APU

Question 1

407. Which of the following statement is true?a. The APU is supplied by the aircraft fuel system via 2 APU fuel pumps (forward or aft).
     b. The APU is supplied by its own fuel reservoir.
     c. The APU supplied by the aircraft fuel system via the single APU fuel pump.

Answer 1

a. The APU is supplied by the aircraft fuel system via 2 APU fuel pumps (forward or aft).

Question 2

408. During take-off and go-around the APU can supply pneumatics:a. to reduce pressure changes for greater passenger comfort
     b. to increase bleed pressure at high engine RPM
     c. to increase aircraft performance during critical phases of flight

Answer 2

c. to increase aircraft performance during critical phases of flight

Question 3

409. On the ground with engines not running the APU can be started using:a. all three aircraft batteries
     b. the engine bleed air
     c. the APU battery

Answer 3

a. all three aircraft batteries

Question 4

410. Before the APU starter is energized:a. the APU bleed switch must be deselected
     b. both APU fuel pumps must be selected on
     c. the APU air intake flap must be fully opened

Answer 4

c. the APU air intake flap must be fully opened

Question 5

411. An APU emergency shutdown will occur:a. whenever a fire is detected by the ECB
     b. when a fire is detected in flight
     c. when a fire is detected on ground

Answer 5

c. when a fire is detected on ground

Question 6

412. In flight, if the APU is started on batteries only:a. the APU will not start
     b. the APU may be started up to FL 410
     c. the APU start is limited to FL 250

Answer 6

c. the APU start is limited to FL 250

Question 7

413. If APU is operating during flight:a. you may use APU ELEC plus bleed air up to FL 225
     b. use of electric power only is restricted to FL 250
     c. there are no altitude restrictions on use of APU electrics or bleed air

Answer 7

a. you may use APU ELEC plus bleed air up to FL 225

Question 8

414. A 60 minutes cool down period must be observed:a. after three start attempts without a cool down
     b. after two consecutive start attempts
     c. after two start attempts provided a 1 minute cool down was observed after the first start

Answer 8

a. after three start attempts without a cool down

Question 9

415. During start sequence green AVAIL appears:a. when the APU speed is above 95%
     b. when the APU supplies pneumatic network
     c. when the APU supplies electrical network

Answer 9

a. when the APU speed is above 95%

Question 10

416. On ECAM APU page, the N, EGT and pressure values are presented by amber XXs values. What does it mean?a. All APU operating limitations have been exceeded
     b. The APU is operating in backup mode
     c. Data concerning the APU is not available

Answer 10

c. Data concerning the APU is not available

Question 11

417. Before APU start the ECAM shows DOOR/OXY page. To be able to view the APU ECAM page during APU start:a. the pilot must “clear” the ECAM page to display the APU page
     b. the pilot simply selects the APU MASTER SW to ON/R
     c. the APU ECAM page will not be available until after the APU has started

Answer 11

b. the pilot simply selects the APU MASTER SW to ON/R

Question 12

418. Green “LOW OIL LEVEL” advisory message on ECAM APU page is set by the:a. SDAC
     b. ECB
     c. FCDC

Answer 12

b. ECB

Question 13

419. To shutdown the APU, the pilot must:a. select the APU START pb to off
     b. select the APU MASTER pb to off
     c. select both the APU START and MASTER switch to off

Answer 13

b. select the APU MASTER pb to off

Question 14

420. An emergency shutdown of the APU can be performed from the:a. Refuel/Defuel panel and blue hydraulic service panel
     b. Refuel/Defuel panel, external power panel and APU fire pb
     c. APU cannot be shutdown from outside the aircraft

Answer 14

b. Refuel/Defuel panel, external power panel and
APU fire pb