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Fly in Beautiful Sky
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A320
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A320 Neo

HYDRAULICS



Airbus A320
HYDRAULICS

(*Please refer the latest A320 Fcom, If any suggestion for improvement then please send us in comment box )
(Smart Aviator Android App users and Mobile Browser users please swipe left or right for next topic)


1.    How are the hydraulic reservoir pressurized pneumatically ?
·         By APU bleed directly.
·         By engine 2 bleed directly.
·         By engine 1 bleed directly or cross bleed duct
·         By engine 2 bleed directly or cross bleed duct.

2.    When do you use ‘RAT MAN ON “ pb
·         If blue electric pump is failed.
·         If there is a dual Hydraulic failure along with blue system.
·         As in (b) and only in approach RAT is extended.
·         If blue electric pump is over heated.

3.    What are the indications if Yellow Leak Measurement Valve remains in closed position
·         No indication
·         Y SYS LO PRESSURE ECAM warning and Y system label colour is amber
in HYD page.
·         Y SYS LO PRESSURE ECAM warning and system pressure indication reading
      psi in HYD page
·         Y SYS label colour is amber and system pressure ) psi in Hydraulic page without
ECAM warning.

4.    How will you recover the yellow system if it is lose due to LO LVL ?
·         Yellow system can be recovered in approach only by electric pump
·         Yellow system can be recovered in approach only by PTU
·         Yellow system cannot be recovered.
·         Both (a) and (b) are correct.

5.    What are the indications in the cockpit due to yellow reservoir OVHT ?
·         PTU, yellow EDP fault lights with ECAM message and master caution.
·         PTU, yellow EDP, yellow electric pump fault lights with ECAM message
and master caution.
·         As in (b) but yellow electric pump fault light illuminate only when the
switch is ON yellow.
·         Yellow EDP, yellow electric pump fault lights with ECAM warning.

6.       Fluid can be transferred between hydraulic systems.
·          True
·           False

7.       Which hydraulic systems have engine driven pumps?
·         Green and blue.
·         Green and yellow.
·         Blue and yellow.

8.       The Load Alleviation Function (LAF) accumulators are pressurized by which hydraulic systems?
·         Green and blue.
·         Green and yellow.
·         Blue and yellow.

9.       The RAT pressurizes the Blue hydraulic system to approximately ______ psi.
·          1500
·           2500
·           3000
·           3500

10.   How many pumps has the yellow system to provide pressure (not counting the PTU)?
·           1
·           2
·           3
·           4

11.   The hand pump supplies yellow system pressure to the:
·           Normal brakes.
·           Alternate brakes
·           Passenger doors.
·           Cargo doors.

12.   It is possible to pressurize the green hydraulic system on the ground via the PTU when the parking brake is set.
·           True
·           False

13.   The Eng Pump Fault light extinguishes when the engine pump switch is selected to off except for:
·         Reservoir low level.
·         Pump low pressure.
·         An overheat.

14.   With the airplane on the ground and the blue electric pump switch in AUTO; the blue pump will be energized when:
·           One engine is running.
·           The BLUE PUMP OVRD switch has been pressed.
·           First two statements are correct .

15.   The PTU Fault light illuminates when the:
·         PTU is inoperative.
·         Green or yellow reservoir has low air pressure.
·          PTU pump has overheated.


16.   The PUMP identification number on the ECAM HYD page becomes amber when:
·           System pressure is below 1450 psi.
·           N2 is below idle.
·           The reservoir level is low.

17.   The _____ hydraulic system provides power for gear extension/retraction.
·           Yellow.
·           Blue
·           Green

18.   As long as the landing gear lever is up a hydraulic safety valve closes to cut off the hydraulic supply to the gear when the airspeed is:
·           Greater than 260 KIAS.
·           Greater than 230 KIAS.
·           Less than 260 KIAS.
·           Less than 230 KIAS

19.   Autobraking is initiated by:
·           Strut compression.
·           Reverser action.
·           Ground spoiler extension command.

20.   The alternate brake system has the same capabilities as normal brakes except:
·          Anti-skid is inoperative.
·          Autobrakes are inoperative.
·          Both first statements are correct

21.   When using the alternate brake system on accumulator pressure only; the accumulator supplies:
·          Partial brakes.
·          At least seven full brake applications.
·          Alternate brakes with antiskid.

22.   The maximum degrees of nosewheel steering available when using the handwheel is ______.
·         +/- 60
·         +/- 75
·         +/- 95
·         +/- 105

23.   The green DECEL light on the Autobrake switch illuminates when the actual airplane deceleration corresponds to ______ % of the selected rate.
·           80
·           95
·           100
·           110

24.   The brakes pressure indication on TRIPLE PRESSURE INDICATOR reads which system pressure?
·           Yellow
·           Blue
·           Green

25.   To extend the landing gear with the Gravity Extension Handcrank requires _______ turns of the handle.
·           3 counter-clockwise
·           2 counter-clockwise
·           3 clockwise

26.   The aircraft's three hydraulic systems are normally pressurized by:
·           Two engine driven pumps and one electric pump.
·           Two electric pumps and one PTU.
·           Two electric pumps and one engine driven pump.
·           Two electric pumps and two engine driven pumps.

27.   When will the yellow system electric pump operate? (AC power is available).
·           During the second engine start.
·           When the first engine MASTER switch is moved to the ON position.
·           If any N2 RPM is less than 45%.
·           When the yellow electric system ELEC PUMP push button is selected to ON or the ground crew activates a cargo door switch.

