Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
What is another name for EMF?
|
Voltage.
|
|
|
What are six ways EMF can be generated?
|
Friction,
Pressure, Heat, Light, Chemical, Magnetism |
|
|
What is the main advantage of electro-magnetism?
|
It can be switched on and off.
|
|
|
What is the most effective method of electricity generation?
|
Electro-magnetic induction.
|
|
|
What factors does the generator output depend on?
|
Speed of Rotation,
Strength of Magnetic Field, Number of Windings. |
|
|
What is the main disadvantage with generators?
|
They weigh alot more than alternators.
|
|
|
Does a practical generator produce AC or DC voltage?
|
DC
|
|
|
What is a commutator?
|
When a practical generator's slip rings are replaced with split rings to produce DC voltage. The split rings are known as a commutator.
|
|
|
Inducing Voltage (IDA) =
|
DC to AC
|
|
|
Rectifying Voltage (RAD) =
|
AC to DC
|
|
|
Can you start an alternator without a battery?
|
No, alternators unlike generators must be excited.
|
|
|
Are alternators fitted with rectifiers or inducers?
|
Rectifiers to convert AC to DC
|
|
|
What is a stator?
|
A stationary loop.
|
|
|
What is a rotor?
|
A Rotating Magnet.
|
|
|
What kind of diode is used for rectifying?
|
Silicone Diode
|
|
|
What is a reverse current relay?
|
A relay which allows current to flow in one direction only.
|
|
|
What does a '0' Centre Ammeter show?
|
Battery Condition,
Charge Rate, Discharge Rate. |
|
|
How long should you wait before resetting a circuit breaker?
|
2-3 minutes or until it is cool.
|
|
|
How many times can you reset a circuit breaker during a flight?
|
ONCE.
|
|
|
What are microswitches designed for?
|
Detecting small movements. Used on undercarriage and door locks.
|
