Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CPL AGK > Electrics > Flashcards

Electrics Flashcards

1
Q

Conductor

A

A material that has many free electrons and allows current to flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Insulator

A

A material that resists flow of current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Charge

A

A net surplus or deficiency of electrons in an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Static Electricity

A

An object which has gained electrons and cannot lose them has a static negative charge
If the object has a net deficiency of electrons it has a static positive charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Voltage

A

The force or pressure that allows electrons to flow

EMF

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Current

A

The rate of flow of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Resistance

A

Opposition to current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Ohm’s Law

A

Voltage = current x resistance
More voltage means more current flow
More resistance means less current flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Electric Power

A

The rate of work

Power = Voltage x Current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Circuits

A

A closed path through which current can flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Direct Current (DC)

A

Current flow in one direction

Produced by batteries or converted by a rectifier from AC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Alternating Current (AC)

A

Current whose flow reverses at regular intervals
Produced by alternators or converted by an inverter from DC
Measured by mean voltage or cycles per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Reverse Current Relay

A

Limits the minimum generator voltage, to protect the battery
Power source with greater voltage will drive the electrics
Takes the generator out of the circuit when its output falls below that of the battery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Sources of Electrical Power

A

The battery

The alternator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The Alternator

A

Generates electricity mechanically by spinning an electromagnet near a coil
Once the engine is started, the alternator charges the battery and powers electrical systems
Has a slightly higher voltage output to ensure the alternator powers the system instead of the battery
Produces AC
Usually 28 volt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The Battery

A 
Can store electricity
Rated according to voltage and capacity
Can supply power for a finite time
Contains electrolyte
Usually 24 volt
17
Q

Venting

A

Battery must be ventilated to prevent a build up of hydrogen and oxygen produced by the lead-acid batteries

18
Q

Voltage Regulator

A

Maintains the correct voltage output form the generator

19
Q

Overvoltage Relay

A

Prevents excess voltage from going to the bus bar in the case that the voltage regulator fails
It isolates the alternator and the battery supplies the power

20
Q

Bus Bar

A

A distribution point to which all the electrical services are attached

21
Q

Circuit Breakers and Fuses

A

Isolates each circuit if a surge of current threatens to damage it
Tolerate a number of amps before popping
Only reset once

22
Q

Battery Master Switch

A

Connects the battery to the electrical system and drives the circuit for the alternators magnetic field

23
Q

The Centre Zero Ammeter

A

Located in the battery circuit and indicates the current flowing to or from the battery
Should normally show a slight positive charge as the battery is charges
If the battery is discharging the needle is deflected to the minus side

24
Q

The Left Zero Ammeter

A

Located in the alternator circuit and indicates the output of the alternator
Normally deflected to the right
A zero indication signals an alternator failure

25
Q

External Power Receptacle

A

Provision for an external power source to be plugged in

Conserves battery power and is connected by a relay requiring a small current from the battery

26
Q

Gauge of the Wire

A

The thickness of the wire and is determined by the current

27
Q

Alternator Fault

A

Warning light will turn on
Recycle the switch, holding for 1-2 seconds, if it faults again turn the alternator switch off
Can supply all the electrics and will load shed non-essentials if necessary

28
Q

Capacitor

A

Stores electricity for a moment when a switch is turned off

Eg. the magnetos

29
Q

Transformer

A

Increase or reduce electricity (volts)

Step-up or step-down

CPL AGK (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions