SKYWEST ERJ 175 SYSTEMS EXAM QUESTIONS
WITH 100% VERIFIED ANSWERS 2024-2025
What type of checklist is Safety and Power Up? - ANSWER Captain or FO: Read
and do the checklist
What is the minimum battery voltage for normal operation? - ANSWER: 22.5V
What external power sources are available for the ERJ 175? - Answer: Both AC
and DC
Which displays should appear once you turn on Batteries 1 and 2? - ANSWERS 2
and 3.
Which areas have fire detection and protection? - ANSWER Engines, APU, Cargo
Compartments (aft and forward), Lavatories
When must the safety and power-up checklists be completed? - ANSWER The first
flight of the day in a specific plane, or when a power down was necessary.
Emergency Equipment - ANSWER Flashlight - both CA and FO, Life Vest - CA,
FO, and jumpseat, Circuit Breakers - CA, FO, Escape Rope - CA, FO, Landing
Gear and RAT Safety Pin - FO, PBE and Halon Fire Extinguisher and Crash Axe -
Doorway, Oxygen and Headset - Observer Seat.
What are you searching for when battery 1 is on and battery 2 is auto - ANSWER
1) Screens 2 (status page) and 3 (EICAS) should flash 2) IESS powering up (90
seconds alignment) 3) Battery Voltage (Min 22.5V for normal operations, 21.0 -
22.5 Recharge procedure, less than 20.9 - call maintenance)
,What is the relevance of 22.5V? ANSWER: 22.5V should provide enough power
for 10 minutes of battery power with two APU restart attempts.
What do we check for during the Fire Extinguisher Test? - ANSWER 6 - 5 - 2 - 2 -
2 6 lights on the overhead panel, 5 EICAS messages, 2 Master Warnings, 2 ITT
Fires, and 2 Aural Warnings
APU FADEC will switch off if: ANSWER In-Flight: UFO U-underspeed,
F-FADEC critical fault, O-overspeed Ground: UFO SHELF S-sensor fail, H-high
oil temperature, E-EGT (high), L-low oil pressure, F-fire.
APU FADEC fire detection automated - ANSWER On Ground: 10 seconds latency
while turning it off. Anytime: One minute later, the APU emergency stop button
will illuminate.
How many Cargo Fire Halon Extinguishers are there? Differences? Usage? -
ANSWER 2: When the button is pressed, the high-rate halon extinguisher fires.
The low rate continues to fire in short bursts for 75 minutes.
Cargo fire extinguisher with EICAS message usage - ANSWER With message (IN
FLIGHT), the button will blow the high-rate and then automatically discharge the
low-rate one minute later. (GROUND) Pushing the button will just blow the high
rate. The button must be pressed again for the low-rate bottle.
Cargo fire extinguisher without EICAS message use - ANSWER (IN FLIGHT) hit
the button twice, the low rate is automatic. (GROUND) Push the button twice, and
only the high-rate alarm will sound. Push the button one more for the low-rate
bottle.
What are the electrical power sources? ANSWER: DC Power - Battery, AC Power
- GPU, APU, IDG. When all fails, the RAC takes over.
,What exactly is the TRU? - ANSWER: The transformer rectifier unit converts AC
to DC.
APU Max Restarting Altitude - Answer: 30,000 ft.
APU Max Operating Altitude - Answer: 33,000 feet.
Logic for AC powering up sources - ANSWER: Onside, Inside, Outside, and
CrossSide
What should be done with the Safety and PowerUp Checklist if you receive an
aircraft that is already powered up? - ANSWER It must be certified compliant, and
the fire panel test must be completed.
What would you do if you discovered a 20.5V battery when you turned on the
power? - ANSWER: Call maintenance.
After starting the left engine with the APU turned on, which generator will power
AC Bus 2 (Right Engine Not Running)? - ANSWER APU Generator
Will leaving the GPU button held after disconnecting from AC external power
work? - ANSWER: You will not be able to reconnect to AC power until the button
is repressed.
How many times must you press the Aft Cargo button to release the low-rate fire
bottle while there is no announced Aft Cargo fire on the ground? - Answer three.
What is the originating flow? - ANSWER: Anytime maintenance is conducted.
Except for the ailerons, all main and secondary flight controls use fly-by-wire
technology.
, What is the alternate mode of flight control operation if the primary mode fails? -
Answer in direct mode.
The originating flow is completed on the first flight of the day. - The answer is true.
What is the main purpose of the power transfer unit (PTU)? - ANSWER Assist
with landing gear extension and retraction
Which are the primary flight controls? - ANSWER Ailerons, which contain the
multifunctional roll spoilers, elevators, and rudder
What about the secondary flight controls? - ANSWER: Horizontal stabilizer, flaps
and slats, multi-function spoiler, dedicated ground spoilers.
What is the principal function and purpose of the FCM (flight control modules) -
ANSWER This is the brain - the computer that decides whether or not to move the
rudder, elevator, and spoiler.
What are the four ACE (Actuator Control Electronics)? - ANSWER ACE is the
signal box that converts our control inputs into electronic signals that the PCU can
use. P-ACE (primary) Rudder and Elevators S-ACE (spoiler) HS-ACE (horizontal
stabilizer) SF-ACE (slat/flap)
Protections provided by the FMS include: 1) Elevator Thrust Compensation
Function 2) AOA Limiting - Stall Protection Activation 3) Multifunction Spoiler
Operation Mode 4) Rudder Control System Operation Mode 5) Yaw Damper.
What are the three factors that prevent spoilers from engaging or closing if open? -
ANSWER: 1) Low speed < 180 knots. 2) Thrust Lever Angle of 70 degrees. 3)
Flaps 2 or higher.
