Electrical Power System

Question 1

External power receptacle is located

Answer 1

Right side of the fuselage at the wing trailing edge

Question 2

GEN 1

Answer 2

9kw, 300A

Question 3

GEN 2

Answer 3

6kw 200A

Question 4

Batteries

Answer 4

2 batteries, 20 cells, Nickel Cadmium, 25V, 24Ah

Question 5

How the batteries are connected

Answer 5

In parallel

Question 6

GEN 2 starts operating at

Answer 6

40% RPM

Question 7

GEN 2 erogates max power at

Answer 7

60% RPM

Question 8

5 busses

Answer 8

Essential bus
Primary bus
Secondary bus
Battery bus
Anti-ice bus

Question 9

With engine anti-ice system on, the anti-ice bus provides power to

Answer 9

The resistors in the ducts and lips

Question 10

In case of gens failure, or engine flame out, if the BATT SWITCH is moved to EMERG, batteries capability of supplying power for

Answer 10

46min (70% state of charge, daytime, 25ºC)
31min (70% state of charge, nighttime,
-18ºC)

Question 11

By moving BATT SWITCH to EMERG the only bus feeded from batteries is

Answer 11

Essential bus

Question 12

Data detected from temperature sensors are delivered to

Answer 12

EDAB for data processing and showing on MFDs

Question 13

BAT HOT

Answer 13

Temp 66ºC

Question 14

If BAT HOT light comes on the pilot should

Answer 14

Switch off the BATT SWITCH

Question 15

AC (Alternate Current) system

Answer 15

Single phase Static Inverter, 115V, 600A

Question 16

What are the systems alimented by inverter?

Answer 16

Power air-to-air missiles and AACMI pods

Question 17

Alternate current (AC) is used for

Answer 17

Power air-to-air missiles and AACMI pods (Static Inverter)
Feed the igniter plugs (AC Ignition Units convert power from 28VDC Essential Bus into alternating current)

Question 18

If we loose GEN1

Answer 18

Anti-ice bus
Secondary bus

Question 19

If we loose GEN2

Answer 19

Anti-ice bus

Question 20

If we loose GEN1/2

Answer 20

Anti-ice bus
Secondary bus

Question 21

If we loose BATT1/2

Answer 21

Battery bus

Question 22

If we loose gens or experiment an engine failure, batteries will supply power for how long? (NO EMG SWITCH)

Answer 22

21min daytime 70% state of charge 25ºC
14min nighttime 70% state of charge -18ºC

Question 23

If it comes on, when the BAT HOT turns off?

Answer 23

If temp goes below 60ºC

Question 24

External power provides

Answer 24

28VDC, 1200A

Question 25

GEN1 works as starter up to

Answer 25

23%RPM then polarities are inverted

Question 26

The GENs electrical load is monitored by

Answer 26

Relais Control Box

Question 27

The Relais Control Box

Answer 27

Disconnects generators in case of short circuit

Question 28

Power coming from generators is regulated by

Answer 28

Gen Control Unit (2)

Question 29

GEN1 delivers full power at

Answer 29

40% RPM

Question 30

Generator Control Units normally take power output difference within a value of

Answer 30

0.1 on loadmeters

Question 31

If generators are disconnected because of an overload condition, the Relais Control Box is reset by

Answer 31

Moving the GEN SWITCH to RESET

Question 32

The battery bus aliments mainly

Answer 32

Utilities used on the ground

Question 33

What MFDs are alimented by essential bus?

Answer 33

Center MFD
Right MFD

Question 34

Left MFD, HUD and DEP are alimented by which bus?

Answer 34

Primary bus

Question 35

External power provides energy to

Answer 35

All the buses except Anti-ice bus

Question 36

How many caution legend are associated to electrical system?

Answer 36

GEN1/2
BAT1/2
BAT HOT
CKT BRK

Question 37

When the inverter is energized?

Answer 37

Anytime DC power is available going through the primary bus

Question 38

Engine anti-ice takes power from which bus?

Answer 38

Primary bus

Question 39

Air intake anti-ice and ducts take power from which bus?

Answer 39

Secondary bus + anti-ice bus

Question 40

When you turn on the battery, which light on the glareshield comes on?

Answer 40

Anti Skid for 6-10sec