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Training bulletins > TB 8 > Flashcards

TB 8 Flashcards

1
Q

Electrical Accidents account for ___ deaths per year

A

700

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2
Q

Electrocution accounts for ____ percent of worker deaths annually

A

12

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3
Q

In the past ____ years electrocutions have accounted for more than ____ firefighter deaths

A

20

25

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4
Q

LAFD responds to over _____ electrical incidents annually

A

3000

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5
Q

Amps is the ______ and is equivalent to hydraulics_____

A

Current Flow

GPM

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6
Q

Volts is the currents ______ and equivalent to hydraulics _______

A

Pressure or push

PSI

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7
Q

OHMS is a measurement of ________
Equivalent to hydraulics _______

A

Resistance

Friction loss

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8
Q

Ohms Law Equations

A

Watt= amps x volts
Amps = watts + volts
Volts = watts + amps

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9
Q

Extremely High voltage is ______

A

Excess of 60,000 volts

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10
Q

Extremely High voltage is ______

A

Excess of 60,000 volts

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11
Q

High voltage is _______

A

600 - 59,999 volts

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12
Q

Low voltage is ______

A

Less than 600 volts

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13
Q

LADWP primaries are usually ________

A

4.8kvs

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14
Q

Transmission lines range from ______ volts to ________ volts. With most in LA being ______

A

69kv

1000kv

230kv or higher

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15
Q

Generation systems generate _______ to _______

A

4000 to 20000

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16
Q

High voltage capacitors can hold charge for

A

Weeks

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17
Q

Transmission insulator sizes

A

3-20 feet long

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18
Q

LADWP has some transmission lines at ______ kv to ______ kv

A

138

230

19
Q

LADWP has _____ receiving stations

A

21

20
Q

Receiving stations receive electricity at ____ to _____ and step down voltage to _____ kv which is known as sub transmission

A

138 to 500

34.5

21
Q

Voltage is stepped down ____ times before reaching consumer

A

3

22
Q

There are over _____ distribution stations where electricity is received at ______ and stepped down to ______ which is known as _______

A

150

34.5kv

4.8kv

Primary circuit voltage

23
Q

LADWP has over ______ primary circuits each with an average of ______ consumers

A

1500

750

24
Q

3 Ways of determining high voltage

A
  1. High voltage signs on cross arms
  2. Size and shape of insulators
  3. Distance between conductors
25
Q

_____ amps of electricity for ____ seconds can cause death

A

1/10

2

26
Q

_____ milliamperes can cause paralysis and muscles to freeze

A

10

27
Q

Heart paralysis and damage to organs occurs at ____ amps

A

4

28
Q

Tissue is burned at amps greater than

A

5

29
Q

4 types of electrical injured

A
  1. Electrocution
  2. Electrical shock
  3. Burns
  4. Falls
30
Q

2 ways to shutdown power

A
  1. Main breakers
  2. Cutting wires
31
Q

Aerial Ladders are placed a minimum of ___ft from power lines

A

10

32
Q

Comm lines can be charged up to

A

50 volts

33
Q

Spot apparatus at least ____ away from incident

A

1 pole span

34
Q

Streetlight voltage

A

120-6150

35
Q

30/33/100 Rule

A

30 degree fog
33 feet away
100 psi minimum

36
Q

During rescue vehicle should be driven minimum ____ ft away from source

A

35

37
Q

Safe distance from transmission towers on wildland fires

A

Minimum 35 feet

Minimum 100 feet clearance beyond outermost wire

38
Q

LADWP can deenergize lines for ____ minutes

A

5-10

39
Q

LADWP patrolmen can are on call ____ hours and can reach any part of the city within ____ minutes

A

24 hours

10 minutes

40
Q

Explosive range of carbon monoxide

A

12.5-74 percent

41
Q

Manhole covers can weigh _____ lbs and can blow ____ feet in air and a distance of ______ feet.

A

300

75

125

42
Q

Cooling oil flash point

A

300 degrees F

43
Q

Underground high voltage cables up to _____ volts can be located inside conduit containing ____ psi oil pressure

A

230,000

200

Training bulletins (22 decks)

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