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The B787 Electrical System: a. Uses 2 Variable Frecuency Starter Generators (VFSG) - 235VAC on each engine and 2 APU Starter Generators (ASG)- 235 VAC. b. Uses 1 Variable Frecuency Starter Generators (VFSG) - 235VAC on each engine and 1 APU Starter Generators (ASG)- 235 VAC. c. Uses 2 Variable Frequency Starter Generators (VFSG) - 115VAC driven by each engine and 2 APU Starter Generators (ASG)- 115 VAC.

The B787 electrical system: a. Uses 200 VAC, 270 VDC, 115 VAC and 28VDC. b. Uses 235 VAC, 270 VAC, 115 VAC and 28VDC. c. Uses 235 VAC, 270 VDC, 115 VAC and 28VDC.

How many External Powers can be connected on the B787?. a. One. b. Two. c. Three.

You can access to Circuit Breaker Indication and Control (CBIC) to operate the Electronic Circuit Breakers (ECB) and check the status of Thermal Circuit Breakers (TCB) using: a. Multi-Function Displays (MFD) and Maintenance Laptop. b. Only Maintenance Laptop. c. Only MFD in the cockpit.

Which of these can supply power to the airplane?.  Ram air turbine generator.  Variable frequency starter generators (VFSG).  Auxiliary starter generators (ASG).  Power panels.  External power receptacles.  Main and APU batteries.

Match the electrical system power panels with their functions. Contain the L1, L2, R1 and R2 main 235v ac buses  P300/P400  P100/P200  P700/P800  P500/P600. Contain the L115v ac and R115v ac buses  P300/P400  P100/P200  P700/P800  P500/P600. Contain the autotransformer units (ATU), transformer rectifier units (TRU), and electric brake power supply units (EBPSU)  P300/P400  P100/P200  P700/P800  P500/P600. Contain the L1, L2, R1, and R2 ±270v dc buses  P300/P400  P100/P200  P700/P800  P500/P600.

What components change 235v ac or 115v ac to +/- 270v dc and send it to the common motor start controllers?. atrus. atu. gatu.

Some CMSCs control more than 1 motor. What controls the contactors in the P700 and P800 that let the CMSC connect to the correct motor?. CMSC. CCR. CMCF.

The autotransformer rectifier units (ATRU) get liquid cooling from:  the power electronics cooling system (PECS).  the integrated cooling system (ICS).

Each of the variable frequency starter generators has an independent oil cooling system.  True.  False.

The variable frequency starter generator (VFSG) drive can be manually or thermally disconnected.  True.  False.

You can use CBIC to see and control thermal circuit breakers.  True.  False.