2a352h Volume 3 Ure
2a352h volume 3 ure
- 1.The constant speed drive (CSD) that is used to drive a 60/80 kilovolt-ampere (KVA) generator has an output of approximately
- A.
4,000 RPM.
- B.
6,000 RPM.
- C.
8,000 RPM.
- D.
10,000 RPM.
- 2.In an alternating current (ac) power supply system, the component that controls load division during parallel generator operation is the
- A.
Load controller
- B.
Under speed switch
- C.
Constant speed drive
- D.
Generator control unit
- 3.The under voltage trip point for the main generator in an alternating current (ac) power supply system is
- A.
93 [±3] VAC.
- B.
103 [±3] VAC
- C.
115 [±2] VAC
- D.
125 [±2] VAC
- 4.What circuit in the generator control unit (GCU) in an alternating current (ac) power supply system isolates shorted or open generator phase leads?
- A.
Reactive biasing
- B.
Voltage regulator
- C.
Neutral current-sensing
- D.
Unbalanced current-sensing
- 5.In an alternating current (ac) power supply system, what component connects the 115/200 volts alternating current (vac) main generator output to the main power buses?
- A.
Bus tie lockout (BTL).
- B.
Bus tie contactor (BTC).
- C.
Generator control unit (GCU).
- D.
Generator line contactor (GLC).
- 6.Before troubleshooting any system, be sure to read all
- A.
Cautions, notes, and disclosures
- B.
Procedures, warnings, and citations.
- C.
Warnings, cautions, and citations
- D.
Warnings, cautions, and notes
- 7.Which is not a step to follow when using the manual troubleshooting method?
- A.
Take meter readings
- B.
Limit the malfunction
- C.
Define the discrepancy
- D.
Swap the most probable cause.
- 8.In the direct current (dc) power supply system, the delta-wound secondaries of the internal transformer in the transformer rectifier (TR) unit are used to provide a more stable
- A.
Current input
- B.
Voltage input
- C.
Current output.
- D.
Voltage output.
- 9.During normal operation, the reverse current relays (RCR) in a direct current (dc) power supply system are energized by the
- A.
Battery
- B.
TR units
- C.
Battery bus
- D.
Emergency DC bus.
- 10.In the direct current (dc) power supply system, once all of the internal relays deenergize, the transformer rectifier (TR) units are disconnected from the buses
- A.
With the higher potential to them.
- B.
With the lower potential to them.
- C.
With an equal potential to them.
- D.
When power is removed
- 11.What is the minimum voltage required to energize the voltage relay inside a reverse current relays (RCR)?
- A.
21 vdc
- B.
22 vdc
- C.
26 vdc
- D.
28 vdc
- 12.When troubleshooting a direct current (dc) power problem, what step should be performed after you consult the aircraft forms and applicable technical data?
- A.
Replace the part called for first in the FI.
- B.
Perform an operational checkout
- C.
Ask the expeditor for more help.
- D.
Ask for an engine run
- 13.What should you do before taking any ohmmeter readings of a circuit?
- A.
Apply power to the circuit
- B.
Remove the circuit from power
- C.
Connect all connectors in the system
- D.
Verify the meter is set to the diode setting
- 14.Power from the F–22 alternating current (ac) inverters is distributed to
- A.
PDCs 1 and 2.
- B.
PDCs 3 and 4.
- C.
PDCs 5 and 6
- D.
PDCs 7 and 8.
- 15.When more than one source of power is available to the F–22, what priority is the auxiliary generator?
- A.
First priority.
- B.
Second priority.
- C.
Third priority.
- D.
Fourth priority.
- 16.How long does the F–22 auxiliary power unit (APU) switch need to be held to initiate APU operation?
- A.
1 to 2 seconds
- B.
2 to 3 seconds.
- C.
3 to 4 seconds
- D.
Less than 1 second
- 17.Which condition will cause the F–22 battery (BATT) LOW light to flash?
- A.
Battery is dead.
- B.
Battery power is available
- C.
Battery temperature is below –4°.
- D.
Power is available for only 1 APU start
- 18.To clear a flashing condition, battery heating may require up to
- A.
10 minutes
- B.
25 minutes
- C.
35 minutes
- D.
60 minutes
- 19.The 270 volts direct current (vdc) power for the F–22 ac inverters is received from
- A.
GDC 1 and 2
- B.
PDC 1 and 2
- C.
GDC 3 and 4
- D.
PDC 3 and 4
- 20.Which is a source of electrical power for the F–22 converter/regulators when permanent magnet generator (PMG) power is lost?
- A.
Auxiliary generator
- B.
Emergency generator
- C.
External dc power
- D.
Stored energy system
- 21.The fourth section of the F–22 permanent magnet generators (PMG) is used to power the
- A.
Main generator GCU
- B.
Stored energy system
- C.
Auxiliary GCU
- D.
Standby GCU
- 22.The F–22 aircraft battery is located behind
- A.
Panel 4121
- B.
Door 4135
- C.
Panel 4151.
- D.
Door 4234
- 23.What light indicates external electrical power is available to the F–22 aircraft?
- A.
AVAIL
- B.
EXT PWR
- C.
PWR AVAIL
- D.
PWR ON
- 24.The F–22 dc contactor K703 provides 270 volts direct current (vdc) from the external power receptacle to
- A.
GDC 1
- B.
GDC 2
- C.
GDC 3
- D.
GDC 4
- 25.Which component is not part of the F–22 emergency power generation system?
- A.
Auxiliary GCU
- B.
Auxiliary generator
- C.
DC contactor K704
- D.
Standby PMG
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