08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
Mesa Airlines E-JET Systems EXAM QUESTIONS
AND VERIFIED ANSWERS 2025(GRADED A+)
DETAILED ANSWERS!!
Save
Terms in this set (322)
How many networks make 2 independent networks
up the electrical system Redundancy and fault isolation
on the airplane?
Why?
What happens if a power Bus ties automatically connect to provide no system
generating source fails? degradation
2 Integrated Drive Generators (IDG)
Auxiliary Power Unit (APU)
What components power
Inverter
the AC system?
Ram Air Turbine (RAT)
AC GPU receptacle
2 NiCad batteries
What components power
3 Transformer Rectifier Units (TRU)
the DC system?
DC GPU receptacle
How does the IDG A Constant Speed Drive (CSD) attaches the IDG to
maintain a stable power the AGB (Accessory Gear Box)
output?
What monitors and Each has a Generator Control Unit (GCU)
controls the IDG's?
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,08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
Can one IDG supply the Yes
entire electrical system?
What will cause the amber High oil temperature
IDG light on the overhead Low oil pressure
panel to illuminate?
If an IDG is manually No. This is a maintenance function
disconnected can it be
reconnected by the flight
crew?
What is the primary To power the AC BUSES and AC ESS BUS which...
purpose the AC Power the 3 Transformer Rectifier Units (TRU) 1, 2, and
generators? AC STBY BUS
What is the purpose of the To convert 115 VAC to 28 VDC
Transformer Rectifier
Units?
Can the APU replace a Yes
failed IDG?
Onside (IDG)
What is the AC electrical Inside (APU)
system's priority? Outside (GPU)
Cross-Side (Other IDG)
GPU button displays AVAIL and the GPU icon is
How is it known that an AC
presented on the electrical synoptic page
GPU is hooked up to the
Once the GPU button is pushed in, the button will
airplane and ready to
display IN USE provided another AC power source is
provide electricity?
not available.
What does it mean if the Ground service bus is in use
AC GPU is plugged in and Cockpit GPU button will display AVAIL even though
the outside GPU panel the ground service bus is in use
button displays IN USE?
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,08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
If the airplane is using the Deselect the GPU button before the next GPU
AC GPU and the APU is connection
started what should the
pilot be sure to do?
What will charge the Any AC Power Source
batteries?
How long will the aircraft's 10 minutes
batteries last with no
recharging?
What is the purpose of the For APU start when batteries < 22.0 VDC, or
DC GPU receptacle? If battery temp is < -20°C
What is the minimum -20°C
battery temp for APU
start?
What is the minimum 18 volts
battery voltage to close
the battery bus-ties?
What battery is used for BATT 2 powers the APU Start Bus
the APU start? BATT 1 powers the FADEC & EICAS for monitoring
Converts 28 VDC from the batteries to 115 VAC to
What is the purpose of the
power the AC STANDBY BUS when an AC source is
Inverter?
not available
What is on the AC Engine exciters 1A and 2A
STANDBY BUS?
What powers the Ram Air Airflow turns the RAT propeller which spins the
Turbine (RAT)? turbine inside
When will the RAT Automatically deploys if AC BUSES are not powered
deploy? Manually by pilot
How long after 8 seconds
deployment before the
RAT will supply power?
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, 08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
Is there a total loss of No. Batteries supply power to the DC ESS BUSES and
power during the 8 AC STANDBY BUS
second RAT deployment?
What does the RAT ESS BUSES
power?
What is minimum airspeed 130 KIAS
for the RAT? Load shedding occurs below this speed
When is the RAT icon When the RAT is deployed
displayed on the electrical
synoptic page?
What manages the 4 Integrated Control Centers (ICC)
electrical system? 2 Secondary Power Distribution Assemblies (SPDA)
An electrical control device, which provides power
What is an ICC?
distribution and protection for electrical loads
An electrical load-management unit (powered by the
ICC's) that distributes electrical loads to aircraft
What is an SPDA?
systems according to distribution logic and performs
BITS on many components.
Can the flight crew reset ICC CB's can only be reset by maintenance
the ICC and SPDA remote SPDA CB's can be reset via the MCDU
electronic CBs?
How many fuel tanks does 2 integral tanks
the airplane have?
Where is fuel tank Left tank
temperature taken?
Primary ejector pump
What types of fuel pumps ACMP
are in each wing? DCMP (right tank)
3 scavenge ejector pumps
Venturi pump with no moving parts and no electrical
What is the Primary
power used by the respective engine
ejector pump?
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Mesa Airlines E-JET Systems EXAM QUESTIONS
AND VERIFIED ANSWERS 2025(GRADED A+)
DETAILED ANSWERS!!
Save
Terms in this set (322)
How many networks make 2 independent networks
up the electrical system Redundancy and fault isolation
on the airplane?
