2 - A.P.U

Question 1

1. (DSC-49-20) When the Apu master switch is released, a normal Apu shutdown occurs;

(a) Without delay in all cases.
(b) With a delay in all cases.
(c) With a delay if the bleed air was in use.
(d) Only after the main batteries are switched off.

Answer 1

(c) With a delay if the bleed air was in use.

Question 2

2. (DSC-49-10) What are the apu manual shut down possibilities in the cockpit;

(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.

Answer 2

(a) Apu master switch push button, Apu fire push button switch.

Question 3

3. (LIM-49) Normal electrical system being available, you may restart the apu up to;

(a) 31,000 ft.
(b) 20,000 ft.
(c) 41,000 ft.
(d) 45,000 ft.

Answer 3

(c) 41,000 ft.

Question 4

4. (DSC-49-10) When the Apu is running, the Apu fuel pump;

(a) Runs when the tank pump pressure is not sufficient.
(b) Runs all the time.
(c) Runs only in flight.
(d) Runs when the Apu fuel pump is selected on.

Answer 4

(a) Runs when the tank pump pressure is not sufficient.

Question 5

5. (DSC-49-10) Normal Apu rotation speed (N%) is;

(a) 99% ( Ground, nil bleed demand, OAT > 18c <35c)
(b) Always steady at 99 %.
(c) Always 80 %
(d) Always 75 %.

Answer 5

(a) 99% ( Ground, nil bleed demand, OAT > 18c <35c)

Question 6

6. (DSC-49-20) Apu master switch selected on;

(a) On illuminates blue, Apu system is supplied and Apu starts at 95%, Avail comes on.

(b) On illuminates blue, Apu system is supplied, Apu starts as soon as start P/b is depressed and intake flap opens.

(c) Apu fuel pump runs immediately.

(d) On illuminates green and Apu starts.

Answer 6

(b) On illuminates blue, Apu system is supplied, Apu starts as soon as start P/b is depressed and intake flap opens.

Question 7

7. (DSC-49-10) Apu bleed air is controlled;

(a) By ECB ( N% adjustment)

(b) Not controlled.

(c) By Apu bleed valve, which operates as a shut off valve.

(d) By pack flow switch Lo/Norm/Hi on overhead panel.

Answer 7

a) By ECB ( N% adjustment)

Question 8

8. (DSC-49-20) Apu N indication becomes amber on ECAM SD, when;

(a) N >/= 107 %.
(b) N >/= 102 %.
(c) N >/= 99 %.
(d) N >/= 95 %.

Answer 8

(b) N >/= 102 %.

Question 9

9. (DSC-49-20) Apu EGT indication becomes red on ECAM SD, when;

(a) EGT >/= 715 c ( Apu running)
(b) EGT >/=1038 c ( Apu running)
(c) EGT >/= 675 c (Apu running) or EGT . 1090 c (during apu start).
(d) EGT .> 950 c.

Answer 9

c) EGT >/= 675 c (Apu running) or EGT . 1090 c (during apu start).

Question 10

10. (DSC-49-10) On ground, Apu provides;

(a) Electrical power & hydraulic power.
(b) Electrical power & bleed air.
(c) Hydraulic power & bleed air.
(d) Hydraulic power & electrical power.

Answer 10

(b) Electrical power & bleed air.

Question 11

11. (LIM-49) Air Bleed extraction for wing anti-ice:

(a) Is permitted.
(b) Is not permitted.
(c) Is permitted only on ground.
d) Is permitted only in flight.

Answer 11

(b) Is not permitted.

Question 12

12. (DSC-49-10) Can you start the Apu using the a/c batteries:

(a) Yes.
(b) No.
(c) Only on the ground.
d) Only in flight.

Answer 12

(a) Yes

Question 13

13. (DSC-49-10) The Apu is supplied from the:

(a) Left fuel feed line.
(b) Right fuel feed line.
(c) Centre tank always.
(d) Right inner tank always.

Answer 13

(a) Left fuel feed line.

Question 14

14. (DSC-49-20) If air bleed was used, after a manual shut down sequence the apu:

(a) Stops immediately.
(b) Keeps running for four minutes.
(c) Keeps running for between 60 sec.
(d) Keeps running for 10 mins.

Answer 14

(c) Keeps running for between 60 sec.

Question 15

15. (DSC-49-20) Avail light illuminates on start p/b when;

(a) External power is disconnected.
(b) 2 seconds after Apu N reaches 95 %.
(c) Apu electric power is used.
(d) Main engine generator is on line.

Answer 15

(b) 2 seconds after Apu N reaches 95 %.

Question 16

16. (DSC-49-10) The Apu has its own lubrication system;

(a) Yes.
(b) No.
(c) No, it is lubricated and cooled by hydraulic fluid from the green system.
(d) No, it uses the same oil as engine no. 2.

Answer 16

(a) Yes.

Question 17

17. (DSC-49-10) What determines the Apu speed in accordance with air bleed demand;

(a) Electronic control box.
(b) Air conditioning system.
(c) Air intake system.
(d) Main engine RPM.

Answer 17

(a) Electronic control box.

Question 18

18. (DSC-49-10) Besides the master switch on the cockpit Apu panel, Apu shutdown is possible by;

(a) Switching off the left fuel pumps.

(b) Switching off the right fuel pumps.

(c) Turning off both main batteries.

(d) Pressing the Apu Shut Off push button on the external interphone panel or pushing the APU fire pushbutton (o/head fire p/b).

Answer 18

(d) Pressing the Apu Shut Off push button on the external interphone panel or pushing the APU fire pushbutton (o/head fire p/b).

Question 19

19. (LIM-49) The supply of electrical power has priority over bleed air supply;

(a) No.
(b) Yes.
(c) Only above 25000 feet
(d) Only when the ditching pushbutton has been selected on.

Answer 19

(b) Yes.

Question 20

20. (DSC-49-20) Master switch on, the ;

(a) Apu starts.
(b) ECB is electrically supplied.
(c) Air intake flap closes.
(d) Apu fuel pump starts immediately.

Answer 20

(b) ECB is electrically supplied.