Electrical

What is the typical battery voltage reading on the DC voltmeter when selecting the BAT position ?
1. 22 to 30 Volts.
2. 24 to 30 Volts.
3. 24 to 28 Volts.
4. 22 to 28 Volts.
The STBY PWR position on the AC meters selector will indicate: ?
1. frequency and voltage of the Standby Inverter.
2. zero because the standby bus is DC powered by the Transformer Rectifiers.
3. frequency and voltage of the AC Standby Bus.
4. voltage of the Standby Inverter.
Which position will show a volt and amperage reading on the DC voltmeter ?
1. BAT BUS
2. BAT
3. STBY PWR
What is the typical voltage reading when selecting the DC selector to any TR (Transformer / Rectifier) position ?
1. 24 to 30 Volts.
2. 22 to 30 Volts.
3. 28 Volts.
4. 26 to 28 Volts.
The TR UNIT warning light illuminated while airborne indicates: ?
1. a TR has failed.
2. TR1 has failed or TR2 and TR3 have failed.
3. any two TRs have failed.
4. all three TRs have failed.
The TR UNIT warning light illuminated while on the ground indicates: ?
1. any TR has failed.
2. TR1 has failed or TR2 and TR3 have failed.
3. any two TRs have failed.
4. all three TRs have failed.
Which air conditioning system will not operate unless the CAB / UTIL switch is ON ?
1. Recirc Fan System
2. Temperature Controls
3. Packs
The ELEC warning light illuminated indicates: ?
1. a fault in the AC power system or Standby System.
2. a fault in the DC power system or Standby System.
3. a fault in the AC or DC power system.
4. a fault in the AC and DC power system.
The ELEC warning light is inhibited while airborne.
1. True
2. False
Which unpowered bus or system would cause the STANDBY PWR OFF light to illuminate ?
1. The Battery Bus
2. The Switched Battery Bus.
3. TR 3
4. TR 1 and TR 2.
The DRIVE light will illuminate when which condition exists ?
1. IDG low oil pressure.
2. IDG voltage is above or below limits.
3. IDG frequency is above or below limits.
4. Manual IDG disconnect.
What is the NORMAL source of power for the AC Standby Bus ?
1. AC Transfer Bus 1.
2. AC Transfer Bus 2.
3. The Static Inverter.
4. Ground Service Bus 1.
What is the NORMAL source of power for the DC Standby Bus ?
1. The TRs.
2. The Battery Bus.
3. The Static Inverter.
4. The Hot Battery Bus.
What is the source of power for the AC Standby Bus if all AC power is lost ?
1. The Static Inverter.
2. The TRs.
3. The Battery Charger.
4. The DC Standby Bus.
What is the source of power for the DC Standby Bus if all AC power is lost ?
1. The TRs.
2. The Battery Bus
3. The Battery.
4. The Battery Charger.
How may power be removed from the AC and DC Standby Bus ?
1. Moving the BAT switch to OFF.
2. Moving the STANDBY POWER switch to OFF.
3. Moving the BAT and STANDBY POWER switches to OFF.
4. Moving the STANDBY POWER switch to BAT.
What is the NORMAL source of power for the Battery Bus ?
1. TR 3
2. TR 1 and 2
3. The Battery
Will the loss of a single AC Transfer Bus result in automatic switching to Standby Power ?
1. No, both AC Transfer Busses must be unpowered.
2. Only if AC Transfer Bus 1 is unpowered.
3. Only if AC Transfer Bus 2 is unpowered.
Will the loss of a single DC Bus result in automatic switching to Standby Power ?
1. No, both DC Busses must be unpowered.
2. Only if DC Bus 1 is unpowered.
3. Only if DC Bus 2 is unpowered.
Automatic switching to Standby Power will be available if the BAT switch is OFF.
1. True
2. False
Automatic switching to Standby Power is available on the ground.
1. True
2. False
What is indicated when the GRD POWER AVAILABLE light is illuminated ?
1. Ground power of the correct voltage and frequency is available.
2. Ground power of the correct voltage is available.
3. Ground power is available.
4. Ground power of the correct frequency is available.
When the Ground Power is switched to the ON position, which busses are powered ?
1. The AC Transfer Busses.
2. Only the Ground Service Busses.
If the APU is powering Transfer Bus 1 and IDG 2 is powering Transfer Bus 2 what will occur when switching to Ground Power ?
1. Ground Power will power both Transfer Busses and the APU and IDG will be disconnected..
2. Ground Power will power Transfer Bus 2 and the APU will power Transfer Bus 1.
3. Ground Power will power Transfer Bus 1 and the IDG will power Transfer Bus 2.
Will any available AC power source automatically power the Transfer Busses ?
