Gojet CRJ700 Electrics

Question 1

What does the AC ESS XFER switchlight do when selected

Answer 1

Transfers the AC Essential Bus to AC BUS 2

Question 2

How can the DC Service bus be powered?

Answer 2

From DC BUS 2 during normal DC operation, or from the APU BAT DIR BUS through use of the DC service switch.

Question 3

If ESS TRU 1 & 2 fail, how would the DC Essential Bus remain powered?

Answer 3

The automatic closure of the ESS TIE and the CROSS TIE will power both the DC BATT BUS and the DC ESS BUS in this situation

Question 4

What is the purpose of the ESS TRU 2 Tie Contactor?

Answer 4

After failure of both AC BUS 2 and ESS TRU 1, allows the AC ESS BUS to power ESS TRU 2. It will also do this if on ADG power and ESS TRU 1 fails.

Question 5

What does the ADG power?

Answer 5

ADG Bus, AC ESS BUS, slats, flaps, ACMP 3B pump and Stab Trim Channel 2

Question 6

What items are powered by the DC EMER BUS?

Answer 6

Engine and APU fire extinguishers and hydraulic and fuel shutoff valves.

Question 7

What are the Ampere/Hour and voltage ratings of the main and APU batteries?

Answer 7

Main 17 Amps/24 volts

APU 43 Amps/24 volts

Question 8

How many TRUs does the aircraft have and what are they rated at?

Answer 8

4 TRUs/120 amps

Question 9

What is the normal power source for the AC ESS BUS?

Answer 9

AC BUS 1.

Question 10

What is the priority of power source for each AC bus?

Answer 10

Onside generator–APU generator—opposite generator—external power

Question 11

What part of the IDG keeps the generator turning at a constant speed of 12,000 rpm?

Answer 11

Constant Speed Drive (CSD).

Question 12

What is the minimum airspeed required for proper operation of the ADG generator?

Answer 12

135 KIAS

Question 13

The ADG supplies power to ______________.

Answer 13

AC Essential bus, ADG bus and 3B hydraulic pump.

Question 14

What must you do to return the AC ESS BUS and ACMP 3B pump to normal aircraft power once the ADG deploys?

Answer 14

Insure ADG handle is stowed, then press the PWR XFER OVERRIDE button on the ADG control panel.

Question 15

What will happen to the AC ESS BUS and 3B pump after XFER Override when the aircraft generator power fails again?

Answer 15

They will revert back to being powered from the ADG

Question 16

What busses are powered with no AC power available and the Battery Master OFF?

Answer 16

Main Battery Direct, APU Battery Direct and EMER DC Bus

Question 17

What two conditions will result in an automatic l disconnect of the IDG?

Answer 17

Over temperature or Over torque

Question 18

What will cause the FAULT light to illuminate on the IDG DISC Switchlight?

Answer 18

High CSD oil temperature or Low oil pressure

Question 19

If the pilot presses the IDG DISC switchlight, the generator can be regained by releasing the switchlight

Answer 19

False.

Question 20

If the checklist calls for it, how many attempts can be made to reset a failed generator?

Answer 20

ONE attempt

Question 21

What DC bus is not normally displayed on the DC synoptic page?

Answer 21

DC EMER BUS

Question 22

What DC bus is not normally displayed on the DC synoptic page?

Answer 22

DC EMER BUS

Question 23

What should happen if one of the engine generators fails in flight?

Answer 23

The AUTO XFER relays should close to allow the remaining generator to power both AC systems.

Question 24

What does an illuminated FAIL light on the AUTO XFER switchlight indicate?

Answer 24

AUTO XFER was inhibited due to a fault on AC Bus 1 or 2.

Question 25

What does it indicate if the AC ESS ALTN switchlight is illuminated?

Answer 25

AC ESS BUS is being powered by AC Bus 2.