Chapter 5 - Electrical Systems

Question 1

What are the maximum amps for the generators?

Answer 1

400 amps

Question 2

Ground power amps must be regulated between what limits?

Answer 2

500 to 1500 amps

Question 3

For a battery start, what is the minimum voltage required for a lead acid battery? For a NICAD battery?

Answer 3

24 volts; 23 volts

Question 4

Which bus voltage is displayed on the EPM readout?

Answer 4

Battery charging bus

Question 5

What is the electrical source of power for the emergency bus and how long does it operate if both generators fail?

Answer 5

Aircraft main batteries provide power for approx. one hour

Question 6

During total electrical failure, what is powered by the emergency batteries?

Answer 6

Standby attitude indicator, standby instrument lights, landing gear lights, ADC 1 and 2, and AHS 1 and 2 for 11 minutes

Question 7

If a generator fails in flight, what electrical loads are shed?

Answer 7

Cabin power bus, Freon cooling, baggage compartment heat, and cockpit floorboard heat

Question 8

What is the indication of failure of both 275-amp current limiters?

Answer 8

25 volts or less displayed on the EPM

Question 9

What items are hot wired to the battery buses?

Answer 9

Single-point refueling, entry lights, baggage lights, and aft compartment lights

Question 10

what is required to apply external power to the aircraft?

Answer 10

One battery must be turned on