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ERJ 175 QUESTIONS AND ANSWERS
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ERJ 175 QUESTIONS AND ANSWERS
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ERJ 175 QUESTIONS AND ANSWERSHow many cabin doors provide access to the aircraft cabin? - Answers-4
How many cargo compartments are on the ERJ 175? - Answers-2
Are both cargo compartments pressurized? - Answers-Yes
Can the DV windowns be removed by the crew? - Answers-No
Are fault(s) in the water system monitored from the cockpit? - Answers-No
What is the purpose of the Ramp Horn installed in the cockpit? - Answers-To call ground
personnel via a continous horn sound (when pressed)
When pressing the annuciators test button all striped bars and caption indicators
illuminate except? - Answers-∙ EMRG/PRKG BRAKE light
∙ GPU pushbutton light
∙ Fire test lights
How is a "bad" DVDR test alerted? - Answers-Indicated by a CVR AFT (FWD) FAIL
advisory message on the EICAS when the TEST button on the DVDR unit is pressed
Where can the oxygen quantity be read? - Answers-∙ MFD STATUS page (corrected for
temp) &
∙ At the oxygen cylinder panel (uncorrected for temperature)
Do the cockpit crew and the passengers share the same emergency oxygen? -
Answers-No, the cockpit uses an oxygen cylinder and cabin passengers use oxygen
chemical generators.
Once a chemical oxygen generator (cabin) is activated, can it be shut off? - Answers-No
What is the minimum oxygen for the cockpit crew? - Answers-3 crew: green for 3
2 crew: blue for 2
What activates when the flight deck oxygen masks are removed from their storage unit?
- Answers-∙ Flow oxygen
∙ Mask microphone
∙ Flight deck speakers
What happens if the TEST/REST button is pressed with the flight deck oxygen masks
not stowed? - Answers-∙ Stops flow of oxygen
∙ Deactivates mask microphone
∙ Deactivates fight deck speakers
,What are the different modes of the cockpit quick donning O2 mask? - Answers-∙
Emergency setting - pure oxygen with positive pressure
∙ 100% setting - pure oxygen at all altitudes
∙ Normal setting - oxygen/air mixture (ration depends on cabin altitude)
During preflight, how would you know if the cockpit crew oxygen had been over
pressurized? - Answers-The green blowout disc would be missing on the forward right
side of the fuselage
What is the oxygen duration of an oxygen chemical generator? - Answers-12 minutes
When will the passenger oxygen masks automatically deploy? - Answers-cabin altitude
of 14,000 msl
Can the oxygen door dispensing units be opened manually if it fails to automatically
deploy? - Answers-Yes, via a manual release tool (MRT) located at each FA station.
What does the PBE provide? - Answers-∙ Pressuried(?) oxygen and protection from
smoke, fumes, and fire up to 40,000ft for at least 15 minutes.
∙ Blue indication: Good
∙ Pink: Bad
∙ Vaccuum loss: Bad, even with blue indication
How many portable oxygen cylinders are installed in the cabin? - Answers-3 - one in the
FWD section and 2 in the AFT section
2 masks per cylinder
List some of the emergency equipment items located within the cockpit? - Answers-Fire
Ext
PBE
3 life vests
crash axe
2 escape ropes
3 O₂ masks
What is bleed air used for? - Answers-∙ ECS (heating & cooling)
∙ engine start
∙ engine and wing anti-icing
∙ water pressurization
What is external pneumatic air used for? - Answers-∙ ECS on the ground
∙ Engine start on the ground
Where is the external ground source panel located? - Answers-Lower fairing between
the wings
, What is the Primary use for the APU bleed air? - Answers-∙ ECS on the ground
∙ Engine starting on the ground
∙ Assist with engine start (<FL210)
∙ Bleed source for pressurization, heating, cooling (<15,000' MSL)
Can engine bleed air flow-back to the APU? - Answers-No. A check valve presents flow
back.
Where is bleed air taped from the engines? - Answers-∙ 6th and 10th stage compressors
(EBV and HSV respectively)
∙ system alternates between valves to regulate an adequate and safe pressure
What is the purpose of the pre-cooler? - Answers-cools the bleeds air coming from the
engine to the AMS
What does the overheat detection system (ODS) observe? - Answers-∙ engine bleeds
and packs
∙ APU bleed
∙ plumbing for the wing and engine anti-icing system
Is one detection loop capable of detecting an overheat condition? - Answers-Yes, (if one
fails the other will work alone to detect the overheat)
How many ECS packs are installed? - Answers-2 independent packs (left and right)
Can a single ECS pack proved temperature control and pressurization? - Answers-Yes,
but limited to operations at or below FL 310
Can a single bleed source power both the ECS pack? - Answers-Yes
through the crossbleed valve
When are the recirculation fans commanded off? - Answers-∙ cockpit switch
∙ smoke detected in the recirc bay
∙ DUMP button is pressed
∙ respective pack is commanded off
What keeps the 3 avionic E-bays cool? - Answers-∙ FWD & CTR E-bay fans (3) pull ar
from cabin to E-bay
∙ AFT E-bay natural air-flow from cabin to bay
When is the emergency ram air ventilation activated? - Answers-∙ both packs
commanded or failed OFF below 25,000' (via left side and electronically controlled)
∙ ram air pressure greater than cabin pressure (via right side)
How is the APU controlled? - Answers-dedicated FADEC
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