Answers - Electrical System | Aircraft Systems

Answers - Electrical System

FILL IN THE BLANKS

1. mathematical, electricity
2. semiconductors, transistors
3. generators, alternators
4. conductor movement/force, magnetic field current
5. inverter, HZ (cycle) AC
6. Inductive, capacitance, phase
7. Inversely, reduced, half
8. impedance, resistance
9. lead‐acid, ni‐cad, plates
10. essential, thirty
11. potassium hydroxide, discharge, manufacturer’s instructions
12. increases, greater, greater
13. generator control units (GCU), output
14. armature, field, electromagnetic, bus, loads
15. voltage/current, field
16. solid state, AC power, bus
17. alternator housing, integrated drive generator
18. bus power control unit, generator control unit
19. throttle, activated
20. flexing, stranded
21. mega‐ohmmeter, condition
22. derating, %
23. voltage drop, satisfactory
24. one, staggered
25. switches, close


MATCHING

1. 1‐c, 2‐d, 3‐b, 4‐d, 5‐a, 6‐b
2. 1‐a, 2‐b, 3‐b, 4‐c, 5‐a, 6‐c
3. 1‐c, 2‐d, 3‐c, 4‐b, 5‐a, 6‐d, 7‐c, 8‐a, 9‐b, 10‐d
4. 1‐c, 2‐a, 3‐b, 4‐d, 5‐b, 6‐a, 7‐c
5. 1‐e, 2‐c, 3‐a, 4‐f, 5‐d, 6‐b
6. 1‐f, 2‐c, 3‐a, 4‐d, 5‐b, 6‐e


KNOWLEDGE APPLICATION

1. 2.4A
2. 4 ohms
3. 24V
4. 24 x .707 = 17V
5. 112 x 1.41 = 158V
6. XL=2π (60) (.175) XL=66Ω
7.










10. T.P. = I2 x 6

11. Watts







13. A.P. = E x 1

14. Volt amps (VA)

15. T.P.= 52 x 5.6  T.P.= 140 Watts, A.P.= 50 x 5 A.P.= 250VA, PF= (140/250) X 100 PF=56%

16. in between 14 and 12, choose bigger size of 12.

17. size 20 wire

18. size 18 wire (in between 20 and 18)

19. 26.5A

20. 17.2A