  1. (DSC-21-10) Hot air fault light illuminates on the air conditioning panel.

(a) The hot air press. reg. valve opens and the trim air valves close.
(b) The hot air press. reg. valve closes and the trim air valves open.
(c) The hot air press. reg. valve closes and the trim air valves close.
(d) The hot air press. reg. valve opens and the trim air valves open.

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. (DSC-21-10) In case of zone controller primary and secondary channel failure, what temperatures are maintained by pack one and pack two;

(a) 15 deg.c. both.
(b) 25 deg.c. both.
(c) 20 deg.c. pack 1, 10 deg.c. pack 2.
(d) 24 deg.c. pack 1, 15 deg.c. pack 2.

A

(c) 20 deg.c. pack 1, 10 deg.c. pack 2.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. (DCS-21-30) In normal flight in closed circuit configuration, the avionics ventilation system controls the temperature of the cooling air by;

(a) Adding air-conditioned air to the flow.
(b) Extracting air overboard.
(c) Adding avionics bay air.
(d) Passing air through a skin heat exchanger.

A

(d) Passing air through a skin heat exchanger.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. (DSC-21-10) To enable Ram air to the mixer until, the Ram air switch should be used;

(a) At any time.
(b) Only when diff. Press. Is less then 1 psi.
(c) When press. Is greater then 1 psi.diff.
(d) Only after outflow valve is fully opened.

A

(b) Only when diff. Press. Is less then 1 psi.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. (DSC-21-10) Pack controller, primary channel failure;
    (a) The secondary computer operates as a back up mode and regulation is not optimised.
    (b) The secondary computer takes over (all functions as normal).
    (c) Pack is lost.
    (d) Pack outlet temp. Is controlled at 15 deg.c.
A

(a) The secondary computer operates as a back up mode and regulation is not optimised.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. (DSC-21-10) Pack controller, secondary channel failure;

(a) No effect on pack regulation back up mode is lost.
(b) Pack is lost.
(c) No effect (all modes still available).
(d) Pack outlet temp. Is controlled at 15 deg.c.

A

(a) No effect on pack regulation back up mode is lost.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. (DSC-21-10) Pack controller, primary and secondary channel failure;
    (a) Pack outlet temp. Is controlled at 5˚C to 30˚C in a maximum of 6 minutes by the anti-ice valve.
    (b) The pack is closed.
    (c) The packs deliver a fixed temperature of 20 deg.c.
    (d) Both packs are controlled to 24 deg.c.
A

(a) Pack outlet temp. Is controlled at 5˚C to 30˚C in a maximum of 6 minutes by the anti-ice valve.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. (DSC-21-10) Hot air press. reg. valve failed open;

(a) Optimised regulation is lost.

(b) The temperature stays at the value selected when the failure occurred.

(c) No effect.

(d) Cabin temperature will be controlled at the upper limit 30 deg.c.

A

(c) No effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. (DSC-21-10) Bleed air supplied from the APU (apu bleed valve open), the pack flow is automatically selected;

(a) High.
(b) Normal.
(c) Low.
(d) Econ. flow.

A

(a) High.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. (DSC-21-10) Trim air valve, each one optimizes the temperature by;

(a) Adding hot air.
(b) Adding fresh air.
(c) Modulation of pack flow.
(d) Adding recirculated air.

A

(a) Adding hot air.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. (DSC-21-10) Hot air pressure regulating valve;

(a) Regulates the pressure of hot air tapped upstream of the packs.

(b) Is spring loaded open in the absence of air.

(c) Opens automatically in case of duct overheat.

(d) Opens automatically if the cockpit trim air valve fails.

A

(a) Regulates the pressure of hot air tapped upstream of the packs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. (DSC-21-10) Pack flow control valve;

(a) Is pneumatically operated and electrically controlled.
(b) Electrically operated and pneumatically controlled.
(c) Opens automatically during engine starting.
(d) Is spring loaded to open.

A

(a) Is pneumatically operated and electrically controlled.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. (DSC-21-10) The temperature selectors are located in;

(a) The cockpit.
(b) The cabin.
(c) The avionics bay.
(d) Only on the CIDS panel at the fwd. attendant station.

A

(a) The cockpit.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. (DSC-21-10) Pack flow may be selected from;

(a) The cockpit.
(b) The cabin.
(c) The avionics bay.
(d) Only the CIDS panel at the fwd. attendant station.

