Electrical Flashcards
The electrical system on this aircraft consists of a _____ V AC system and a _____ V DC system.
115, 28
Which of the following is not a part of the DC system?
Transformer Rectifier Units (TRUs),
2 22.8 V DC 27A NiCad batteries,
a DC external power unit
- NOT APU GENERATOR, ENGINE DRIVEN IDG, OR INVERTER - -
Which of the following is not a part of the AC system?
2 Engine Driven Integrated Drive Generators (IDGs),
an APU generator,
an INVERTER,
a Ram Air Turbine (RAT),
and AC external power unit
- NOT BATTERIES, TRU’s, OR DC EXTERNAL POWER RECEPTACLE - -
True or False: Four (4) Integrated Control Centers and two (2) Secondary Power Distribution Assemblies provide control and power distribution of electrical power.
True
True or False: The output of the APU-driven generator is more power than output by the IDGs.
False
True or False: The APU-driven generator can be used on the ground and in flight.
True
True or False: Once the APU is started and the generator comes on line, external power must be manually deselected before the APU generator can power all AC buses.
False
[happens automatically]
True or False: When the APU generator and AC external power is available, both will supply power to the aircraft at the same time.
False
True or False: When the aircraft is parked, AC external power can supply power to the entire electrical system.
True
After AC power has been restored following a total AC power loss in flight, when will the RAT retract?
It cannot be stowed in flight, even if normal electrical power is re-established. (5.12 Vol 2)
How long does the RAT take to provide power to the AC and DC ESS BUSES after it has been deployed?
8 sec.
True or False: In the event of a total loss of AC power, the Ram Air Turbine must be manually deployed.
False [it’s automatic]
If automatic deployment fails, then it can be manually deployed.
If the aircraft slows to a speed below _______ kts., the RAT may only supply
power to the AC ESS BUS and the batteries power the DC ESS BUSES and
STANDBY AC BUS.
130 kts
Inflight, what is the altitude restriction for RAT deployment?
In flight, there is no altitude restriction for RAT deployment.
The static inverter converts _______ power to _______ power.
28 V DC (battery power from DC ESS BUSS 1),
115 V AC (AC STANDBY BUS - “A” IGNITERS)
Which TRU normally provides power to the DC Ground Service Bus?
TRU 1
What does TRU ESS provide power to?
DC ESS BUS 3
Which of the following is displayed on the Electrical synoptic when a TRU has failed?
An amber X
During an electrical emergency, when the RAT is not fully deployed or the stall speed is reached, the batteries are capable of supplying essential electrical loads for _______ minutes.
10 min.
True or False: The aircraft is equipped with two SPDAs, located in the forward and aft EBAYS.
FALSE
[Forward and Center EBAYS]
The aircraft is equipped with which of the following types of circuit breakers?
Thermal and electronic
Which classification of circuit breakers are found in the flight deck?
Thermal only
True or False: The SPDA’s contain electronic circuit breakers that are accessible from the MCDU.
True
Sources of AC power include _______.
2 IDGs (Integrated Drive Generators),
APU Generator,
RAT (Ram Air Turbine),
and AC external power unit
(Also Inverter)
True or False: Once disconnected, whether manually or automatically, an IDG
cannot be reconnected in flight.
True
The APU generator can perform which of the following?
Can power the entire electrical system by itself
True or False: In the event of a loss of AC power, the Ram Air Turbine (RAT) must be manually deployed using the RAT MANUAL DEPLOY handle.
False
Under normal operating conditions, DC power is provided by _______ Transformer Rectifier Units and _______ batteries.
3, 2
True or False: TRU ESS provides AC power to DC ESS BUS 3.
False
True or False: BATT 2 will also power the APU START BUS if needed.
True
System logic provides electrical power for the aircraft according to which of the following source priorities?
RAGO:
Respective IDG (onside)
APU (Inside)
GPU (Outside)
Opposite IDG (offside)
Which of the following is NOT on the AC Essential Bus?
AC fuel pump 2A
ACMP 3A (hydraulic system pump) =pitch, roll, yaw
SF-ACE 1 Flaps
SF-ACE 2 Slats
(5.32 Vol 2)
- NOT ALTERNATE LANDING GEAR EXTENSION MOTOR - -
Which of the following is not a part of the DC system?
Transformer Rectifier Units (TRUs),
2 22.8 V DC 27A NiCad batteries,
a DC external power unit
- NOT APU GENERATOR, ENGINE DRIVEN IDG, OR INVERTER - -
Which of the following is not a part of the DC system?
Transformer Rectifier Units (TRUs),
2 22.8 V DC 27A NiCad batteries,
a DC external power unit
- NOT APU GENERATOR, ENGINE DRIVEN IDG, OR INVERTER - -
Which of the following is not a part of the AC system?
2 Engine Driven Integrated Drive Generators (IDGs),
an APU generator,
an inverter,
a Ram Air Turbine (RAT),
and AC external power unit
- NOT BATTERIES, TRU’s, OR DC EXTERNAL POWER RECEPTACLE - -
Which of the following is not a part of the AC system?
2 Engine Driven Integrated Drive Generators (IDGs),
an APU generator,
an inverter,
a Ram Air Turbine (RAT),
and AC external power unit
- NOT BATTERIES, TRU’s, OR DC EXTERNAL POWER RECEPTACLE - -
