TB # 8 ELECTRICAL HAZARDS

Question 1

A COMPARISON OF ELECTRICITY AND THE EQUIVALENT IN FIREGROUND HYDRAULIC TERMS:
AMPERES = ________

Answer 1

GALLONS PER MINUTE

Question 2

A COMPARISON OF ELECTRICITY AND THE EQUIVALENT IN FIREGROUND HYDRAULIC TERMS:
VOLTS = _______

Answer 2

POUNDS PER SQUARE INCH (PSI)

Question 3

A COMPARISON OF ELECTRICITY AND THE EQUIVALENT IN FIREGROUND HYDRAULIC TERMS:
OHMS = ______

Answer 3

FRICTION LOSS

Question 4

A COMPARISON OF ELECTRICITY AND THE EQUIVALENT IN FIREGROUND HYDRAULIC TERMS:
CURRENT = _______

Answer 4

WATER

Question 5

A COMPARISON OF ELECTRICITY AND THE EQUIVALENT IN FIREGROUND HYDRAULIC TERMS:
CONDUCTOR = _______

Answer 5

HOSE

Question 6

LOW VOLTAGE

Answer 6

USUALLY BELOW 600 VOLTS

Question 7

HIGH VOLTAGE

Answer 7

600 VOLTS UP TO 59,999 VOLTS

Question 8

EXTREMELY HIGH VOLTAGE

Answer 8

EXCESS OF 60,000 VOLTS

Question 9

GETTING ELECTRICITY TO THE CONSUMER CAN BE BROKEN DOWN INTO 3 SYSTEMS:

Answer 9

GENERATION, TRANSMISSION & DISTRIBUTION

Question 10

LADWP SYSTEM IS COMPRISED OF OVER __,____ TRANSFORMERS, OVER ___,____ POLES AND ____’S OF SUBSTRUCTURES AND SWITCHES INSTALLED OVER THE LAST __ YEARS.

Answer 10

-50,000 TRANSFORMERS
-250,000 POLES
-1000’S OF SUBSTRUCTURES AND SWITCHES
-70 YEARS

Question 11

GENERATION FACILITIES GENERATE ELECTRICITY BETWEEN _____ & _____ VOLTS

Answer 11

4,000 & 20,000 VOLTS

Question 12

TRANSMISSION LINES RANGE FROM ___KV TO OVER ____KV

Answer 12

69KV TO OVER 1000KV

Question 13

MOST OF THE TRANSMISSION LINES COMING INTO LOS ANGELES ARE ___KV

Answer 13

230KV

Question 14

ALL VOLTAGES ABOVE __KV ARE REFERRED TO AS TRANSMISSION VOLTAGES

Answer 14

69KV

Question 15

STRINGS OF INSULATORS ON TRANSMISSION TOWERS CAN RANGE FROM __ FEET TO __ FEET LONG DEPENDING ON THE VOLTAGE

Answer 15

3FT - 20 FT

Question 16

THE LADWP HAS A NUMBER OF TRANSMISSON LINES WITH VOLTAGES OF ___KV OR ___KV

Answer 16

138KV OR 230KV

Question 17

LADWP HAS __ RECEIVING STATIONS

Answer 17

21

Question 18

LADWP RECEIVING STATION RECEIVES THE ELECTRICITY AT TRANSMISSION VOLTAGES AND STEP THE VOLTAGE DOWN TO ____KV

Answer 18

34.5KV

Question 19

LADWP HAS OVER ___ DISTRIBUTION STATIONS

Answer 19

150

Question 20

DISTRIBUTION STATIONS STEP DOWN ELECTRICITY TO ___KV

Answer 20

4.8KV

Question 21

4.8KV IS KNOWN AS A PRIMARY CIRCUIT VOLTAGE. EACH PRIMARY HAS AN AVERAGE OF ___ CONSUMERS

Answer 21

750

Question 22

LADWP HAS OVER ____ PRIMARY CIRCUITS

Answer 22

1500

Question 23

OVERHEAD TRANSFORMERS ARE INSTALLED ON THE 4.8KV CIRCUITS TO STEP THE VOLTAGE DOWN TO _____

Answer 23

120/240 VOLTS

Question 24

CONDUCTORS ARE MATERIALS THAT…

Answer 24

ALLOW AN ELECTRIC CURRENT TO FLOW THROUGH THEM EASILY

Question 25

INSULATORS ARE APPLIANCES WHICH WILL…

Answer 25

PREVENT FLOW OF ELECTRICITY (GLASS OR PORCELAIN)

Question 26

SERVICE CONNECTION ARE WIRES THAT CONNECT THE CONSUMER OR HOME TO THE SECONDARY TRANSFORMER. THE MOST COMMON IS THREE-WIRE METHOD, WHERE THREE WIRES ARE TWISTED AROUND EACH OTHER, KNOWN AS ______.

