Basic electrcity

Question 1

What percentage of service calls are electrical?

Answer 1

85%

Question 2

Who sets the standard for electrical code?

Answer 2

National Electrical Code

Question 3

What is voltage?

Answer 3

The force that pushes current through wire.(Potential Energy)

Question 4

What is amperage?

Answer 4

Amount of current flowing through a wire. (Packages)

Question 5

What are Ohms?

Answer 5

Resistance to electrical flow.

Question 6

What is a Watt?

Answer 6

Power Consumed

Question 7

What are conductors?

Answer 7

Material that offers very little resistance to the flow of electricity.

Question 8

What are insulators?

Answer 8

Material that offers a lot of reinsurance to flow. Tightly bound electrons that create an outer valance.

Question 9

What is a load?

Answer 9

Converts electrical energy to some other form of energy to do work.

Question 10

Loads found on an oil burner?

Answer 10

Motors,electromagnetic coils,transformers,heaters.

Question 11

Parts of a circuit?

Answer 11

Source,switch, load,conductor

Question 12

What is a short circuit?

Answer 12

Running a conductor from the source without a load.

Question 13

What is Ohms law?

Answer 13

It takes one bolt to push one amp through one ohm.

Question 14

What is the Ohms law formela?

Answer 14

E

I R

Question 15

What is the power formela?

Answer 15

P

I E

Question 16

What is a series circuit?

Answer 16

There is only one path for electrical current through loads.

Question 17

What is a parallel circuit?

Answer 17

Has separate branches for each load. That way if one circuit goes out it won’t affect the others.

Question 18

What is D.C.?

Answer 18

Direct Current. Comes from battery’s. Only flows in one direction.

Question 19

What is AC?

Answer 19

Alternating Current. Made by generators. Travels both ways.

Question 20

What is BX?

Answer 20

Armored cable with no ground wire.

Question 21

What is MC?

Answer 21

Armored Cable with green insulated ground wire.

Question 22

What is greenfield?

Answer 22

Armored cable with no wires in it.

Question 23

What is a switch for?

Answer 23

To stop the flow of electricity.

Question 24

For a switch to safely control a load on a oilheat system it must be located in the ,never in the .

Answer 24

L1, Nuetral

Question 25

What is SPST?

Answer 25

Single Pole Single Throw.

Question 26

What is DPST?

Answer 26

Double Pole Single Throw. Can make or break two deprecate circuits agh the same time.

Question 27

What is a relay?

Answer 27

When a switch is sense to be normally open or normally closed.

Question 28

What is bimetal?

Answer 28

Two different strips of metal fused together. One end is secured the other under a electric heater. As it heats the two metals expand at different speeds.

Question 29

What is a solenoid?

Answer 29

A coil which creates a magnetic field.

Question 30

What measures voltage?

Answer 30

Voltmeter which measures the difference in electric pressure between two points.

Question 31

What does an ammeter measure?

Answer 31

Amps

Question 32

What should you know when measuring with you ammeter?

Answer 32

- Type of circuit - Design ampacity - Design current draw of the loads.

Question 33

Where can you find the design current draw of a load?

Answer 33

Eating Plate.tells you the design current draw in Amps for steady normal state operation.

Question 34

What is used to measure resistance?

Answer 34

Ohmmeter. Measures resistance between two points.

Question 35

How do you use an ohmmeter?

Answer 35

Shut of power due to ohmmeter has is own battery. Apply's a steady voltage from the meters battery to test resistance.

Question 36

What is continuity?

Answer 36

A measurement of a complete circuit.

Question 37

What are some common causes of overloads?

Answer 37

- To many devices on circuit - devices working to hard - damaged devices - surge when motor starts

Question 38

What are fuses?

Answer 38

One time safety devices. Protect against to much current.

Question 39

What's is electricity?

Answer 39

Movement of electrons from molecule to molecule of a conductive material.

Question 40

What are the parts of a circuit?

Answer 40

Source,switches,conductors,load

Question 41

How is wore sized?

Answer 41

(AWG) American Wire Gusge

Question 42

What size is thermostat wire?

Answer 42

18 Gauge | Good for 5 Amps

Question 43

Sizes of wire and amp rating?

Answer 43

``` 16/extension chords/10A 14/Romex/ 15A 12/Appliances/20A 10/pumps/30A 8/dryers/40A ```

Question 44

What are the styles of wire?

Answer 44

- solid - stranded - cable - Romex

Question 45

Different types of Romex?

Answer 45

- white 14 gauge - yellow 12 gauge - orange 10 gauge

Question 46

Styles of copper tubing?

Answer 46

Soft Drawn | Hard drawn

Question 47

Soft drawn tubing?

Answer 47

- Comes in 50/100FT Rolls | - Measured by outside diameter

Question 48

Hard drawn tubing?

Answer 48

- Comes in 10/20FT - measured by inside diameter - ACR measured outside diameter.

Question 49

Types of copper tubing?

Answer 49

M,L,K

Question 50

M copper tubing?

Answer 50

- Red - Thinnest - Non potable water, mechanical systems

Question 51

L copper tubing?

Answer 51

- Blue - Medium Thickness - Potable Water, AC/R

Question 52

K copper tubing?

Answer 52

- Green - Thickest wall - Direct bury,potable water,Gas

Question 53

What is soldering?

Answer 53

Process using heat and alloy to join copper together.

Question 54

At what temperature does soldering occur?

Answer 54

850 Degrees

Question 55

What is soft solder made of?

Answer 55

95 % Tin | 5 % Antimonium

Question 56

What does DVOM stand for?

Answer 56

Digital Volt Ohm Meter

Question 57

V- - - - | ______ ?

Answer 57

Volts DC ( Battery's)

Question 58

What is a capacitor?

Answer 58

Electrical storage device

Question 59

Types of capacitors?

Answer 59

Start & Run

Question 60

What is a start capacitor used for?

Answer 60

Start motors, stronger

Question 61

What is a run capacitor used for?

Answer 61

Gives extra ump

Question 62

What is a microfarad?

Answer 62

Electrical boost, how a capacitor is measured.

Question 63

How do you know if a capacitor is good?

Answer 63

If microfarads go up then down and reverse on it's own.

Question 64

How do you know if a capacitor is bad?

Answer 64

If it reads zero Ohms or overload.