SOC Electrical

Question 1

What % of on the job fatalities are from electrocution?

Answer 1

5%

Question 2

What materials are insulators from electrocution?

Answer 2

Glass, rubber, dry wood, clay, plastic

Question 3

What materials are conductors of electricity?

Answer 3

metal, water, the earth, humans

Question 4

What three factors resulted in the majority of electrical accidents?

Answer 4

unsafe work practices, unsafe equipment or installation and unsafe environment

Question 5

What is “guarding”?

Answer 5

enclosing electrical equipment so it won’t accidentally come into contact with live parts.

*Anything 50v or more must be accessible only to authorized personnel

Question 6

What is “grounding”?

Answer 6

creating a low resistance path that connects to the earth.

Question 7

What are “circuit protection devices”?

Answer 7

they limit or stop the flow of current automatically, in the event of a ground fault, overload, or short circuit in the system.

Question 8

Convert Watts to Volts

Answer 8

Voltage = Watts ÷ amps

E=P÷I

Question 9

convert Watts to amps

Answer 9

AMPS = Watts ÷ Voltage

I=P÷E

Question 10

convert amps to watts

Answer 10

Watts = voltage x amps

P=E x I

Question 11

Convert horsepower to amps

Answer 11

HP = (B × A × EFF) ÷750

efficiency = (750xHP)÷(VxA)

Question 12

What is the equivalent of horsepower to watts

Answer 12

1 HP= 750 watts

Question 13

What will all power go through before dispersion into the house?

Answer 13

Main panel box

Question 14

how many amps can a main panel box be?

Answer 14

100 150 or 200

Question 15

What are 3 major safety rules?

Answer 15

Insulate yourself to prevent shocks
work on one side of a circuit at a time
stay 10ft away from high tension wires

Question 16

What frequency is considered to be more dangerous?

Answer 16

low frequencies (60hz) because they suck you in

Question 17

What is a DC current?

Answer 17

direct current. (batteries)

Question 18

What is AC current?

Answer 18

alternating current. it’s generated through hydro, wind, generator etc

Question 19

define hertz

Answer 19

the number of times per second that a current will go plus to minus and back to plus per second

Question 20

define Power

Answer 20

at a plant electricity is charged (multiplied) and given voltage (“pressure”)

Question 21

define amps

Answer 21

current flow of electrons through wire. Delivered as either heat or light

Question 22

define watts

Answer 22

the rate energy is consumed at a point (toaster, light bulb etc)

Question 23

define resistance

Answer 23

how much current flows through a component, measured in ohms. (high resistance = lower flow)

Question 24

what color is a bonding screw?

Answer 24

green

Question 25

what color are hot wires?

Answer 25

red or black, or another marked with tape

Question 26

what color are neutral wires?

Answer 26

white

Question 27

what are the box heights on a wall?

Answer 27

receptical 12" 
washer/dryer 36"
receptical on counter 42"
light switch 48"
special 66"

Question 28

what size wire would you use for a 30 amp circuit?

Answer 28

12 Guage

Question 29

what amperage is an 8g wire used for?

Answer 29

50 amp

Question 30

in 12/2 Guage wire, what is the red wire used for?

Answer 30

traveler wire

Question 31

A 240v circuit will always have a how many pole breaker?

Answer 31

2 pole breaker