A

a) The cockpit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. (DSC-21-10) Engine pressure demand, when the cooling demand in one zone cannot be satisfied, if bleed pressure is low;

(a) The minimum idle must be increased manually.
(b) The minimum idle is increased automatically.
(c) In any case, flight idle is sufficient.
(d) The APU must be used to supply additional air.

A

(b) The minimum idle is increased automatically.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. (LIM-21-21-20) What is the Norm. Max. cabin altitude;

(a) 8,000 ft.
(b) 9,550 +/- 350 ft.
(c) 14,000 ft.
(d) 800 ft.

A

(a) 8,000 ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
  1. (LIM-21-21-20) What is the Max. negative Diff. pressure for the cabin;

(a) 0 psi.
(b) -1 psi.
(c) -2 psi.
(d) -8.6 psi.

A

(b) -1 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q
  1. (LIM-21-21-10) Is it permissible to use simultaneously packs and Lp ground unit during long stops in a hot airfield;

(a) Yes.
(b) No.
(c) Yes, if external temperature is greater than 50 deg.c.
(d) Yes, provided the airflow supplied by the ground cart is less than 1.2 kg/s.

A

(b) No.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q
  1. (DSC-21-10) Trim air valves are modulated by;

(a) The zone controller.
(b) Anti-ice valve.
(c) Hot air pressure regulating valve.
(d) The pack controller.

A

(a) The zone controller.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q
  1. (DSC-21-10) The mixing unit is connected to;

(a) Packs, Cabin air, emergency ram air inlet and Lp ground connector.

(b) Packs, emergency ram air inlet and Lp ground connector.

(c) Packs and cabin air.

(d) Pack 1 and pack 2 only.

A

(a) Packs, Cabin air, emergency ram air inlet and Lp ground connector.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q
  1. (DSC-21-10) Once set to ‘ON’ the air conditioning packs operate;

(a) Automatically and independently of each other.
(b) Normally, but the output of one affects the other.
(c) Automatically, pack one as a master, pack two as a slave.
(d) Automatically, pack two as a master, pack one as a slave.

A

(a) Automatically and independently of each other.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q
  1. (DSC-21-10) Emergency ram air inlet, when set to ‘ON’ the ram air valve will open and supply airflow;

(a) In any case.
(b) Diff. press. < 1 psi. and ditching not selected.
(c) Provided ditching is not selected.
(d) Provided ditching is selected.

A

(b) Diff. press. < 1 psi. and ditching not selected.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q
  1. (DSC-21-10) Zone controller fault (primary channel failure);

(a) Cabin zone at fixed temp.
(b) Packs at fixed temp.
(c) Secondary channel operates as back up and operation is as normal.
(d) The packs deliver a fixed temperature, 20 deg.c. pack 1 and 10 deg.c.pack 2.

A

(a) Cabin zone at fixed temp.

24
Q
  1. (DSC-21-10) Conditioned air is distributed to;

(a) Cockpit, cargo bays and cabin.
(b) Cockpit, fwd. and aft. cabins.
(c) Cockpit, avionics bay and cabin.
(d) Cockpit, cabin and holds 1 & 2 only.

A

(b) Cockpit, fwd. and aft. cabins.

25
Q
  1. (DSC-21-10) The cabin zone temperature sensors are ventilated by;

(a) Air extracted by the lavatory and galley fans;
(b) Air extracted from the avionics bay.
(c) Temperature sensors are ventilated by ram air.
(d) Temperature sensors are ventilated by discharge air to the outflow valve.

A

(a) Air extracted by the lavatory and galley fans;

26
Q
  1. (DSC-21-10) Temperature control is automatic and is regulated by;

(a) Zone controllers only.
(b) Pack 1 and 2 controllers only.
(c) Both the zone and pack 1 & 2 controllers.
(d) The pack flow control valves only.

A

(c) Both the zone and pack 1 & 2 controllers.

27
Q
  1. (DSC-21-10) If a pack controller fails, (primary and secondary channel failure), the pack outlet air temperature is controlled by;

(a) Ram Air Valve
(b) Hot Air Pressure Regulating Valve
(c) Anti Ice Valve
(d) Trim air valve

A

(c) Anti Ice Valve

28
Q
  1. (DSC-21-10) The Zone Controller optimizes temperature by action on;

(a) Pack anti ice valve.
(b) Trim Air valve
(c) Pack Flow control valve.
(d) Hot air pressure regulating valve.

