SOC Electrical Flashcards

1
Q

What % of on the job fatalities are from electrocution?

A

5%

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

What materials are insulators from electrocution?

A

Glass, rubber, dry wood, clay, plastic

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

What materials are conductors of electricity?

A

metal, water, the earth, humans

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

What three factors resulted in the majority of electrical accidents?

A

unsafe work practices, unsafe equipment or installation and unsafe environment

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

What is “guarding”?

A

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

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

What is “grounding”?

A

creating a low resistance path that connects to the earth.

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

What are “circuit protection devices”?

A

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

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

Convert Watts to Volts

A

Voltage = Watts ÷ amps

E=P÷I

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

convert Watts to amps

A

AMPS = Watts ÷ Voltage

I=P÷E

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

convert amps to watts

A

Watts = voltage x amps

P=E x I

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

Convert horsepower to amps

A

HP = (B × A × EFF) ÷750

efficiency = (750xHP)÷(VxA)

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

What is the equivalent of horsepower to watts

A

1 HP= 750 watts

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

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

A

Main panel box

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

how many amps can a main panel box be?

A

100 150 or 200

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

What are 3 major safety rules?

A

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

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

What frequency is considered to be more dangerous?

A

low frequencies (60hz) because they suck you in

17
Q

What is a DC current?

A

direct current. (batteries)

18
Q

What is AC current?

A

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

19
Q

define hertz

A

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

20
Q

define Power

A

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

21
Q

define amps

A

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

22
Q

define watts

A

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

23
Q

define resistance

A

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

24
Q

what color is a bonding screw?

A

green

25
Q

what color are hot wires?

A

red or black, or another marked with tape

26
Q

what color are neutral wires?

A

white

27
Q

what are the box heights on a wall?

A
receptical 12" 
washer/dryer 36"
receptical on counter 42"
light switch 48"
special 66"
28
Q

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

A

12 Guage

29
Q

what amperage is an 8g wire used for?

A

50 amp

30
Q

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

A

traveler wire

31
Q

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

A

2 pole breaker