Electrical Flashcards Preview

737 > Electrical > Flashcards

Flashcards in Electrical Deck (19):
1

How is the electrical system managed when a fault occurs

The electrical system monitors itself for faults and automatically disconnects a Generator bus from its power source when electrical power is out of limits

2

What is the normal source of power for TRs1 and 2

Respective AC TRANSFER buses

3

What is the "backup" source of power for DC Bus 1

#2 TR
?(#3 tr)?

4

How does the TR3 disconnect relay normally function

Automatically opens during an A/P or F/D approach at glide slope capture

5

What is the power source for the Hot Battery Bus when all aircraft buses are powered(700)

Battery charger (?)

6

What is the normal source of power for the Battery Bus

TR3

7

What is the alternate source of power for the Hot Battery Bus when the normal power source is not available

Battery

8

What is the purpose of the CSD

Change variable engine speed into constant generator drive speed

9

Which of the following must be accomplished to check the battery condition

Turn on the battery switch, place DC meter selector to BAT, check volts within limits

10

Turning the Battery switch ON______

?
Provides the only means to power Standby Buses from the Battery

11

Which statement describes establishing power to the Ground Service Bus on the ground

GEN OFF BUS lights on, GRD service switch ON

12

What does an illuminated CSD HIGH OIL TEMP light indicate

CSD oil temperature exceeds operating limits

13

With a loss of all generators, a fully charged battery can supply power to the standby buses for at least

30 minutes

14

A ground service bus control switch, labeled "GROUND SERVICE" is located on the

Forward flight attendant panel

15

What is the minimum battery voltage for an APU start during the preflight

23 volts

16

When a CSD LOW OIL PRESSURE or HIGH OIL TEMP light comes on, the ________system annunciator and Master Caution lights illuminate

ELEC

17

When a 700 model IDG is operating and the IDG breaker is closed, the IDG output is connected to

Its respective Transfer Bus

18

What is the maximum single engine drive generator load for an 800 model aircraft on the ground

75kva-215 amps

19

The DRIVE light for an IDG illuminates when____(7,8,9)

A generator DRIVE malfunction occurs