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Worksheets

Block 10

Total questions: 59

Worksheet time: 30mins

Name
Class
Date
1.

The Generator works on the principles of ____

a)

Magnetic Induction

b)

Electromagnetic Force

c)

Energy Conversion

d)

Brushless Alternator

2.

What completes exciter field circuit for initial generator output

a)

AC Reset Circuit

b)

AC Field Circuit

c)

AC Generator Output Circuit

d)

AC Load Circuit

3.

When ____ is completed 120 VAC output begins

a)

AC Reset Circuit

b)

AC Field Circuit

c)

AC Generator Output Circuit

d)

AC Load Circuit

4.

What monitors engine speed under varying loads and makes fuel adjustments for constant rpm/output

a)

AC Reset Circuit

b)

AC Field Circuit

c)

AC Generator Output Circuit

d)

AC Load Circuit

5.

What monitors generator output and enables TR1

a)

AC Reset Circuit

b)

AC Field Circuit

c)

AC Generator Output Circuit

d)

AC Load Circuit

6.

What completes generator output through power cable to the load

a)

AC Reset Circuit

b)

AC Field Circuit

c)

AC Generator Output Circuit

d)

AC Load Circuit

7.

What provides voltage for battery charging and DC components

a)

DC Charging Circuit

b)

AC Field Circuit

c)

DC Load Circuit

d)

AC Load Circuit

8.

What provides DC output for equipment/aircraft requiring direct current

a)

DC Charging Circuit

b)

AC Field Circuit

c)

DC Load Circuit

d)

AC Load Circuit

9.

What are the 3 main parts of the brushless alternator?

a)

Permanent Magnet Generator, Exciter and Main Generator

b)

Excitation System, Diode Pack, and Cooling Fan

c)

Field Winding, Armature, and Rectifier Bridge

d)

Rotor Assembly, Stator Assembly, and Voltage Regulator

10.

What is the purpose of the permanent magnet generator?

a)

Provide AC voltage to the voltage regulator

b)

Provide DC voltage to the voltage regulator

c)

Supply power directly to the exciter field

d)

Maintain a constant magnetic field for generator operation

11.

When the exciter field establishes a magnetic field, AC voltage will be induced into _______

a)

AC Armature Windings

b)

DC Armature Windings

c)

Rotor Windings

d)

Stator Windings

12.

AC Voltage will be induced into ____ The output will be 120VAC on 3 Phases

a)

AC Armature Windings

b)

DC Armature Windings

c)

Rotor Windings

d)

Stator Windings

13.

_____ Receives input from MT1 to adjust spring tension in the governor to maintain 100%+- 1/4 of 1% rated engine speed

a)

Governor Trim Control Motor

b)

Hydraulic Actuator

c)

Speed Adjustment Servo

d)

Governor Control Unit

14.

What indicates 120 VAC Generator Output

a)

AC Voltmeter (M1)

b)

AC Frequency Meter (M2)

c)

AC Ammeter (M3)

d)

Tachometer (M6)

15.

What indicates Generator Frequency Output

a)

AC Voltmeter (M1)

b)

AC Frequency Meter (M2)

c)

AC Ammeter (M3)

d)

Tachometer (M6)

16.

What indicates the load placed on the generator

a)

AC Voltmeter (M1)

b)

AC Frequency Meter (M2)

c)

AC Ammeter (M3)

d)

Tachometer (M6)

17.

The ___ Prevents K3 from energizing when S3 is reset

a)

K22

b)

K4

c)

L1

d)

M4

18.

____ prevents battery discharge after unit shutdown

a)

Power Receptacle (J2)

b)

Battery Charging Diode (D1)

c)

AC Contactor Relay (K1)

d)

Battery Discharge Relay (K24)

19.

Under Voltage is?

a)

97+/- 5

b)

134+/- 4

c)

375+/- 5

d)

120VAC

20.

Over Voltage is?

a)

97+/- 5

b)

134+/- 4

c)

375+/- 5

d)

120VAC

21.

Under Frequency is?

a)

97+/- 5

b)

134+/- 4

c)

375+/- 5

d)

120VAC

22.

K11B energizes, closing the open N and P contacts, completing the ____

a)

AC Load Circuit

b)

AC Generator Output Circuit

c)

AC Field Circuit

d)

DC Load Circuit

23.

K11B closes the trip, C and D contacts and opens the ____

a)

AC Field Circuit

b)

Under frequency Relay

c)

AC Load Circuit

d)

Reset Contacts

24.

When the ____ circuit is complete the generator has output.

a)

AC Reset Circuit

b)

AC Field Circuit

c)

DC Load Circuit

d)

AC Generator Output Circuit

25.

The _____ connects generator output to the load.

a)

AC Contactor

b)

DC Contactor

c)

K4

d)

AC Reset Circuit

26.

Which meters indicate when the generator has output?

a)

M1 & M2

b)

M2 & M3

c)

M1 & M3

d)

M3 & M4

27.

____ prevents K3 from energizing when S3 is reset.

a)

K4

b)

K22

c)

K24

d)

K17

28.

The DC voltmeter indicates output voltage of ___

a)

TC1

b)

VR1

c)

TR1

d)

IGN

29.

What component parallels the DC ammeter allowing it to measure battery charging and DC load Current

a)

AC Contactor

b)

Ammeter Shunt (R4)

c)

Rheostat (R1)

d)

Voltage Regulator (VR1)

30.

