System Review PTM CH-09 (Pneumatics)

Question 1

Pneumatic air is supplied in high-pressure mode (HP) or low-pressure mode (LP) from where?

Answer 1

Engine or APU bleed air.

Question 2

Can high-pressure mode (HP) and low-pressure mode (LP) be used simultaneously?

Answer 2

No.

Question 3

Does the APU BLEED AIR button need to be on for service air availability?

Answer 3

No. Available any time either engine or the APU is running.

Question 4

Service Air ensures what two functions?

Answer 4

It keeps the ACM outlet above freezing and holds the Cabin Recirculation valve in the open position.

Question 5

Is bleed air leak detection available throughout the system?

Answer 5

Yes.

Question 6

Does the TAIL BLEED LEAK (Amber) EICAS automatically close associated valves?

Answer 6

No.

Question 7

Does the BLD LEAK (Amber) EICAS automatically close associated valves?

Answer 7

Yes.

Question 8

What cools the Engine Bleed Air?

Answer 8

Pylon bypass air.

Question 9

APU Bleed Air can be used in place of Engine Bleed Air except for?

Answer 9

Anti-Ice and Emergency Pressurization.

Question 10

The PRESS SOURCE selector controls bleed air from engines for environmental and pressurization systems?

Answer 10

True.

Question 11

EMER PRESS activates when?

Answer 11

An ACM overheat, ACM bleed leak, or if cabin altitude exceeds 14,500 ft.

Question 12

When in EMER Press where does bleed air come from?

Answer 12

The left engine.

Question 13

What position do the HP shutoff valves, BLD AIR shutoff, valves, and both mass flow valves go with loss of DC power?

Answer 13

The open position.