Quiz 5 APU/Fire Protection

Question 1

what does the APU provide

Answer 1

DC electrical power
environmental bleed air
both in-ground and in flight

Question 2

Was the Hawker made with the APU

Answer 2

no it was added later via a supplemental-type certificate
(found in the supplement section of the AFM

Question 3

The APU starter/generator power the aircraft electrical system via

Answer 3

PS2

Question 4

Where does the APU get its fuel from

Answer 4

The left tank through the APU fuel shutoff valve

Question 5

What does the stop button on the APU panel do

Answer 5

initiates shut-down of the APU - this button is used to shut down the APU during all normal operation

Question 6

when will the automatic ECU shutdown of the APU occur in flight or on the ground

Answer 6

APU fire
low oil temperature
high oil pressure
DC power interruption of the ECU
Overcurrent to the ECU
loss of EGT signal
High EGT - above red line
overspeed - in excess fo 110%
loss of speed signal

Question 7

Do we monitor the APU? Why?

Answer 7

no - it is self-monitoring to reduce pilot workload

Question 8

Starter Generator when run by APU

Answer 8

as generator it powers the PS2 and PE - will power PS1 if bus tie is closed

Question 9

APU emergency shutoff is located in the

Answer 9

rear equipment bay

Question 10

(limitation) maximum rpm for APU

Answer 10

110%

Question 11

(limitation) Maximum EGT for APU

Answer 11

1350F

Question 12

(limitation) maximum transient EGT

Answer 12

14000F to 15000F for 15 seconds

Question 13

(limitation) what pressure altitude can you not run the APU after

Answer 13

30,000

Question 14

(limitation) what pressure altitude can you not start the APU after

Answer 14

20,000

Question 15

(limitation) when will you shut down the APU if the ready to load light is not illuminated

Answer 15

within 60 seconds

Question 16

(limitation) starter limits for APU

Answer 16

1st and 2nd attempt - 30 second on, 3 minutes off
3rd attempt - 30 seconds on 30 minutes off

Question 17

(limitation) when should you not attempt a restart

Answer 17

both main generators have failed

Question 18

(limitation) When is APU start prohibited

Answer 18

the left engine has been shut down due to fire or engine failure
automatic shut down has occured

Question 19

(limitation) max generator load

Answer 19

.8

Question 20

(limitation) maximum transient generator load

Answer 20

1.2 for less than 10 seconds

Question 21

(limitation) limit for simultaneous operation of the APU and engine bleed are

Answer 21

1 minute

Question 22

(limitation) can the APU be on for icing or anti-icing conditions

Answer 22

NO

Question 23

(limitation) if passengers are on board the aircraft and the APU is on what must also be done

Answer 23

A crew member must be on the aircraft

Question 24

(limitation) what are the rules for refueling and APU

Answer 24

can not be started during a refueling operation
if on during refueling must be refueled by single-point pressure refueling

Question 25

what are the limitations to bleed air

Answer 25

123 1 minute with the main air valves and APU bleed operations running simultaneously 2 minutes run with no load before placing bleed air load on the APU 3 minutes in between start attempts

Question 26

how many indications do we get when there is a fire

Answer 26

6 or 7

Question 27

when would we get 7 fire indications instead of 6

Answer 27

if engine instruments are on the copilot's PFD instead of PIC. If it is on PIC it will be 6 indications

Question 28

What is a fire (or overheat) detected by

Answer 28

fire/overheat responders connected to continuous wire sensor the sensor wire is filled with gas that expands when heated

Question 29

What are the indications of an engine fire

Answer 29

ENG1/2 FIRE look up annunciators ENG FIRE annunciator on the fire panel master warning lights HP Cock warning light warning bell

Question 30

What is our fire extinguisher and where are they located

Answer 30

two dual-head, single shot bottles located aft equipment bay

Question 31

what is each fire extinguisher capable of

Answer 31

it is capable of discharging its total contents into zone one of either engine both bottles can be discharged into either engine or both in the same engine

Question 32

What is shot 1 (fire extinguisher 1)circuit powered by

Answer 32

PE

Question 33

What si Shot 2 (fire extinguisher 2) circuit powered by

Answer 33

PS2

Question 34

What are the fire warning circuits powered by

Answer 34

PE

Question 35

the 2 sensing elements, 2 responders, 2 zones

Answer 35

these tell us something is HOT not that there is a FIRE

Question 36

where are the pressure relief indicators located

Answer 36

under left pylon

Question 37

when will the APU bottle automatically discharge

Answer 37

5 seconds after APU auto-shutdown due to overheat