Answer 26

TRIPLEX

Question 27

FIREFIGHTERS RESPONDING TO EMERGENCIES INVOLVING ELECTRICAL EQUIPMENT MUST WEAR…

Answer 27

FULL TURNOUTS

Question 28

THERE ARE 2 MAIN METHODS FOR DE ENERGIZING A BUILDING…

Answer 28

#1: OPENING THE MAIN SWITCH OR BREAKER SWITCHES AT ELECTRICAL PANEL #2: CUTTING WIRES UTILIZING LAFD EQUIPMENT

Question 29

THE CUTTING OF WIRES BY FIREFIGHTERS MUST BE CONFINED TO ____ VOLTAGE WIRES

Answer 29

LOW VOLTAGE

Question 30

WHEN CUTTING LOW VOLTAGE WIRES AT THE DRIP LOOP USING MECHANICAL AXE AND GAUNTLET GLOVES, CUT THE ________ CONDUCTOR FIRST.

Answer 30

CLOSEST (TO PREVENT REACHING OVER CHARGED WIRES)

Question 31

THE LOOPS SHOULD BE CUT AT THE SERVICE HEAD. IF IT IS NECESSARY TO CUT AT THE POLE, CUT ____ WIRE AT A TIME BEFORE IT GOES INTO THE TRIPLEX

Answer 31

ONE

Question 32

PIKE POLES, RUBBISH HOOKS, OR OTHER TOOLS SHOULD NOT BE USED TO CONTACT ENERGIZED EQUIPMENT TRUE/FALSE

Answer 32

TRUE

Question 33

FOR VOLTAGES OF 600 OR MORE, CAL/OSHA & NFPA STANDARDS REQUIRE THAT AERIAL LADDERS BE OPERATED AT A MINIMUM CLEARANCE OF __ FT OF POWER LINES AND ELECTRICAL DEVICES

Answer 33

10 FT

Question 34

OVERHEAD COMMUNICATION CABLE NORMALLY FOUND ON THE LOWEST LEVEL OF A POWER POLE CAN BE ENERGIZED WITH UP TO __ VOLTS

Answer 34

50 VOLTS

Question 35

WHEN RESPONDING TO DOWNED OVERHEAD WIRES, HAVE RESPONDING PERSONNEL MAINTAIN THE DISTANCE BETWEEN 2 UNDAMAGED POLES FROM THE AFFECTED WIRE OR POLE TRUE/FALSE

Answer 35

TRUE

Question 36

ACCORDING TO TRAINING BULLETIN #8, STREETLIGHTS CAN BE FED FROM CONDUCTORS CARRYING ____-____ VOLTS OR MORE

Answer 36

120 - 6150 VOLTS

Question 37

30/33/100 RULE

Answer 37

30-DEGREE FOG PATTERN 33FT FROM ENERGIZED SOURCE 100PSI MINIMUM

Question 38

THE CLEARLY IDENTIFIED METHOD TO ASSURE THAT FIRE PERSONNEL AND OTHER RESPONDERS DO NOT ENTER LIFE HAZARD ZONES INCLUDES THE USE OF A MINIMUM OF __ HORIZONTAL STRANDS OF BARRIER TAPE THAT STATE “DO NOT ENTER” OR “DO NOT CROSS”

Answer 38

3 HORIZONTAL STRANDS

Question 39

OCCUPANTS TRAPPED IN A VEHICLE BY ENERGIZED WIRES SHOULD REMAIN IN THEIR VEHICLE UNTIL THE POWER IS DE ENERGIZED. HOWEVER, THEY MAY BE ABLE TO DRIVE THE VEHICLE CLEAR OF WIRES. THE VEHICLE SHOULD BE DRIVEN CLEAR OF THE WIRES BY AT LEAST ___ FT.

Answer 39

35 FT

Question 40

INSTRUCTING VICTIMS TO EXIT A CHARGED VEHICLE IS VERY DANGEROUS AND SHOULD BE DONE ONLY WHEN A LIFE-THREATENING EMERGENCY EXISTS TRUE/FALSE

Answer 40

TRUE

Question 41

FIREFIGHTERS AND FIRST RESPONDERS MUST REMAIN AWAY FROM A CHARGED VEHICLE AND RESIST THE URGE TO APPROACH OR GRAB THE VICTIM TRUE/FALSE

Answer 41

TRUE

Question 42

MANHOLE COVERS OFTEN WEIGH ___LBS AND HAVE BEEN BLOWN ___FT INTO THE AIR AND A DISTANCE OF ___FT.

Answer 42

300LBS 75FT INTO THE AIR 125FT OUT

Question 43

THE LADWP TESTS GLOVES TO ______ VOLTS EVERY ___ DAYS

Answer 43

10,000 VOLTS EVERY 60 DAYS

Question 44

A SQUARE MANHOLE INDICATES A…

Answer 44

TRANSFORMER VAULT

Question 45

THE MAIN FIRE HAZARD WITHIN ELECTRICAL VAULTS LIES IN THE COOLING OIL USED IN THE TRANSFORMERS, WHICH HAS A FLASHPOINT BELOW ___°F

Answer 45

300°F