TB 8: Electrical Hazards

Question 1

What are the principles of electricity?

Answer 1

Basic form of energy and static or moving current

Question 2

Amps = (compared to water)

Answer 2

GPM

Question 3

Volts = (compared to water)

Answer 3

Pressure

Question 4

1 kilovolt is equivalent to how many volts?

Answer 4

1000 volts

Question 5

Ohms= ( compared to water)

Answer 5

Resistance, friction loss

Question 6

Watts=

Answer 6

Amps x volts

Question 7

Low voltage is how many volts?

Answer 7

599 and below

Question 8

High voltage is how many volts?

Answer 8

600 to 59,999 volts

Question 9

How many volts is extremely high voltage?

Answer 9

60,000 and up

Question 10

Generating systems generate between ________ to ________ volts

Answer 10

4000 to 20,000

Question 11

Relay switch stations do what to the volts

Answer 11

Raise the voltage

Question 12

How many kilovolts do the transmission lines transfer energy?

Answer 12

69k to 1000kv

Question 13

How many kilovolts do the transmission lines transfer in at to LA?

Answer 13

230kv

Question 14

At how many kilovolts is the line then considered a transmission line?

Answer 14

69kv

Question 15

How many feet are insulators on electrical lines?

Answer 15

3-20 feet

Question 16

The electrical distribution system steps down the voltage how many times before being delivered to consumers?

Answer 16

3x’s

Question 17

What are the 4 types of injuries from from electrical shock?

Answer 17

Electrocution
Shock
Burns
Falls

Question 18

DWP primary distribution lines are usually ____kv?

Answer 18

4.8

Question 19

Cross arms carry voltage sings that states _____.

Answer 19

High voltage 750 volts

Question 20

When directing hose streams on a power pole, what is the 30/33/100 indicate?

Answer 20

30 degrees stream
33 feet
100 psi

Question 21

What voltage are street lights powered to?

Answer 21

120 to 6150

Question 22

What are the 2 main components of the electrical transportation system. ____ and _____

Answer 22

Grids and transmission lines

Question 23

When spotting apparatus around affected power poles, spot at least the stance of

Answer 23

2 power poles ( 1 span)

Question 24

_____ amp of electricity going through the body for just 2 seconds is enough to cause death

Answer 24

1/10

Question 25

_____ milliamps or a nice can cause paralysis

Answer 25

10

Question 26

_____ milliamps can cause v- fib

Answer 26

75

Question 27

Respiratory failure can occur with voltage as low as _______ volts to _______ milliamps

Answer 27

49, 30

Question 28

Communication lines can be energized up to how many volts?

Answer 28

50 volts

Question 29

How many feet shall ladders be away from power lines that are 600 volts and higher?

Answer 29

10 feet

Question 30

What is the minimum amount of horizontal strands of fire line tape that shall be deployed?

Answer 30

3

Question 31

Man hole covers can be thrown how far?

Answer 31

300lbs, 75 feet vertically, 125 feet horizontally

Question 32

How far in wild land fires how far shall you be away from transmission tower ?

Answer 32

35 feet

Question 33

What is the minimum distance you shall be to outermost transmission lines?

Answer 33

100 feet

Question 34

Never spray hose stream within ____of high-voltage lines in heavy smoke

Answer 34

100 feet

Question 35

Cooling oil in vaults have flashpoint below ______degrees

Answer 35

300

Question 36

High voltage cables in vaults up to _______Volts?

Answer 36

230,000

Question 37

Conduit psi of oil pressure is_____?

Answer 37

200