1. The systems powered directly from the
battery bus with the airplane battery
switches in OFF are:
A. Fuel shutoff valves, door motor, and
entry lights
B. Shutoff valve (pinhead) lights, door
motor, left and right stall warning sys-
tems, and entry lights
C. Fuel and hydraulic shutoff valves,
shutoff valve (pinhead), door motor,
and entry lights
D. F i r e - e x t i n g u i s h i n g s y s t e m , d o o r
motor, entry lights, and shutoff valve
(pinhead) lights
2. It is possible to charge the batteries in the
airplane if:
A. A GPU is plugged in.
B. A GPU is plugged in with less than 33
±2 VDC on the small pin.
C. Both battery switches are on and a
GPU is plugged in with less than 33
±2 VDC on the small pin.
D. The battery switches are off and the
starter-generator switches are in GEN.
3. GPU output should be limited to a max-
imum of:
A. 600 amperes
B. 800 amperes
C. 1,000 amperes
D. 1,100 amperes
4. Each of the ammeters indicates the cur-
rent produced by its respective generator.
The DC voltmeter indicates:
A. Voltage on the battery bus
B. Voltage on the essential bus
C. Voltage on the main bus
D. Voltage on the battery charging bus
5. The maximum voltage (red line) value
on the DC voltmeter is:
A. 24 VDC
B. 28 VDC
C. 35 VDC
D. 33 ±2 VDC
6. The maximum (red line) amperage on the
ammeter is:
A. 400 amperes
B. 600 amperes
C. 800 amperes
D. 1,000 amperes
7. If a generator trips off the line, the cock-
pit indications are:
A. Battery voltage on the DC voltmeter
B. Zero amperes and an illuminated gen-
erator fail light
C. Both an illuminated generator and in-
verter fail light
D. An illuminated generator fail light
and indicated battery voltage
8. Minimum battery voltage for engine start
is:
Nicad
A. 16
C. 23
B. 24
D. 28
Lead Acid (up to 70°F)
A. 16
C. 24
B. 23
D. 28
9.
If both generators fail in flight, two fully
charged batteries supply power for:
A. Only DC equipment
B. Approximately 1 hour
C. Approximately 30 minutes
D. A short period of time
2-16
FOR TRAINING PURPOSES ONLY
LEARJET 20 SERIES PILOT TRAINING MANUAL
FlightSafety
international
QUESTIONS