Why?
What happens if a power Bus ties automatically connect to provide no system
generating source fails? degradation
2 Integrated Drive Generators (IDG)
Auxiliary Power Unit (APU)
What components power
Inverter
the AC system?
Ram Air Turbine (RAT)
AC GPU receptacle
2 NiCad batteries
What components power
3 Transformer Rectifier Units (TRU)
the DC system?
DC GPU receptacle
How does the IDG A Constant Speed Drive (CSD) attaches the IDG to
maintain a stable power the AGB (Accessory Gear Box)
output?
What monitors and Each has a Generator Control Unit (GCU)
controls the IDG's?
https://quizlet.com/1064572888/mesa-airlines-e-jet-systems-exam-questions-and-verified-answers-2025graded-a-detailed-answers-flash-cards/?new 1/36
,08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
Can one IDG supply the Yes
entire electrical system?
What will cause the amber High oil temperature
IDG light on the overhead Low oil pressure
panel to illuminate?
If an IDG is manually No. This is a maintenance function
disconnected can it be
reconnected by the flight
crew?
What is the primary To power the AC BUSES and AC ESS BUS which...
purpose the AC Power the 3 Transformer Rectifier Units (TRU) 1, 2, and
generators? AC STBY BUS
What is the purpose of the To convert 115 VAC to 28 VDC
Transformer Rectifier
Units?
Can the APU replace a Yes
failed IDG?
Onside (IDG)
What is the AC electrical Inside (APU)
system's priority? Outside (GPU)
Cross-Side (Other IDG)
GPU button displays AVAIL and the GPU icon is
How is it known that an AC
presented on the electrical synoptic page
GPU is hooked up to the
Once the GPU button is pushed in, the button will
airplane and ready to
display IN USE provided another AC power source is
provide electricity?
not available.
What does it mean if the Ground service bus is in use
AC GPU is plugged in and Cockpit GPU button will display AVAIL even though
the outside GPU panel the ground service bus is in use
button displays IN USE?
https://quizlet.com/1064572888/mesa-airlines-e-jet-systems-exam-questions-and-verified-answers-2025graded-a-detailed-answers-flash-cards/?new 2/36
,08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
If the airplane is using the Deselect the GPU button before the next GPU
AC GPU and the APU is connection
started what should the
pilot be sure to do?
What will charge the Any AC Power Source
batteries?
How long will the aircraft's 10 minutes
batteries last with no
recharging?
What is the purpose of the For APU start when batteries < 22.0 VDC, or
DC GPU receptacle? If battery temp is < -20°C
What is the minimum -20°C
battery temp for APU
start?
What is the minimum 18 volts
battery voltage to close
the battery bus-ties?
What battery is used for BATT 2 powers the APU Start Bus
the APU start? BATT 1 powers the FADEC & EICAS for monitoring
Converts 28 VDC from the batteries to 115 VAC to
What is the purpose of the
power the AC STANDBY BUS when an AC source is
Inverter?
not available
What is on the AC Engine exciters 1A and 2A
STANDBY BUS?
What powers the Ram Air Airflow turns the RAT propeller which spins the
Turbine (RAT)? turbine inside
When will the RAT Automatically deploys if AC BUSES are not powered
deploy? Manually by pilot
How long after 8 seconds
deployment before the
RAT will supply power?
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, 08/08/2025, 11:33 Mesa Airlines E-JET Systems EXAM QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILED ANSWERS!! Flash…
Is there a total loss of No. Batteries supply power to the DC ESS BUSES and
power during the 8 AC STANDBY BUS
second RAT deployment?
What does the RAT ESS BUSES
power?
What is minimum airspeed 130 KIAS
for the RAT? Load shedding occurs below this speed
When is the RAT icon When the RAT is deployed
displayed on the electrical
synoptic page?
What manages the 4 Integrated Control Centers (ICC)
electrical system? 2 Secondary Power Distribution Assemblies (SPDA)
An electrical control device, which provides power
What is an ICC?
distribution and protection for electrical loads
An electrical load-management unit (powered by the
ICC's) that distributes electrical loads to aircraft
What is an SPDA?
systems according to distribution logic and performs
BITS on many components.
Can the flight crew reset ICC CB's can only be reset by maintenance
the ICC and SPDA remote SPDA CB's can be reset via the MCDU
electronic CBs?
How many fuel tanks does 2 integral tanks
the airplane have?
Where is fuel tank Left tank
temperature taken?
Primary ejector pump
What types of fuel pumps ACMP
are in each wing? DCMP (right tank)
3 scavenge ejector pumps
Venturi pump with no moving parts and no electrical
What is the Primary
power used by the respective engine
ejector pump?
Powered by motive flow
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