Mesa Airlines E175 Electrical question n answers graded A+

Mesa Airlines E175 Electrical What sources of AC power are on this aircraft? - correct answer - 2 IDGs (115VAC, 400Hz, 40kVA) - 1 APU Generator (115VAC, 400Hz, 40kVA) - 1 AC GPU (115VAC, 400Hz, 40kVA) - 1 RAT (115VAC, 400Hz, 15kVA) - 1 Inverter (250VA) Which sources of AC power are able to power both AC buses on their own? - correct answer 1 IDG, APU and AC GPU (ground only) What is the normal AC electrical priority? - correct answer Onside (IDG), Inside (APU), Outside (GPU), Cross-side (other IDG) What sources of DC power are on this aircraft? - correct answer 3 TRUs (28VDC, 300A), 2 NiCad Batteries (24VDC, 27AH), 1 DC GPU (28VDC) How is the electrical power distributed? - correct answer 4 line replaceable ICCs collect and confirm the power is safe and then sends it to the 2 SPDAs distribute it What items are on the HOT BATT BUS 1? - correct answer - Engine 1A/2A fire extinguisher - Engine 1 fuel shutoff valve - Hydraulics 1 shutoff valve - Engine 1 oil level indication - Courtesy/service lights - DC ceiling lights What items are on the HOT BATT BUS 2? - correct answer - Engine 1B/2B fire extinguisher - Engine 2 fuel shutoff valve - Hydraulic 2 shutoff valve - Engine 2 oil level indication - CMC - Panel refuel - Water and waste system How many networks make up the electrical system? Why? - correct answer 2 independent networks for redundancy and fault isolation What happens if a power generating source fails? - correct answer Bus ties automatically connect to provide no system degadation How does the IDG maintain a stable power output? - correct answer A CSD attaches the IDG to the AGB What monitors and controls the IDGs? - correct answer Each has a Generator Control Unit (GCU) What will cause the amber IDG light on the overhead panel to illuminate? - correct answer High oil temperature or low oil pressure If an IDG is manually disconnected can it be reconnected by the flight crew? - correct answer No What is the primary purpose of the AC generators? - correct answer To power the AC busses and AC ESS busses which power the 3 TRUs What is the purpose of the TRUs? - correct answer Convert 115VAC to 28VDC How is it known that an AC GPU is hooked up to the airplane and ready to provide electricity? - correct answer GPU button displays AVAIL and the GPU is on the electrical synoptic page. Once the GPU button is pushed in, the button will display IN USE, provided another AC power source is not available