____ prevents battery discharge after unit shutdown.

a)

D1

b)

K2

c)

R4

d)

S15

31.

___indicates when the DC contactor contacts close.

a)

DS1B

b)

DS1A

c)

DS1C

d)

DS3A

32.

Contacts between N & P are used to control ____

a)

AC Field Circuit

b)

AC Load Circuit

c)

DC Load Circuit

d)

AC Generator Output Circuit

33.

Contacts between C & D are used to control ____

a)

AC Field Circuit

b)

AC Load Contactor Circuit

c)

DC Load Contactor Circuit

d)

AC Generator Output Circuit

34.

In K11, B is used to?

a)

Reset Generator Output

b)

Prevent Generator output during starting

c)

Open k22

d)

Change AC to DC

35.

In K11, A is used to?

a)

Reset Generator Output

b)

Prevent Generator output during starting

c)

Open k22

d)

Change AC to DC

36.

K22 is used for what?

a)

Prevent overvoltage conditions during shutdown

b)

Enable proper sequencing of relays during generator shutdown

c)

Keep K3 & K25 from energizing during initial generator build-up

d)

Keep K3 & K25 from de-energizing during initial generator build-up

37.

What steps down and rectifies 3 phase AC potential to provide 28+/- .5 VDC for battery charging, DC components and DC loading through J2

a)

TR1

b)

S2A

c)

VR1

d)

TC1

38.

___ is a multi layered switch used to select what phase of power is indicated on the voltmeter, frequency meter and ammeter.

a)

TR1

b)

S2A

c)

S3

d)

S18

39.

___ energizes in any fault condition to stop generator output to the load

a)

K11A

b)

K11B

c)

CB1

d)

K24

40.

The ___ & ___ relays energize with normal output voltage and frequency

a)

K25 / K2

b)

K25 / K3

c)

K2 / K3

d)

K24 / K3

41.

The ___ & ___ relays de-energize with normal output voltage and frequency

a)

K25 / K2

b)

K25 / K3

c)

K2 / K3

d)

K24 / K3

42.

What protects the exciter field from excessive current flow

a)

K25

b)

K11A

c)

CB1

d)

TR1

43.

K25 Receives potential on ____ and constantly monitors generator output

a)

A, B, C Phase

b)

A Phase

c)

B Phase

d)

B and C Phase

44.

What happens to K25 if voltage drops to 97+-5 VAC

a)

De-Energizes

b)

Energizes

c)

Breaks

d)

Illuminates

45.

How does K2A function during a fault condition

a)

K2 closes when frequency drops below 375+-5Hz

b)

K2 closes when frequency drops below 134+-4

c)

K2 opens when frequency drops below 375+-5Hz

d)

K2 opens when frequency drops below 134+-4

46.

If frequency drops to ___ Hz or below, the K2A coil and its contacts return to the closed position

a)

375+-5

b)

97+-5

c)

60+-5

d)

134+-4

47.

Under Voltage for K25 is?

a)

375+-5

b)

97+-5

c)

60+-5

d)

134+-4

48.

K24 Energizes when the voltage across the exciter field reaches ____

a)

375+-5

b)

97+-5

c)

60+-5

d)

134+-4

49.

K24 Energizes when the voltage across the exciter field reaches ____

a)

375+-5

b)

97+-5

c)

60+-5

d)

134+-4

50.

Over Voltage for K3 is?

a)

375+-5

b)

97+-5

c)

60+-5

d)

134+-4

51.

N and P opens to ____

a)

Stop Generator Output

b)

Remove Load from Generator

c)

Stop Fault Systems

d)

To extend potential to SCR

52.

C and D opens to ____

a)

Stop Generator Output

b)

Remove Load from Generator

c)

Stop Fault Systems

d)

To extend potential to SCR

53.

C and K when opened De-Energizes ___

a)

K1

b)

K11

c)

K4

d)

VR1

54.

The ___ Relay protects the AC Field circuit from Excessive voltage caused by a short in the AC Load Circuit

a)

Under Voltage (24)

b)

Short Circuit (K24)

c)

Under frequency (K2)

d)

Over Voltage (K3)

55.

K24 energizes when voltage across the ___ Increases to 60+-5 VDC

a)

Short Circuit

b)

Generator

c)

Field Windings

d)

Voltage Regulator

56.

K24 has a ___ time delay to prevent it from energizing due to momentary surges of ___ in the exciter field

a)

1 Second, Current

b)

1 Second, Voltage

c)

5 Seconds, Voltage

d)

5 Seconds, Current

57.

CB1 Trips at ___

a)

9 AMPs

b)

2 - 5 AMPs

c)

1.7 AMPs

d)

28.5 AMPs

58.

What is the purpose of the suit case load bank?

a)

Test Ground Power Units by simulating an aircraft electrical load

b)

Diagnose and troubleshoot faults in electrical distribution systems

c)

Provide backup power to aircraft systems during maintenance operations

d)

Measure the efficiency of engine-driven generators under varying loads

59.

The suit case load bank uses ___ to apply resistive loads up to ___ KW

a)

Circuit Breakers / 75KW

b)

Resistors / 75KW

c)

Test Jacks / 120KW

d)

GPU / 120KW