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CRJ Pneumatics
Environmental Control Systems CRJ- For Advanced Systems
| Question | Answer |
|---|---|
| How many bleed air pneumatic systems | 2 |
| 10th stage bleed is used for | Starting, air-conditioning, pressurization |
| 14th stage bleed air is used for | Anti ice, thrust reverses |
| Any source of bleed air can pressurize manifold when | Isolation valve is open |
| If electrical power is lost the 10 th stage SOV will | Close due to spring loading |
| APU bleed air is controlled by the | LCV |
| The two ACM packs revive bleed air from | 10th stage or apu |
| How many ram air ducts are there for cooling of bleed air | 1 |
| Pack bleed air is cooled by | Heat exchangers and acm |
| Ram air taken from the scoop is used for cooling | Heat exchangers bleed air |
| Cabin pressure is maintained by | 2 outflow valves |
| Outflow valves maintain a psi differential of | 8.4 psi |
| Pressing emer depr causes | Outflow valves to open |
| Landing field elevation knob is used to | Set destination airport altitude |
| In manual mode the up position allow sthe outflow valves | to Open and cabin altitude to increase |
| In manual mode down position the outflow valves | Close and the cabin altitude decreases |
| How is bleed air directed to wing leading edge for anti ice | Piccolo tubes |
| Where do wings and cowls get bleed air | 14th stage |