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Chapter 5-2

Electrical

QuestionAnswer
17. When would the amber IDG oil indicator light illuminate? a) HOTLOP - High oil temperature, Low oil pressure b) Annunciator test button
18. When the IDG 1 (2) OIL EICAS message displays, what should the pilot do? a) Disconnect the associated IDG per the QRH
19. If an IDG is mechanically disconnected, can the flight crew reconnect it on the ground or in flight? a) No
20. What is the primary purpose of the IDGs? a) Supply AC power during all operations
21. What is a TRU? a) Transformer Rectifier Unit
22. What is the purpose of the Transformer Rectifier Units? a) To convert AC to DC
23. TRU transforms AC to DC, is there a way to change DC to AC? a) Inverter
24. What is the purpose of the inverter? a) Converts DC to AC
25. Can the APU fully replace a failed IDG? a) Yes
26. Does the APU generator have the same rating as the IDGs? a) Yes
27. At the gate, ground power is connected. What does it mean when the GPU button says AVAIL a) Voltage / Amperage / Frequency are within limits
28. How is it known that an AC GPU is hooked up to the aircraft and ready to provide electricity? a) GPU button displays AVAIL and the GPU icon is presented on the electrical synoptic page
29. With AVAIL displayed on the GPU button, what happens when the GPU button is pushed in? a) The GPU button will display IN USE and connects the AC GPU to the AC BUS TIE according to system priority
30. If the aircraft is using the AC GPU and the APU is started, what should the pilot be sure to do? a) Deselect the AC GPU button so the power can be connected the next time it is used
31. What happens with the BATT 1 selector OFF? a) The battery supplies power to HOT BATT BUS 1
32. What will charge BATT 1 and BATT 2? a) Any AC power source
33. When is the HOT BATTERY BUS powered? a) The HOT BATTERY BUS is always powered
34. What items are on the HOT BATTERY BUSES? a) HOT BATT BUS 1: Engine Fire Extinguisher 1A & 2A, Fuel Shutoff Valve 1, Hydraulic Shutoff Valve 1, Engine 1 Oil Level Indication, Courtesy / Service Lights FWD, DC Ceiling Lights b) HOT BATT BUS 2: Engine Fire Extinguisher 1B & 2B, Fuel Shutoff Valve 2, Hydraulic Shutoff Valve 2, Engine 2 Oil Level Indication, Refueling Panel, Water & Waste System, CMC (Central Maintenance Computer )
Created by: lglippig
 

 



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