APU

Question 0

The APU is a source of _______ and ________ power on the ground or in flight

Answer 0

Bleed Air

Electrical

Question 1

The EMB-135BJ is equipped with a Sundstandar ___________ APU.

Answer 1

T-62T-40C14

Question 2

Control of the C14 is performed by a ____________

Answer 2

FADEC

Question 3

Fuel Supply for the APU normally comes from the _____ wing

Answer 3

Right

Question 4

The APU is located in the tailcone of the aircraft and isolated by a _________ firewall

Answer 4

Titanimum

Question 5

The APU FADEC control receives electrical power from the __________ DC bus.

Answer 5

Essential

Question 6

Overspeed or underspeed is specified as ___________ faults that will result in immediate ____________ of the APU on the ground or in flight.

Answer 6

Critical

Shutdown

Question 7

The Max EGT for APU start _______ ºC, and _______ ºC for steady state operations which can be exceeded up to a temperature of _________ ºC for 3 minutes or ________ ºC for 5 minutes

Answer 7

884

680

732

717

Question 8

The APU starter-generator is rated at ______ amps below ___________ feet and _______ amps above __________ feet. The starter-generator operates in __________ with the aircraft battery and/or with the main engine generators during all phases of flight.

Answer 8

400

30,000

300

30,000

Parallel

Question 9

The APU Fuel Shutoff guarded overhead button shuts off fuel to the APU via the APU fuel line _______________

Answer 9

Shutoff Valve

Question 10

The APU fire extinguishing button closes the ______________ valve and discharges the APU ___________

Answer 10

APU Shutoff

Fire Bottle

Question 11

Turning the APU Master knob on energizes the __________ and commands the ____________ valve to open

Answer 11

FADEC

APU Main Fuel

Question 12

The pneumatic system gives priority to _______ bleed air over _______ bleed air.

Answer 12

Engine

APU

Question 13

When the APU generator is operative, it is normally connected in ___________ to the ____________

Answer 13

2 Main

Parallel

Question 14

Pressing the APU _______ button is the normal method of shutting down the APU.

Answer 14

Stop

Question 15

The APU Master knob should not be moved to the off position until the APR RPM has dropped below ______ %

Answer 15

10

Question 16

The maximum altitude for APU starting is ___________ feet.

Answer 16

30,000

Question 17

The maximum altitude for APU Operation is ____________ feet, If extracting bleed air, the maximum altitude is reduced to _________ feet.

Answer 17

39,000

37,000

Question 18

The minimum battery temperature for APU start is ______ ºC

Answer 18

-20

Question 19

The rest period after the first two APU start attempts is _____ sec and _______ minutes after the third attempt.

Answer 19

60

30

Question 20

List the APU critical faults:
___________ ____________
___________ ____________
___________ ____________

Answer 20

FADEC Failure

Overspeed / Underspeed

Failure to light / start

External Short

Failure to Accelerate

Loss of Speed Data

Question 21

List the APU major faults:
_____________ ___________
_____________ ___________
_____________ ___________

Answer 21

Low oil pressure

EGT overtemperature

High oil temperature

Oil pressure switch shorted

Shorted / Open thermocouple

Loss of EGT

Question 22

In case of an APU FIRE message, the memory item is:

Answer 22

APU FUEL SHUTOFF VALVE PUSH OUT