28.   What are the major equipment losses with loss of Green system?
·           Speed Brakes.
·           Nosewheel steering, Autobrakes. …(as old Fcom , NWS on yellow in new fcom )
·           Alternate Brakes.
·           The upper and lower rudders.

29.   The hydraulic PTU will activate if:
·           A significant pressure loss occurs in any of the three hydraulic systems.
·           A significant pressure loss occurs in the green or yellow hydraulic system.
·         Both are correct.

30.   After extending the RAT, is it possible to check its position and status?
·           Check to see if the blue system ELEC PUMP FAULT light is not illuminated.
·           Yes, select the ECAM ELEC page.
·           Yes, select the ECAM HYD page.
·           No. It is not possible.

31.   The RAT is capable of powering a pump which will pressurize:
·           Only the blue system.
·           All systems.
·           The blue and yellow system.
·           The blue and green system.

32.   How is the yellow hydraulic system pressurized?
·           An engine driven pump, an electric pump, the PTU using the green system and, for the cargo doors only, a hand pump.
·           An engine driven pump, electric pump, the PTU using the blue system and, for the cargo doors only, a hand pump.
·           An engine driven pump, an electric pump, and the PTU using the green system.

33.   When will normal operation of the BLUE system hydraulic pump begin?
·           During the first engine start.
·           When the first engine MASTER switch is moved to the ON position.
·           Only when the RAT is deployed.
·           After both engines are started.

34.   The PTU comes into action automatically when the differential pressure between the GREEN and the YELLOW systems is greater than ______ psi.
·           300.
·           500.
·           650.
·           700.

35.   When will the yellow system electric pump operate? (AC power is available)
·           During the second engine start.
·           When the yellow electric system ELEC PUMP push button is selected to ON or the ground crew activates a cargo door switch.
·           If any N2 RPM is less than 45%.
·           When the first engine MASTER switch is moved to the ON position.

36.   What is the normal pressure in the hydraulic system?
·           500 psi.
·           1,000 psi.
·           3,000 psi.
·           2,000 psi

37.   You are at the gate. You have started engine #2. Before starting engine #1, you notice that the PTU test has not been activated. Is it normal.
·           No. You have to call the mechanics.
·           The PTU has been shutoff
·           The PTU will not work until the second engine has been started.

38.   You get a G RSVR OVHT message. Why does the ECAM procedure ask you to switch the PTU off first?
·           To prevent the hot hydraulic fluid from being transferred to the YELLOW system.
·           To depressurize the YELLOW and GREEN systems.
·           To prevent the BLUE system from pressurizing the GREEN system.
·           To prevent the PTU from pressurizing the GREEN system

39.   For hydraulic system malfunctions, when will the RAT deploy?
·           Automatically with the failure of both the green and blue hydraulic systems.
·           Automatically with the failure of both the green and yellow hydraulic systems.
·           Only when the guarded RAT MAN ON push button is selected by the crew.
·           When airspeed drops below 100 knots with the gear up.

40.   What does the RAT MAN ON switch do?
·           Extends RAT, pressurizes BLUE system, starts Emergency Generator.
·           Extends RAT, must push RAT MAN ON again to pressurize BLUE system.
·           Extends RAT, pressurizes GREEN system, starts Emergency Generator.
·           Extends RAT, pressurizes BLUE system, does not start Emergency Generator.

41.   Describe the PTU status with a green system reservoir overheat, low pressure or low fluid level.
·           The PTU will be inhibited
·           The crew must select the PTU ON.
·           The PTU fault light will remain illuminated as long as the problem exists. The PTU should be  selected OFF.
·           The crew must select the PTU OFF then ON

42.   During engine start up, when is the BLUE hydraulic system pressurized?
·           As soon as the PTU is turned on.
·           As soon as the BLUE electric pump is manually turned on.
·           Automatically after first engine start.
·           As soon as the engine master switch is set to IGN/START

43.   If you lost the GREEN system, what equipment is lost?
·           Reverser 1 and gear retraction. …………………. As in  New Fcom
·           Reverser 1, gear retraction and nose wheel steering. ………..  as in old Fcom
·           Reverser 2, gear retraction, cargo doors and nose wheel steering.
·           Reverser 2 and gear retraction.

44.   Crew members can use a hand pump to pressurize the YELLOW system in order to operate the cargo doors when no electrical power is available.
·           True.
·           False.

45.   If you lost the YELLOW system, what equipment is lost?
·          Reverser 2
·          Parking brake accumulator recharging
·          Cargo door.
·           All of the above.

46.   On the hydraulic quantity indicator what does the amber level indicate?
·         The warning level.
·         The reservoir contents
·         The normal filling level
·         The temperature of the hydraulic fluid.

47.   What does a PTU FAULT light indicate?
·           GREEN or YELLOW reservoir overheat.
·           GREEN or YELLOW reservoir low air pressure.
·           GREEN or YELLOW reservoir low level..
·           All of the above.

48.   If you lost the BLUE system, what equipment is lost?
·         The Emergency generator.
·         Cargo door
·         Nose wheel sterring.
·         All of the above.

49.   All hydraulic systems have a fire shutoff valve.
·           True.
·           False.

50.   What is the signification of an amber RAT indicator (ECAM HYD page)?
·           The RAT is uncorrectly stowed.
·           The RAT is not stowed.
·           Pressure for stowing the RAT has been applied, or the RAT pump is not available.

51.   How can the pilot switch off the Fire Shut Off Valves?
·           By de-pressing the Hydraulic Shut Off Switches.
·           By selecting the Hydraulic Valve Switch to the \"Closed\" position
·           By de-pressing the Engine Fire Swithces









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