Pneumatics

Question 1

Pneumatics can be provided by_______and is automatically controlled by 2________s.

Pneumatics can be monitored by viewing the _________page

Answer 1

Engines, APU, external air source.

Bleed monitoring computers-BMC

Bleed

Question 2

Engines will provide either ______or ______pressure

Answer 2

Intermediate Pressure-IP
High pressure- HP

Question 3

APU and External air both connect to the ______of the crossbleed valve

Answer 3

Left

Question 4

Pneumatic system users

Answer 4

Air Conditioning
pressurization
Ventilation
Engine Starting
Wing Anti-ice

Hyd reservoir pressurization
Water pressurization

Question 5

IP stage primary source of air during flight. HP helps out when insufficient from IP stage.

When would this be?

Answer 5

Idle thrust descent
Idle on ground

Question 6

Are HP and IP used at the same time?

Answer 6

No

Check valve preventing it. This is all controlled by BCU.
(Check valve not represented on Bleed ECAM page)

Question 7

Engine Bleed valves and APU valve are spring loaded _______.

Answer 7

Closed in absence of airflow.

Question 8

BMC command bleed valve to close when

Answer 8

Bleed leak is detected
Over pressure or temperature is sensed
Reverse flow is sensed
APU bleed selected on
ENG BLEED pb is selected off
ENG FIRE pb is pressed

Question 9

Engine bleed air passes through a pre cooler that uses ______air

Answer 9

Fan air

Temperature displayed on ECAM is post cooler.

Question 10

APU bleed air is prohibited above

Answer 10

20,000’

Question 11

APU bleed air takes priority over engine bleed air.

When selected on there will be an ECAM display of
APU BLEED

Question 12

The crossbleed valve is closed for 1 of 2 reasons

Answer 12

X BLEED knob is on shut position

X BLEED knob is in auto and APU bleed valve is not open.

Also in auto the valve will automatically close in response to a bleed leak.

Question 13

When external HP ground air is used you must manually open the

Answer 13

Crossfeed valve. You will get bleed air temperature and pressure on bleed page.

Cannot use with another source of air.

Question 14

BMC are used for each engine bleed system. In normal ops BMC 1 controls

Answer 14

Crossflow calve and APU.

Question 15

BMC detect leaks and contain it by_______

Answer 15

Closing associated Bleed valves or crossbleed valve as needed

Crossbleed will not close when selected manually to open.

Question 16

For an air wing leak to be detected it must be _______

Answer 16

Detected by both loops or if 1 is inop be detected by remaining loop.