WITH 100% VERIFIED ANSWERS 2024-2025
What type of checklist is Safety and Power Up? - ANSWER Captain or FO: Read
and do the checklist
What is the minimum battery voltage for normal operation? - ANSWER: 22.5V
What external power sources are available for the ERJ 175? - Answer: Both AC
and DC
Which displays should appear once you turn on Batteries 1 and 2? - ANSWERS 2
and 3.
Which areas have fire detection and protection? - ANSWER Engines, APU, Cargo
Compartments (aft and forward), Lavatories
When must the safety and power-up checklists be completed? - ANSWER The first
flight of the day in a specific plane, or when a power down was necessary.
Emergency Equipment - ANSWER Flashlight - both CA and FO, Life Vest - CA,
FO, and jumpseat, Circuit Breakers - CA, FO, Escape Rope - CA, FO, Landing
Gear and RAT Safety Pin - FO, PBE and Halon Fire Extinguisher and Crash Axe -
Doorway, Oxygen and Headset - Observer Seat.
What are you searching for when battery 1 is on and battery 2 is auto - ANSWER
1) Screens 2 (status page) and 3 (EICAS) should flash 2) IESS powering up (90
seconds alignment) 3) Battery Voltage (Min 22.5V for normal operations, 21.0 -
22.5 Recharge procedure, less than 20.9 - call maintenance)
,What is the relevance of 22.5V? ANSWER: 22.5V should provide enough power
for 10 minutes of battery power with two APU restart attempts.
What do we check for during the Fire Extinguisher Test? - ANSWER 6 - 5 - 2 - 2 -
2 6 lights on the overhead panel, 5 EICAS messages, 2 Master Warnings, 2 ITT
Fires, and 2 Aural Warnings
APU FADEC will switch off if: ANSWER In-Flight: UFO U-underspeed,
F-FADEC critical fault, O-overspeed Ground: UFO SHELF S-sensor fail, H-high
oil temperature, E-EGT (high), L-low oil pressure, F-fire.
APU FADEC fire detection automated - ANSWER On Ground: 10 seconds latency
while turning it off. Anytime: One minute later, the APU emergency stop button
will illuminate.
How many Cargo Fire Halon Extinguishers are there? Differences? Usage? -
ANSWER 2: When the button is pressed, the high-rate halon extinguisher fires.
The low rate continues to fire in short bursts for 75 minutes.
Cargo fire extinguisher with EICAS message usage - ANSWER With message (IN
FLIGHT), the button will blow the high-rate and then automatically discharge the
low-rate one minute later. (GROUND) Pushing the button will just blow the high
rate. The button must be pressed again for the low-rate bottle.
Cargo fire extinguisher without EICAS message use - ANSWER (IN FLIGHT) hit
the button twice, the low rate is automatic. (GROUND) Push the button twice, and
only the high-rate alarm will sound. Push the button one more for the low-rate
bottle.
What are the electrical power sources? ANSWER: DC Power - Battery, AC Power
- GPU, APU, IDG. When all fails, the RAC takes over.
,What exactly is the TRU? - ANSWER: The transformer rectifier unit converts AC
to DC.
APU Max Restarting Altitude - Answer: 30,000 ft.
APU Max Operating Altitude - Answer: 33,000 feet.
Logic for AC powering up sources - ANSWER: Onside, Inside, Outside, and
CrossSide
What should be done with the Safety and PowerUp Checklist if you receive an
aircraft that is already powered up? - ANSWER It must be certified compliant, and
the fire panel test must be completed.
What would you do if you discovered a 20.5V battery when you turned on the
power? - ANSWER: Call maintenance.
After starting the left engine with the APU turned on, which generator will power
AC Bus 2 (Right Engine Not Running)? - ANSWER APU Generator
Will leaving the GPU button held after disconnecting from AC external power
work? - ANSWER: You will not be able to reconnect to AC power until the button
is repressed.
How many times must you press the Aft Cargo button to release the low-rate fire
bottle while there is no announced Aft Cargo fire on the ground? - Answer three.
What is the originating flow? - ANSWER: Anytime maintenance is conducted.
Except for the ailerons, all main and secondary flight controls use fly-by-wire
technology.
, What is the alternate mode of flight control operation if the primary mode fails? -
Answer in direct mode.
The originating flow is completed on the first flight of the day. - The answer is true.
What is the main purpose of the power transfer unit (PTU)? - ANSWER Assist
with landing gear extension and retraction
Which are the primary flight controls? - ANSWER Ailerons, which contain the
multifunctional roll spoilers, elevators, and rudder
What about the secondary flight controls? - ANSWER: Horizontal stabilizer, flaps
and slats, multi-function spoiler, dedicated ground spoilers.
What is the principal function and purpose of the FCM (flight control modules) -
ANSWER This is the brain - the computer that decides whether or not to move the
rudder, elevator, and spoiler.
What are the four ACE (Actuator Control Electronics)? - ANSWER ACE is the
signal box that converts our control inputs into electronic signals that the PCU can
use. P-ACE (primary) Rudder and Elevators S-ACE (spoiler) HS-ACE (horizontal
stabilizer) SF-ACE (slat/flap)
Protections provided by the FMS include: 1) Elevator Thrust Compensation
Function 2) AOA Limiting - Stall Protection Activation 3) Multifunction Spoiler
Operation Mode 4) Rudder Control System Operation Mode 5) Yaw Damper.
What are the three factors that prevent spoilers from engaging or closing if open? -
ANSWER: 1) Low speed < 180 knots. 2) Thrust Lever Angle of 70 degrees. 3)
Flaps 2 or higher.
