1 AIRCON PRESS.pdf

Question Category Question No (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 valv...

Question Category Question No (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 2 In case of zone controller primary and secondary channel failure, what temperatures are pack 1 and 2: both 25˚C both 20˚C pack 1, 10˚C pack 2 24˚C pack 1, 15˚C pack 2 3 Adding air-conditioned air to the flow Extracting air overboard Adding avionics bay air Passing air through a skin heat exchanger At any time Only when diff. press. is less than 1 psi When press. is greater than 1 psi. diff. Only after outflow valve is fully opened The secondary computer operates as a back-up mode and regulation is not optimised (b) The secondary computer takes over (all functions as normal) Pack is lost (d) Pack outlet temp. is controlled at 15˚C No effect on pack regulation back-up mode is lost Pack is lost No effect (all modes still available) Pack outlet temp. is controlled at 15˚C 7 (a) Pack outlet temp. is controlled at 5°C to 30°C in a maximum of 6 minutes by the ant-ice valve (b) The pack is closed (c) The packs deliver a fixed temperature of 20˚C (d) Both packs are controlled to 24˚C Hot air press. reg. valve failed open: Optimised regulation is lost (b) The temperature stays at the value selected when the failure occurred (d) Cabin temperature will be controlled at the upper limit 30˚C Econ. Flow 10 Adding hot air Adding fresh air Modulation of pack flow Adding recirculated air Regulates the pressure of hot air tapped upstream of the packs (b) Is spring loaded open in the absence of air Opens automatically in case of duct overheat (d) Opens automatically if the cockpit trim air valve fails Is pneumatically operated and electrically controlled (b) Electrically operated and pneumatically controlled Opens automatically during engine starting (d) Is spring loaded to open The cockpit The cabin The avionics bay Only on the CIDS panel at the fwd. attendant station 14 The cockpit The cabin The avionics bay Only the CIDS panel at the fwd. attendant station 15 The minimum idle must be increased manually The minimum idle is increased automatically In any case, flight idle is sufficient The APU must be used to supply additional air 16 What is the norm. max. cabin altitude: 8,000 ft 9,550 +/- 350 ft 14,000 ft What is the max. negative diff. pressure for the cabin: -8.6 psi 18 Yes, if external temperature is greater than 50˚C Yes, provided the airflow supplied by the ground cart is less than 1.2 kg/s 19 The zone controller Anti-ice valve Hot air pressure regulating valve The pack controller Packs, Cabin air, emergency ram air inlet and LP ground connector (b) Packs, emergency ram air inlet and LP ground connector Packs and cabin air (d) Pack 1 and pack 2 only Automatically and independently of each other Normally, but the output of one affects the other Automatically, pack one as a master, pack two as a slave Automatically, pack two as a master, pack one as a slave 22 In any case Diff. press. < 1 psi. and ditching not selected Provided ditching is not selected Provided ditching is selected 23 Cabin zone at fixed temp Packs at fixed temp Secondary channel operates as back up and operation is as normal (d) The packs deliver a fixed temperature, 20˚C pack 1 and 10˚C pack 2 Cockpit, cargo bays and cabin Cockpit, fwd. and aft. cabins Cockpit, avionics bay and cabin Cockpit, cabin and holds 1 & 2 only 25 Air extracted by the lavatory and galley fans Air extracted from the avionics bay Temperature sensors are ventilated by ram air Temperature sensors are ventilated by discharge air to the outflow valve Zone controllers only Pack 1 and 2 controllers only Both the zone and pack 1 & 2 controllers The pack flow control valves only 27 Ram air valve Hot air pressure regulating valve Anti-ice valve Trim air valve Pack anti ice valve Trim air valve Pack flow control valve Hot air pressure regulating valve  120% of normal 102% of normal 120% of normal 102% of normal Pack overheat, engine starting, or operation of the fire or ditching push button (b) Bleed valve failure, pack outlet pressure increase Both (a) and (b) (d) Trim air valve failure 32 14˚C 24˚C 15˚C 10˚C 33 Hot air and trim air valves open and packs deliver air at a fixed temperature; 15˚C pack 1, 10˚C pack 2 (b) Hot air and trim air valves close and packs deliver air at a fixed temperature; 15˚C pack 1, 10˚C pack 2 Hot air