Electric Princables

Question 1

What does can bus stand for

Answer 1

Controller area network, data transfer

Question 2

What does iso bus stand for

Answer 2

International standard organisation

Question 3

Why are can wires twisted

Answer 3

To reduce interference

Question 4

What is the normal resistance down a can wire

Answer 4

60 ohms

Question 5

What does a zenor diode do

Answer 5

Guarantees a 5 v supply

Question 6

What causes electrons to flow

Answer 6

Potential difference

Question 7

What is multiplexing

Answer 7

A term for communication

Question 8

What is a cathode

Answer 8

A negative, angry cath

Question 9

Is a speed sensor passive inductive

Answer 9

Yes it is

Question 10

What is conventional electric flow

Answer 10

POS to neg

Question 11

What does a parallel circuit looks like

Answer 11

Item stack above one another

Question 12

What does dc mean

Answer 12

Direct current

Question 13

What does ac mean

Answer 13

Alternating current

Question 14

What is current

Answer 14

Rate of which electrons flow

Question 15

What is resistance

Answer 15

It is when a circuit has a form of resistance to flow

Question 16

What is electricity

Answer 16

It is the flow of electrons from atom to atom in a conductive material

Question 17

How many electrons on the outer shell does an insulator have

Answer 17

4 or more

Question 18

How many electrons are on the outer shell of a conductor

Answer 18

3 or less

Question 19

What is an atom made from

Answer 19

Neutron, proton and electron

Question 20

How many electrons does a semi conductor have on outer shell

Answer 20

Only 4 can be manipulated to be either

Question 21

What is true electron flow

Answer 21

Negative to positive

Question 22

What is potential difference

Answer 22

It is difference between voltage in 2 components or circuit

Question 23

What is a milivolt

Answer 23

0.001 volts

Question 24

What is current measured in

Answer 24

Amps

Question 25

What is emf

Answer 25

Electromagnetic force

Question 26

What is a consumer

Answer 26

It is any component within a circuit

Question 27

What are the rules of a series circuit

Answer 27

Resistance is equal to amount of resistors , and if one device stops working nothing works

Question 28

What are the rules of a parallel circuit

Answer 28

Resistance will equal smaller then smallest resistor

Question 29

What wave type does an inductive sensor give out

Answer 29

Sine wave it is a smooth up and down

Question 30

How do you check resistance of a component

Answer 30

Isolate the component then test using ohms function

Question 31

What effect happens when a wire is wrapped round a coil

Answer 31

It increases the magnetic field

Question 32

What is a relay and what is it used for

Answer 32

It is a switch which allows 2 serperate circuits to move current. Allows low current to switch to hugh current

Question 33

What are the 2 relay types

Answer 33

Single pole single throw (4 pin) And single pole double throw (5 pin)

Question 34

How to measure a parasitic drain

Answer 34

Remove negative removal and set multimeter to amps by moving it to the most left port on positive side. Connect in series ensuring no connection can happen on battery whatever amps are shown on the screen are the draw it has

Question 35

How does current work in a series circuit

Answer 35

It is the same at all points

Question 36

How does a voltage divider work in a series circuit

Answer 36

If there are 2 resistors r 1 and r 2 to work out r1 you would r1 over total resistance x input

Question 37

How do resistors in parallel work

Answer 37

Total will always be lower then smallest resistor, 1 over r total = 1 over r 1 + 1 over r 2

Question 38

What are the 3 ways of generating energy

Answer 38

Chemical , magnetism, solar

Question 39

What is a transistor

Answer 39

Is a micro relay

Question 40

How is a turbocharger driven

Answer 40

Through exhaust gasses

Question 41

How could you test an electronic fuel injector

Answer 41

Through a resistance check and a cylinder shutdown check

Question 42

How to test a common rail sensor

Answer 42

Check resistance through positive and signal and make sure it’s not high resistance or 0 ohms follow manufacturer guideline

Question 43

Why would a relay be fitted to a headlight circuit

Answer 43

To reduce current through the circuit

Question 44

In a 12v circuit 2 21 watt brake lamp bulbs are fitted how to work out smallest fuse needed

Answer 44

21 x 2 42 % 12 = 3.5 Need a fuse bigger than 3.5

Question 45

How to workout voltage through a resistor

Answer 45

Voltage out = voltage in % r2 over total resistance

Question 46

How to work out a voltage decider circuit

Answer 46

Resistance you want to work out divided by total x input voltage

Question 47

What is the normal resistance down a can wire

Answer 47

60 ohms

Question 48

What is a terminator resistance

Answer 48

120 ohms