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Zebras > Extinguishers > Flashcards

Extinguishers Flashcards

1
Q

Many fire extinguishers use up there supply in

A

8-10 seconds

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2
Q

Typical expelling gas used in extinguishers is

A

Nitrogen

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3
Q

Six methods of expulsion are

A
  • self generating
  • self expelling (co2)
  • Gas cartridge or cylinder (nitrogen)
  • stored pressure (common)
  • mechanically pumped (water)
  • Hand Propelled
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4
Q

Acronym for fire extinguishers

A

P - pull pin
A - aim at base of fire
S - squeeze discharge lever
S - sweep rapidly back and forth

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5
Q

When inspected, how is internal fullness checked

A

Weighing or hefting

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6
Q

Extinguishers are inspected

A

Monthly

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7
Q

Class A shape and colour

A

Green Triangle

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8
Q

Class B shape and colour

A

Red Square

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9
Q

Class C shape and colour

A

Blue circle

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10
Q

Class D shape and colour

A

Yellow star

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11
Q

Class K shape and colour

A

Black hexagon

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12
Q

Class A hazard

A

Ordinary combustible (wood, paper, fabric)

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13
Q

Class B hazard

A

Flammable Fuels

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14
Q

Class C hazard

A

Energized electrical

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15
Q

Class D hazard

A

Combustible metals

(Magnesium, Titanium, Zirconium, Sodium, Potassium)

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16
Q

Class K hazard

A

Cooking materials

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17
Q

Dry Chemical extinguisher is used on which class of fire

A

B & C

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18
Q

Multi-Purpose Dry chem is used on what fires

A

A, B & C

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19
Q

What’s the difference between dry chem and multi purpose dry chem

A

Multi-Purpose has ammonium phosphate in it

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20
Q

2 basic styles of Dry chem extinguishers is

A

Stored pressure
Cartridge operated

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21
Q

Wet chemical extinguishers can be used with what classes of fires

A

Class A & K

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22
Q

Wet chemical extinguishers using a base agent of

A

Aqueous solution of organic salts that form an extinguishing agent

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23
Q

Dry powder is used to extinguish what class of fires

A

Class D

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24
Q

How does dry powder prevent re ignition

A

Forming hard crust on metal

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25
Q

dry chem discharge range

A

6-8ft

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26
Q

Water extinguisher has a range of

A

35-40ft

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27
Q

Foam extinguisher has a range of

A

25-30ft

28
Q

Water approx. discharge time

A

55 seconds

29
Q

Water extinguisher most common size

A

2.5 gal

30
Q

Water mist contains what and is used where

A

-De-ionized water
-used where unregulated amounts of water used could cause excessive damage (museum, library)

31
Q

Halon isn’t used in regular circumstances anymore because

A

It causes damage to the ozone layer

32
Q

Halon was used on

A

Class B or C fires

33
Q

2 most common types of halon are

A

1211 and 1301

34
Q

CO2 extinguishers should be discharged from horn at

A

45 degree angle

35
Q

CO2 is not to be used on

A

Pressurized Fuel

36
Q

CO2 extinguishers are to be used on what classes

A

Class B & C

37
Q

CO2 discharge method

A

Self expelling (due to its high pressure at room temp)

38
Q

CO2 max discharge range

A

3ft to 8ft

39
Q

What year did all inverting types of extinguishers stop being manufactured

A

1969

40
Q

Types of inverting extinguishers

A

Soda acid
Foam
Cartridge operated water and
Loaded stream type

41
Q

Two basic types of water extinguishers are

A

Stored pressure
Pumped pressure

42
Q

What kind of acid in “soda acid extinguisher”

A

Sulfuric acid

43
Q

Soda acid extinguisher has what added into the water

A

Sodium bicarbonate

44
Q

Nozzle on foam extinguisher is

A

Air aspirating

45
Q

CO2 is stored in a heavy shell at pressures up too

A

800-900psi

46
Q

Dry chem come in sizes

A

5-30lbs

47
Q

Signs on extinguishers shall indicate

A

Purpose
Content
Usage

48
Q

Markings on extinguishers shall be legible from

A

3 feet

49
Q

Markings on wall panels shall be legible from

A

15 feet

50
Q

Hydrostatic test every

A

5 OR 12 years (depends on discharge method)

51
Q

Extinguisher under 40Lbs mounting height

A

No more then 5ft

52
Q

Extinguisher over 40Lbs

A

3 1/2’ max from floor

53
Q

Never shall an extinguisher be located less then ____ off the floor

A

4”

54
Q

Max distance between extinguishers is

A

75ft

55
Q

Minimum “A” rating light hazard

A

2-A

56
Q

Minimum “A” rating ordinary hazard

A

2-A

57
Q

Minimum “A” rating extra hazard

A

4-A

58
Q

Minimum floor area per unit of “A”light hazard

A

3000sqft

59
Q

Minimum floor area per unit of “A” ordinary hazard

A

1500sqft

60
Q

Minimum floor area per unit of “A” extra hazard

A

1000sqft

61
Q

Maximum floor area per unit extinguisher

A

11, 250sqft

62
Q

Water extinguishers interrupt the fire triangle by

A

Removing heat

63
Q

Foam extinguishers interrupt the fire triangle by

A

Separate the oxygen

64
Q

Carbon dioxide extinguishers interrupt the fire triangle by

A

Takes away oxygen, and removes heat with very cold discharge

65
Q

Dry Chem extinguishers interrupt the fire triangle by

A

Creates a barrier between oxygen and the fuel

66
Q

Wet chem extinguishers interrupt the fire triangle by

A

Barrier between oxygen and fuel

67
Q

Dry powder extinguishers interrupt the fire triangle by

A

Separating the fuel from oxygen, and removing heat

Zebras (7 decks)

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