A

(b) Trim Air valve

29
Q
  1. (DSC-21-10) When the pack flow control knob is positioned to HI, airflow is;

(a) 80 % of normal.
(b) 150 % of normal.
(c) 120 % of normal.
(d) 102 % of normal.

A

(c) 120 % of normal

30
Q
  1. (DSC-21-10) When using APU bleed to supply the packs, with the pack flow selector at Lo, the pack airflow is;

(a) 80 % of normal.
(b) Normal.
(c) 120 % of normal.
(d) 102 % of normal.

A

(c) 120 % of normal.

31
Q
  1. (DSC-21-10) The pack flow control valve closes automatically in case of;

(a) Pack overheat, engine starting, or operation of the fire or ditching push button.
(b) Bleed valve failure, pack outlet pressure increase.
(c) Both (a) and (b).
(d) Trim air valve failure.

A

(a) Pack overheat, engine starting, or operation of the fire or ditching push button.

32
Q
  1. (DSC-21-10) In case of trim air system fault (zone controller primary channel failure),the secondary channel of the zone controller regulates the zone temperature at;
    (a) 14 deg.c.
    (b) 24 deg.c.
    (c) 15 deg.c.
    (d) 10 deg.c.
A

(b) 24 deg.c.

33
Q
  1. (DSC-21-10) In case of total zone controller failure ;

(a) Hot air and trim air valves open and packs deliver air at a fixed temperature; 15 deg.c. pack 1 , 10 deg.c.pack 2.

(b) Hot air and trim air valves close and packs deliver air at a fixed temperature; 15 deg.c. pack 1, 10 deg.c.pack 2.

(c) Hot air and trim air valves close and packs deliver air at a fixed temperature; 20 deg.c. pack 1 , 10 deg.c. pack 2.

(d) Hot air and trim air valves open and packs deliver air at a fixed temperature; 20 deg.c. pack 1 , 10 deg.c. pack 2.

A

(c) Hot air and trim air valves close and packs deliver air at a fixed temperature; 20 deg.c. pack 1 , 10 deg.c. pack 2.

34
Q
  1. (DSC-21-10) During landing run ram air inlet flaps open when speed is less than;

(a) 77 kts. (after 30 sec. delay).
(b) 70 kts. (after 3 mins ).
(c) 70 kts. (after 20 sec. delay).
(d) 140 kts. (after 20 sec. delay).

A

(c) 70 kts. (after 20 sec. delay).

35
Q
  1. (DSC-21-10) When the APU is supplying the packs, the pack controller sends a demand signal to increase airflow when a zone temperature cannot be satisfied;
    (a) To the pack ram air inlet flap.
    (b) To the APU ECB.
    (c) To the pack flow control valve.
    (d) To the engine interface units EIUs.
A

(b) To the APU ECB.

36
Q
  1. (DSC-21-20) The ditching switch when selected;

(a) The outflow valve closes when in MAN mode.
(b) Ram air inlet and ventilation extract valves open.
(c) The emergency ram air inlet opens.
(d) Outflow valve, ram air inlet & ventilation extract valves, & the pack flow control valves close.

A

(d) Outflow valve, ram air inlet & ventilation extract valves, & the pack flow control valves close.

37
Q
  1. (DSC-21-20) In flight with pressure controller 1 in use, if it fails;

(a) You have to use the manual control.
(b) Transfers automatically to controller 2.
(c) You have to select manually controller 2.
(d) You have to set the landing elevation.

A

(b) Transfers automatically to controller 2.

38
Q
  1. (DSC-21-20) In normal operation, pressurisation is;

(a) Fully automatic.
(b) Manually controlled.
(c) Automatic, but landing elevation must be manually set.
(d) Remaining automatic only when CPC 1 is in use.

A

(a) Fully automatic.

39
Q
  1. (DSC-21-20) The outflow valve is powered by;

(a) One of two electric motors.
(b) One of three electric motors.
(c) Three mechanically linked electric motors.
(d) One of three pneumatic actuators.

A

(b) One of three electric motors.

40
Q
  1. (DSC-21-20) During ground function operation, the outflow valve is;

(a) Fully open.
(b) Fully closed.
(c) Positioned according to FMGS demands.
(d) Operating in abort mode.

A

(a) Fully open.

