Volume 10: Chapter 3, Section 6

Question 1

Electrical accidents account for _______ deaths per year

Answer 1

700

Question 2

Electrocutions account for _______ fire fighter deaths per year

Answer 2

25

Question 3

Low Voltage current ranges from _____ to _____ volts

Answer 3

• 110

* 480

Question 4

Residential low voltage currents are delivered between ______ and ______ volts

Answer 4

• 110

* 240

Question 5

Commercial low voltage currents are delivered between ______ and _____ volts

Answer 5

• 240

* 440

Question 6

High Voltage current ranges above _____ volts

Answer 6

600

Question 7

______ transmission lines will NOT be cut by Department personnel

Answer 7

High voltage (600 volts)

Question 8

CAL OSHA requires aerial ladders to operate with _____ clearance of transmission lines

Answer 8

10 ft

Question 9

When placing ground ladders, a minimum of ______ must be maintained from electric lines

Answer 9

10 ft

Question 10

For downed power lines, a minimum distance of _______ should be the security perimeter

Answer 10

30 ft

Question 11

The only personnel who can determine if a electrical line is de-energized is_______

Answer 11

Power utility personnel

Question 12

_______ are located on power poles below electric transmission lines

Answer 12

communication cables

Question 13

High voltage lines are located on (3)_______

Answer 13

• electric towers
• concrete poles
• occasionally wood poles

Question 14

Voltage thru transmission and sub transmission lines ranges from _____ to _____

Answer 14

55kV to 550 kV

Question 15

Distribution lines on power poles are in excess of ______

Answer 15

33 kV

Question 16

Once elevated supply cables are de-energized, there is residual power of _______

Answer 16

20kV

Question 17

When moving a line the rescuer should _______ the line

Answer 17

pull

Question 18

When extinguishing a fire from a car into a power pole, use ______

Answer 18

Class C extinguisher

Question 19

If the fire is near the top of power poles, consider it a _______ fire

Answer 19

Class C

Question 20

For fires in vaults or under manhole covers, FF should _______

Answer 20

Make no attempt to extinguish until de-energized

Question 21

For fires in vaults or under manhole covers the safety perimeter is____

Answer 21

150 ft

Question 22

The approved method for de-energizing occupancies is by ______ or switching off circuit breakers

Answer 22

opening

Question 23

When switching off circuit breakers you _____ the breakers

Answer 23

Open

Question 24

When switching off circuit breakers do them ______ and then open the ______

Answer 24

• individually

* master

Question 25

When opening breakers at an electrical main, _________ breakers that were already open

Answer 25

Mark

Question 26

Never de-energize a structure by ________

Answer 26

pulling the electrical meter

Question 27

_________ cut tri-plex or quad-plex cables

Answer 27

Do not cut

Question 28

On a wildland fire, the safe distance to maintain is ______

Answer 28

1 ½ pole height

Question 29

NFPA states that it is safe for a FF to maintain a minimum of ______between the fog nozzle and power lines rated at up to 10,000 V.

Answer 29

4 ft

Question 30

NFPA states that it is safe for a FF to maintain a minimum of 4 ft between the fog nozzle and power lines rated at up to ________

Answer 30

10,000 V

Question 31

Fires in electrical sub-stations are considered Class ____ fires

Answer 31

C until de-energized

Question 32

Fires in transformers that have been de-energized are considered Class ___ fires

Answer 32

B

Question 33

Only ________ can de-energize head end power on a Metrolink

Answer 33

Metrolink crew

Question 34

Electric service to Metrolink Blue Line is supplied via a ______V current to the head end power unit

Answer 34

480V

Question 35

Personnel should never ________ the walls of a Metrolink

Answer 35

Breach or cut

Question 36

Walls of a metrolink are _______

Answer 36

double lined

Question 37

A 480v line is routed thru _______ of a metro link

Answer 37

The walls

Question 38

Metro transit light rail are powered by ______ volts

Answer 38

750 by the OCS (Overhead Catenary System)

Question 39

Traction power sub stations are located at _______ intervals

Answer 39

1 mile

Question 40

Each TPSS can be identified by a ______

Answer 40

blue light

Question 41

The overhead catenary system (OCS) has (4) parts

Answer 41

• Messenger wire
• Hangar
• Contact Wire
• Catenary pole

Question 42

On hybrid vehicles, high voltage lines are colored ________

Answer 42

Orange