and trim air valves close and packs deliver air at a fixed temperature; 20˚C pack 1, 10˚C pack 2 (d) Hot air and trim air valves open and packs deliver air at a fixed temperature; 20˚C pack 1, 10˚C pack 2 77 kts (after 30 sec. delay) 70 kts (after 3 mins) 70 kts (after 20 sec. delay) 140 kts (after 20 sec. delay) To the pack ram air inlet flap To the APU ECB To the pack flow control valve To the engine interface units EIUs  The outflow valve closes when in MAN mode Ram air inlet and ventilation extract valves open The emergency ram air inlet opens Outflow valve, ram air inlet & ventilation extract valves, & the pack flow control valves close 37 In flight with pressure controller 1 in use, if it fails: You have to use the manual control Transfers automatically to controller 2 You have to select manually controller 2 You have to set the landing elevation Fully automatic Manually controlled Automatic, but landing elevation must be manually set Remaining automatic only when CPC 1 is in use One of two electric motors One of three electric motors Three mechanically linked electric motors One of three pneumatic actuators Fully open Fully closed Positioned according to FMGS demands Operating in abort mode 41 Cond. page Bleed page Press. page Vent page One controller active, one in standby Both controllers monitored by FMGC No controller for climb phase and No. 2 controller in cruise and descent (d) No. 1 controller for climb and No. 2 for descent  No. 1 No. 2 Neither Diff. press. < 3 psi Opening cabin doors whilst still pressuirsed Rain entering avionics bay Excessive positive pressure differential, and excessive negative differential (d) Landing with the aircraft pressurised Electrically Hydraulically Pneumatically By the FMGC F/O BARO ref When mode selector is set to manual, the outflow valve is controlled by signals sent via controller 1 or 2: True False Controllers 1 and 2 Only controller 2 It is fully closed It is fully open in flight It is fully open on the ground It is not fully open on the ground  Both safety valves are fully open One safety valve is open Both safety valves are fully closed Both safety valves do not open 51 > 14,000 ft > 8,500 ft > 9,550 ft > 8,800 ft 52 Following a system 1 fault: Master caution is activated, and the crew must take ECAM actions (b) System 2 must be selected by the crew System 2 takes over automatically without any crew action (d) The crew must manually operate the system Engine start Take off power selection (pre-pressurisation) off Selection of climb power 8.06 psi 8.6 psi 9.0 psi psi 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 Selected cabin altitude (d) Selected landing elevation Without delay in all cases With a delay in all cases With a delay if the bleed air was in use Only after the main batteries are switched off 57 (a) APU master switch push button, APU fire push button switch (b) APU master switch push button (c) APU fire push button switch, APU shut off push button (d) APU avail push button switch 31,000 ft 20,000 ft 41,000 ft 45,000 ft Runs when the tank pump pressure is not sufficient Runs all the time Runs only in flight Runs when the APU fuel pump is selected on 99% (Ground, nil bleed demand, -18˚C ≤ OAT 950˚C Electrical power & hydraulic power Electrical power & bleed air Hydraulic power & bleed air Hydraulic power & electrical power Air bleed extraction for wing anti-ice: Is permitted Is not permitted Is permitted only on ground Is permitted only in flight Only on the ground Only in flight Left fuel feed line Right fuel feed line Centre tank always Right inner tank always Stops immediately Keeps running for four minutes Keeps running for between 60 and 120 seconds Keeps running for 10 mins External power is disconnected 2 seconds after APU “N” reaches 95% APU electric power is used Main engine generator is on-line No, it is lubricated and cooled by hydraulic fluid from the green system (d) No, it uses the same oil as engine no. 2  72 Electronic control box Air conditioning system Air intake system 73 Switching off the left fuel pumps Switching off the right fuel pumps Turning off both main batteries Pressing the APU shut off push button on the external interphone panel or pushing the APU fire pushbutton (o/head fire p/b) Only above 25,000 feet Only when the ditching pushbutton has been selected on 75 ECB is electrically supplied Air intake flap closes APU fuel pump starts immediately