1. No, manual selection of a power source is required.
2. Yes, if the Bus Transfer Switch is in AUTO.
If Ground Power is powering both Transfer Busses and IDG 2 is available and selected to ON, which statement is correct ?
1. Ground Power will power Transfer Bus 1 and IDG 2 will power Transfer Bus 2.
2. Ground Power will be automatically disconnected and IDG 2 will power both Transfer Busses.
3. Ground Power will be automatically disconnected and IDG 2 will power Transfer Bus 2. Transfer Bus 1 is unpowered.
4. Ground Power will continue to power both Transfer Busses until disconnected.
If Ground Power is powering both Transfer Busses and the APU is available and selected to power Transfer Bus 1, which statement is correct ?
1. Ground Power will power Transfer Bus 2 and the APU will power Transfer Bus 1.
2. Ground Power will be automatically disconnected and the APU will power both Transfer Busses.
3. Ground Power will be automatically disconnected and the APU will power Transfer Bus 1. Transfer Bus 2 is unpowered.
4. Ground Power will continue to power the Transfer Busses until the APU is selected to power both Transfer Busses.
Under what conditions will the DC Cross Bus Tie Relay automatically open ?
1. Upon glide slope capture during a flight director or autopilot ILS approach.
2. When the BUS TRANSFER switch is placed to OFF.
3. Failure of a single DC Bus.
If an IDG has failed, which of these warning lights will illuminate with the Bus Transfer switch in AUTO ?
1. SOURCE OFF
2. TRANSFER BUS OFF
3. SOURCE OFF and TRANSFER BUS OFF
If an IDG has failed, which of these warning lights will illuminate with the Bus Transfer switch in OFF ?
1. SOURCE OFF
2. TRANSFER BUS OFF
3. SOURCE OFF and TRANSFER BUS OFF
Maintaining uninterrupted power on both AC Transfer Busses is primarily the function of ?
1. the Bus Tie Breakers.
2. the Transfer Busses.
3. the IDGs.
4. the Ground Service Busses.
Automatic load shedding will occur if one IDG fails and the APU is subsequently used to power that bus.
1. False
2. True
Which bus(ses) will be automatically shed if the the APU is the only source of electrical power while airborne ?
1. All Galley and Main Busses.
2. The Galley Busses.
3. The Main Busses.
4. Transfer Bus 2.
If an IDG fails and the APU is not available to power that Transfer Bus, what will occur if an electrical overload exists ?
1. Automatic load shedding of the Galley and Main Busses on Transfer Bus 2.
2. Automatic load shedding of the Galley and Main Busses on Transfer Bus 1.
3. Automatic load shedding of the Galley and Main Busses on both Transfer Busses.
What is the AC power source for TR1 ?
1. Transfer Bus 1.
2. Transfer Bus 2.
3. Main Bus 1.
4. Main Bus 2.
What is the AC power source for TR2 ?
1. Transfer Bus 1.
2. Transfer Bus 2.
3. Main Bus 1.
4. Main Bus 2.
What is the AC power source for TR3 ?
1. Main Bus 1 backed up by Main Bus 2.
2. Transfer Bus 2 backed up by Transfer Bus 1.
3. Transfer Bus 1 backed up by Transfer Bus 2.
4. Main Bus 2 backed up by Main Bus 1.
What is the normal source of power for DC Bus 1 ?
1. TR1 and TR2.
2. TR1.
3. TR2.
4. TR1 and TR3.
What is the normal source of power for DC Bus 2 ?
1. TR1 and TR2.
2. TR1.
3. TR2.
4. TR1 and TR3.
What is the backup source of power for DC Bus 1 and DC Bus 2 ?
1. T3 backs up TR 1 and TR2 providing backup power for both DC Bus 1 and DC Bus 2.
2. The Battery.
3. The DC Standby Bus.
What is the normal surce of power for the Battery Bus ?
1. TR3.
2. The Battery.
3. The Hot Battery Bus.
4. The Switched Battery Bus.
What is the normal source of power for the DC Standby Bus ?
1. DC Bus 1 and DC Bus 2.
2. The Battery.
3. TR1, TR2 and TR3.
Under what condition(s) are DC Bus 1 and DC Bus 2 isolated ?
1. Switching the Bus Transfer switch to OFF.
2. Switching the Bus Transfer switch to OFF or glide slope capture during an ILS Flight Director/Autopilot approach.
3. At glide slope capture during an ILS Flight Director/Autopilot approach.
4. DC BUS 1 and DC Bus 2 are normally isolated.
What is the power source for the Battery Charger in a single battery installation ?
1. Ground Service Bus 2.
2. Ground Service Bus 1.
3. Transfer Bus 1.
4. Transfer Bus 2.

Electrical System