AQP UPS MD-11 Test Questions & Answers 2012/2013
What are the four different sources of electrical power available to the aircraft? - ANSWERS3 Integrated Drive Generators (IDG's),
APU Generator,
External Power,
Air Driven Generator (ADG)
How do the AC busses operate in parallel? - ANSWER...
What are the four different sources of electrical power available to the aircraft? - ANSWERS3 Integrated
Drive Generators (IDG's),
APU Generator,
External Power,
Air Driven Generator (ADG)
How do the AC busses operate in parallel? - ANSWERSAutomatically through the AC Tie Bus
How does the APU generator provide power to the AC system? - ANSWERSThrough its own independent
supply network, it can not be connected to the AC Tie Bus
The AC ground service bus allows ground servicing of the aircraft without energizing the whole electrical
system by ___? - ANSWERSUsing the APU Gen or Ext Pwr connected to the AC Ground Service Bus
What is the power source priority for the AC generator busses? - ANSWERS(1) Associated IDG,
(2) APU Generator
(3) The AC Tie Bus (External Power or another IDG)
What is the power source priority for the AC tie bus? - ANSWERS(1) External Power
(2) Any IDG
What is the normal power source for the DC busses? - ANSWERSNormally, 4 TR's provide DC power to
the DC Busses (includes the battery bus). The Battery and/or the ADG (through TR3) may be used as
emergency DC power source.
What is the normal power source for the DC bus 2 when isolated? - ANSWERSTR 2A
, What is the normal power source for the DC bus 3 when isolated? - ANSWERSTR 3
What is the normal power source for the battery bus? - ANSWERSDC Ground Service Bus via TR 2B
What provides power to the battery bus with the loss of normal AC power? - ANSWERSThe Battery
What components are tested when the EMER PWR selector is place to ARM during the preflight
emergency power test? - ANSWERSLeft Emergency AC and DC busses, Battery Charger, Static Inverter,
and ADG ciruits.
Once the emergency power system is armed, how is it activated? - ANSWERSWhen either the Left
Emergency AC or DC Busses are de-energized.
When the emergency power system is activated and the ADG is deployed in Hydraulic Mode,
approximately how many minutes of electrical power will the available? - ANSWERSApproximately 90
minutes
What equipment is powered when operating on emergency battery power only (no IDG, ADG, or APU)? -
ANSWERSDEU 1, DU 1 (PFD), DU 3 (EAD), IRU 1, CADC 1, MCDU 1, VOR 1, VHF 1, A ignition, Standby
flight Insturments, Stab Trim via the Longitudinal Trim Handles only.
When the emergency power system is activated what additional items are powered when the ADG is
deployed in Hydraulic Mode? - ANSWERSLeft Emergency AC Bus and Aux Hydraulic Pump 1
What should you do if emergency power is activated with normal AC power present? - ANSWERSThe
Emergency PWR selector switch must be cycled to "OFF" and then back to "ARM".
What is required for normal battery charging? - ANSWERSBattery switch "ON" (Emergency power not in
use),
Inverter-powered ground refueling is not taking place,
APU or Ext PWR on,
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