41
Q
  1. (DSC-21-20) To see the position of the outflow valve, it is necessary to call ECAM;

(a) Cond. page.
(b) Bleed page.
(c) Press. page.
(d) Vent page.

A

(c) Press. page.

42
Q
  1. (DSC-21-20) Two identical, independent, automatic digital pressurisation controllers are used for system control;

(a) One controller active, one in standby.
(b) Both controllers monitored by FMGC.
(c) No controller for climb phase and No. 2 controller in cruise and descent.
(d) No. 1 controller for climb and No. 2 for descent.

A

(a) One controller active, one in standby.

43
Q
  1. (DSC-21-20) Which controller position generates excess cabin altitude and pressure signals for ECAM indication in manual mode;

(a) Both.
(b) No. 1.
(c) No. 2.
(d) Neither.

A

(b) No. 1.

44
Q
  1. (DSC-21-20) When ram air Pb set to ON, (& ditching not selected), the outflow valve will open when;

(a) Diff. press. >1.5 psi.
(b) Diff. press. < 3 psi.
(c) Diff. press. < 1 psi.
(d) Diff. press. > 1 psi.

A

(c) Diff. press. < 1 psi.

45
Q
  1. (DSC-21-20) The purpose of the safety valves is to avoid;

(a) Opening cabin doors whilst still pressuirsed.
(b) Rain entering avionics bay.
(c) Excessive positive pressure differential, and excessive negative differential.
(d) Landing with the aircraft pressurised.

A

(c) Excessive positive pressure differential, and excessive negative differential.

46
Q
  1. (DSC-21-20) The safety valves are operated;

(a) Electrically.
(b) Hydraulically.
(c) Pneumatically.
(d) By the FMGC.

A

(c) Pneumatically.

47
Q
  1. (DSC-21-20) When landing elevation is set to auto, the landing elevation is sent to the controller from;

(a) FMGS.
(b) FCU.
(c) ADIRS.
(d) F/O baro ref.

A

(a) FMGS.

48
Q
  1. (DSC-21-20) When mode sel. is set to manual, the outflow valve is controlled by signals sent via controller 1 or 2 ;

(a) True.
(b) False.
(c) Controllers 1 and 2.
(d) Only controller 2.

A

(b) False.

49
Q
  1. (DSC-21-20) On ECAM Cab press. page, the outflow valve indicator changes to amber if;

(a) It is fully closed.
(b) It is fully open in flight.
(c) It is fully open on the ground.
(d) It is not fully open on the ground.

A

(b) It is fully open in flight.

50
Q
  1. (DSC-21-20) On ECAM Cab. press. page, the safety valve indication changes to amber if;

(a) Both safety valves are fully open.
(b) One safety valve is open.
(c) Both safety valves are fully closed.
(d) Both safety valves do not open.

A

(b) One safety valve is open.

51
Q
  1. (DSC-21-20) On ECAM cab. press. page, the cabin altitude indication changes to red when cabin altitude is;

(a) > 14,000 ft.
(b) > 8,500 ft.
(c) > 9,550 ft.
(d) > 8,800 ft.

A

(c) > 9,550 ft.

52
Q
  1. (DSC-21-20) Following a system 1 fault;

(a) Master caution is activated and the crew must take ECAM actions.

(b) System 2 must be selected by the crew.

(c) System 2 takes over automatically without any crew action.

(d) The crew must manually operate the system.

A

(c) System 2 takes over automatically without any crew action.

53
Q
  1. (DSC-21-20) Cabin pressurisation starts at;

(a) Engine start.
(b) Take off power selection. (prepressurisation)
(c) Lift off.
(d) Selection of climb power

A

(b) Take off power selection. (prepressurisation)

54
Q
  1. (DSC-21-20) The pressure safety valve opens at;

(a) 8.06 psi.
(b) 8.6 psi.
(c) 9.0 psi.
(d) 7.6 psi.

A

(b) 8.6 psi.

55
Q
  1. (DSC-21-20) In fully automatic mode, cabin pressurisation is optimised by using information from;

(a) FMGC, landing field elevation & destination QNH, ADIRS static press. baro. correction and EIU thrust lever angle info.

(b) Actual cruise level and selected landing elevation.

(c) Selected cabin altitude.

(d) Selected landing elevation.

A

(a) FMGC, landing field elevation & destination QNH, ADIRS static press. baro. correction and EIU thrust lever angle info.

command study (85 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions