11.6

Question 1

In a constant frequency AC system, reactive load sharing is achieved by regulating the

Answer 1

Voltage regulator

Question 2

In a constant frequency AC system, real load sharing is achieved by regulating the

Answer 2

Generator drive torque

Question 3

What happens if frequency decreases without alternating the physical length of the aerial?

Answer 3

The aerial becomes capacitively reactive

Question 4

What happens if frequency increases without alternating the physical length of aerial?

Answer 4

The aerial becomes inductively reactive

Question 5

DC shunt generator without a voltage regulator, if the load increases the generator output voltage will?

Answer 5

Decrease

Question 6

The output from an AC generator is taken from?

Answer 6

Connections on the stator

Question 7

Differential sensing coil senses?

Answer 7

Current

Question 8

What happens when you shut down the engine?

Answer 8

Under-frequency and under-volts

Question 9

The winding embedded in the pole face of a DC generator are?

Answer 9

Compensating windings

Question 10

How are Auxiliary windings wound on a DC generator?

Answer 10

Wound on top on the inter pole windings

Question 11

A vibrating contact voltage regulator has?

A. A resister in series with the points
B. A resister in parallel with the points
C. A volts coil in parallel with the points

Answer 11

B. A resister in parallel with the points

Question 12

A vibrating contact voltage regulator consists of a shunt winding and?

Answer 12

A voltage regulating coil in series

Question 13

A vibrating type voltage regulator regulates field current by?

Answer 13

A resistor in parallel with a pair of contact breaker points

Question 14

A voltage regulator installed in series with a generator field uses?

Answer 14

A voltage coil in parallel with the generator output

Question 15

AC generator output indications are measured in?

Answer 15

KW & KVAR

Question 16

An alkaline battery must have its electrolyte level adjusted when?

Answer 16

On completion of charge

Question 17

A SG check on a battery should be carried out when?

Answer 17

3 hours after flight

Question 18

Battery capacity is checked by?

Answer 18

Discharging at a constant current and checking the time taken to reach the discharged state

Question 19

Galley loads are supplied from where?

Answer 19

The main bus bar

Question 20

Increasing the real load primarily?

Answer 20

Decreases frequency

Question 21

Lead acid batteries when removed from service must be stored?

Answer 21

Fully charged

Question 22

Nickel cadmium batteries may be topped up with diluted or de-mineralised water when?

Answer 22

The battery is fully charged

Question 23

On a C.S driven generator, the operation of the disconnect solenoid will disconnect the generator drive, how is it reset?

Answer 23

Resetting can only be carried out on the ground

Question 24

On a split bus electrical system, during normal operation, the bus tie breakers are?

Answer 24

Always open in flight

Question 25

How is open phase sensing detected on a current transformer?

Answer 25

Detected on generator neutral circuit

Question 26

Over-voltage condition trips the generator. the time taken to trip the GCU depends on?

Answer 26

Amplitude of voltage

Question 27

Polarisation in a cell is?

Answer 27

The fact that hydrogen bubbles form on the -ve plate

Question 28

The current consumed by a DC starter motor will?

Answer 28

Decrease as the engine speed increases

Question 29

The electrolyte in a lead acid battery contains?

Answer 29

Sulphuric acid

Question 30

The electrolyte of a nickel-cadmium battery is the lowest when the battery is?

Answer 30

In a discharged condition

Question 31

The method used to rapidly charge a nickel-cadmium battery utilises?

Answer 31

Constant voltage and varying current

Question 32

The output from an AC generator is taken from?

Answer 32

Connections on the stator

Question 33

The preferred method of battery charging in a Ni-Cad battery is constant?

Answer 33

Current

Question 34

The purpose of a thermistor in a brushless AC generator is to?

Answer 34

Keep the exciter field resistance nearly constant at varying temperatures

Question 35

The SG of the electrolyte in a ni-cad battery on discharge?

Answer 35

Remains the same

Question 36

The small pins in the power connector plug are?

Answer 36

Positive

Question 37

The state of charge of a nickel cadmium battery. Can be accurately determined in a workshop by?

Answer 37

The time required to discharge

Question 38

To confirm the state of charge of a ni-cad battery?

Answer 38

Measure the discharge time

Question 39

To obtain DC from a generator, the armature windings are connected to?

Answer 39

A commutator

Question 40

To parallel an alternating current generator it’s one or more generators, phase A must be?

Answer 40

In phase with other generators and ABC

Question 41

To restore electrolyte after spillage?

Answer 41

Add a mixture of acid and water of same sg as that in the battery

Question 42

To restore the level of electrolyte which has been lost due to normal gassing during battery charging

Answer 42

Distilled water must be added

Question 43

Vibrating contact voltage regulator sensing coil is

Answer 43

in parallel with the field windings

Question 44

What would be the cause of a low electrolyte level in a in a nicad battery?

Answer 44

Over charging current

Question 45

When a ni-cad battery is fully charged?

Answer 45

The electrolyte level is higher level than normal

Question 46

When connecting aircraft batteries, the last lead to connect is the?

Answer 46

Negative

Question 47

Wires in hot temperature areas should be bound with?

Answer 47

Teflon

Question 48

Which generator has commutators?

Answer 48

DC

Question 49

Which generators have slip rings?

Answer 49

AC

Question 50

The trimmer resister in a carbon pile volts regulator is…..

Answer 50

In series with the generator volts coil

Question 51

The function of the voltage regulator in the GCU is to control the voltage at?

Answer 51

The point of regulation to 115v by influencing the exciter current

Question 52

When temperature of the electrolyte in a battery increases, the SG

Answer 52

Goes down

Question 53

When the temperature increases in a lead acid battery, the SG will?

Answer 53

Decrease

Question 54

Vibrating contact voltage regulator sensing coil is?

Answer 54

In parallel with the field windings