Electrical

Question 1

Electrical deaths per year (civilian & fire)

Answer 1

700 civilian
25 fire

Question 2

of electrical calls per year

Answer 2

3000

Question 3

Amps

Answer 3

Current flow

Question 4

Volts

Answer 4

Pressure behind current flow

Question 5

Kilovolts

Answer 5

1000 volts

Question 6

Ohms

Answer 6

Resistance to electrical current

Question 7

Ohms law

Answer 7

Watts = amps x volts
Amps = watts / volts
Volts = watts / amps

Question 8

Watts

Answer 8

Amount of current times voltage

Question 9

Voltage ratings

Answer 9

Extremely high voltage = > 60,000
High voltage = 600 - 59,900
Low voltage = < 600

Question 10

Electricity compared to fire hydraulics

Answer 10

Conductor = Hose
Current = Water
Voltage = Pressure
Amperes = Gallon per minute
Ohms = Friction

Question 11

Generation plant volt generation

Answer 11

4000 - 20,000

Question 12

General transmission line voltage

Answer 12

69 kv - 1,000kv

Question 13

LA Transmission line voltage

Answer 13

230kv

Question 14

Insulator length ranges

Answer 14

3 - 20ft

Question 15

of LADWP receiving stations

Answer 15

21

Question 16

Receiving station voltage

Answer 16

Received = 138kv - 500kv
Stepped down to 34.5kv

Question 17

Distribution station voltage

Answer 17

Received at 34.5kv and stepped down to 4.8kv

Question 18

Primary lines voltage

Answer 18

4.8kv

Question 19

Overhead transformer voltage

Answer 19

Received = 4.8kv
Stepped down to 120 - 240 volts

Question 20

Conductor

Answer 20

Materials that allow electrical current to flow easily (metals and human beings)

Question 21

Insulator

Answer 21

Prevent the flow of electricity (glass or porcelain)

Question 22

How to determine high voltage

Answer 22

1) signs
2) size and shape of insulators
3) distance between conductors

Question 23

Types of electrical injuries

Answer 23

1) electrocution
2) electrical shock
3) burns
4) falls

Question 24

Amount of amps that can paralyze or freeze muscles

Answer 24

10 milliamps

Question 25

Most significant factor in resuscitation of electrical shock victims

Answer 25

Early defibrillation (for every min defibrillation is delayed, survival chances drop 10%

Question 26

Danger from electrical shock depends on

Answer 26

1) Amount of current 2) duration of shock 3) path of shock through body

Question 27

Voltage gradient

Answer 27

Decreasing current when energized wire is in contact with ground (ripples)

Question 28

Touch potential

Answer 28

Contacting live or energized source

Question 29

Step potential

Answer 29

When victims create a circuit with their feet as they walk across voltage gradient

Question 30

Arial odder opperation

Answer 30

For high voltage (> 600 volts) operate min of 10 feet away

Question 31

Communication line voltages

Answer 31

50 volts

Question 32

30/33/100 rule

Answer 32

1) 30 % fog patters 2) 33 feet away 3) 100psi

Question 33

When to have victims exit a charged vehicle

Answer 33

only when life threatening emergency exists

Question 34

When do direct hose stream at high voltage lines

Answer 34

NEVER