Atlas 747 Oral Rev. 2 - Engine Bleed Air
Exam Questions & Answers (Grade A+)
The Engine Bleed Air Switches control which valves by system logic,
when bleed air pressure is available? -
correct answer ✅Engine bleed air valve|PRV|HP bleed valve
Describe the general function of pressure regulating valve (PRV). -
correct answer ✅Prevents damage to ducting and equipment
downstream, the PRV limits bleed air pressure.
How are the engine bleed air valves actuated, and when do they
open for forward flow? -
correct answer ✅The bleed air valves are pressure actuated.|They
remain closed until engine bleed air pressure causes forward flow.
With the HP valve failed open and the respective bleed air switch
OFF, will nacelle anti-ice be available? -
correct answer ✅No
An Engine Bleed Air System (SYS) FAULT light indicates what? -
correct answer ✅Bleed air overheat|Bleed air overpressure|HP
bleed valve open when commanded closed|PRV open when
commanded closed
Exam Questions & Answers (Grade A+)
The Engine Bleed Air Switches control which valves by system logic,
when bleed air pressure is available? -
correct answer ✅Engine bleed air valve|PRV|HP bleed valve
Describe the general function of pressure regulating valve (PRV). -
correct answer ✅Prevents damage to ducting and equipment
downstream, the PRV limits bleed air pressure.
How are the engine bleed air valves actuated, and when do they
open for forward flow? -
correct answer ✅The bleed air valves are pressure actuated.|They
remain closed until engine bleed air pressure causes forward flow.
With the HP valve failed open and the respective bleed air switch
OFF, will nacelle anti-ice be available? -
correct answer ✅No
An Engine Bleed Air System (SYS) FAULT light indicates what? -
correct answer ✅Bleed air overheat|Bleed air overpressure|HP
bleed valve open when commanded closed|PRV open when
commanded closed
