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Fire > Chapter 7 > Flashcards

Chapter 7 Flashcards

1
Q

List the symbol, colour and materials for a class D extinguisher

A
  • Star
  • Yellow
  • Combustible Metals (Magnesium, Sodium, Lithium, Potassium, Titanium, Zirconium)
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2
Q

List the symbol, colour and materials for Class B extinguishers

A
  • Red
  • Square
  • Greases, Oils, Solvents, Flammable and Combustible liquids
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3
Q

List the symbol, colour, and materials for a Class A extinguisher

A
  • Triangle
  • Green
  • Wood, Cloth, Paper, Rubber, Plastics
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4
Q

List the symbo, colour, and materials for a class C extinguisher

A
  • Circle
  • Blue
  • Fires involving energized electrical equipment
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5
Q

List the symbol, colour, and materials for a class K extinguisher

A
  • No symbol
  • No colour
  • Commercial cooking units involving vegetable or animal oils and fats
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6
Q

Define Saponofication

A

A reaction that emulsifies the oil to form a type of soap that floats on teh surface of the oil & prevents re-ignition of the oil vapors

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7
Q

What colour and symbol correlate to a class K extinguisher

A

No colour

No symbol

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8
Q

An expert can extinguish how many times more than a fire extinguisher’s rating?

A

2.5x

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9
Q

How much fuel with a B-1 extinguisher?

10-B?

A
  • 1-B
    • 0.09sqm (1sqft)
  • 10-B
    • 0.9sqm (10sqft)
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10
Q

What is the PASS for fire extinguishers?

A

P- Pull

A- Aim

S- Squeeze

S- Sweep

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11
Q

What fuels compose a Class B fire?

A

Greases, Oils, Solvents, Flammable and Combustible liquids

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12
Q

What materials compose a Class A fire

A

Wood, Cloth, Paper, Plasitcs, Rubber

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13
Q

What classifies a Class C fire?

A

Fires involving energized electrical equipment

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14
Q

What fuels burn in Class D fires?

A

Flammable and combustible metals

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15
Q

How many and what size of wood cribbing is used to test Class 1- A fires?

A

50 pieces of 50 cm x 5 cm x 5 cm

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16
Q

What hazard is present when using a CO2 fire extinguisher

A

Re- Ignition

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17
Q

What are the CO2 fire extinguishers located.

A

Pump

Rescue

Ladder

Tankers

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18
Q

How much extinguishing agent can a pump/ tank backpack water extinguisher carry?

A

~20l

Can add foam to mixture 0.5-0.6% foam

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19
Q

How much does Metal X extinguishesr weigh?

A

14 kg

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20
Q

What is the discharge time and distance of

Metal X extinguishers

A
  • 10-25 Sec
  • 2 - 4.5m
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21
Q

What are the extinguishers found on EFRS Ladders

A
  • ABC
    • 20A-60BC
    • Dry Chemical
  • BC
    • 10BC
    • CO2
  • D
    • Metal X (quints)
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22
Q

What is the discharge Time and Distance of CO2 10BC extinguishers

A
  • 10-30Sec
  • 1-2.5m
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23
Q

What exinguishers are carried on EFRS Rescues

A
  • ABC
    • 20A60BC
    • Dry chemical
  • BC
    • 10BC
    • CO2
  • D
    • Metal X
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24
Q

What is the Discharge Time and Distance of Dry Chamical extinguishers (20A60BC)

A
  • 10-25Sec
  • 2-4.5m
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25
Q

What is the Discharge time and Distance of Backpack Pump 4A

A
  • 60-180s
  • 3-9m
26
Q

Which extinguishers are carried on EFRS Pump/Tanker/ATP?

A
  • ABC
    • 20A60BC
    • Dry Chemical
  • BC
    • 10BC
    • CO2
  • A
    • 4A
    • Backpack Pump- Water
27
Q

What criteria must class K extinguishrers meet?

A
  • Completely extinguish the fire in the deep fryer
  • Prevent re-ignition of the vegetable oil for 20 min or reduce the oil temperature at least 15.6 deg C below auto-ignition temperature
  • Cause no splashing of flaming oil outside the fryer
28
Q

What depth is “appreciable”

A

>/= 6mm

29
Q

Class B fire extinguishers typical Size range?

A

1B- 160B

30
Q

What types of extinguishing agents are used for Class A fires

A
  • Water
  • Foam concentrate mix
  • Dry chemical
  • Halon
31
Q

Most Class A pertable fire extinguishers are rated

A

1A- 40A

32
Q

What is the fire extinguisher distribution for an:

Extra Hazard Occupancy

A

4 units every 23m

33
Q

What is the fire extinguisher distribution for an ordinary Hazard occupancy

A

2 units every 23m

34
Q

What ratings are given to Class K fire extinguishers

A

None given

35
Q

What action does the Sodium Chloride provide as an extinguishing agent?

A

Heat Sink

Forms oxygen- excluding crust

36
Q

What other components make up a Class D extinguishing agent (Sodium cloride Primary agent)

A
  • Thermoplastic powder
  • Waterproofing (metal stearates)
  • Anti- caking materials (tricalcium phosphate)
37
Q

Which combustible metals use Sodium Chloride as an extinguishing agent?

A
  • Magnesium
  • Potassium
  • Sodium
  • Titanium
  • Sodium Potassium alloys

Met L-X, Super D extinguishing agents

38
Q

Why must the Class D extinguisher agents be compatible with the metal burning?

A

Not all extinguishing agents are compatable with all combustible metals

39
Q

What ratings are given to Class C fire extinguishers

A

No testing or numerical rating

40
Q

What ratings are given to Class D fire extinguishers

A

No numerical ratings

41
Q

What extinguishing agents are used in Class C extinguishers

A
  • Dry chemical
  • CO2
  • Halon
  • Inert Gases (ie: argon)
42
Q

What extinguishing agents are used in Class B extinguishers

A
  • Dry chemicals
  • CO2
  • Halon
  • Aqueous FIlm Forming Foams (AFFF)
  • Film Forming Flouroproteins (FFFP)
43
Q

How often must portable fire extinguishers found in apartments. hi-rises, commercial, and retail outlets (etc) be inspected, servicesd and certified?

A

annually

44
Q

How often must food service industry range extinguisher units be inspected, serviced, and certified

A

6 months

45
Q

What safety factors must be met when using a dry powder Fire extinguisher

A
  • REACT
  • Ensure a safe approach and safe egress
  • Ensure the power source energizing the fire is disconnected
  • Ensure the dry powder is compatible with the burning metal
  • PASS to apply the dry powder onto the burning material
  • Dry powder can be scooped or shovelled onto the fire
  • Watch for burn through of the dry powder
  • Range is limited ~2m -4.5m
  • Discharge time 10-25s
  • Avoid inhaling the dry chemical dust
  • Back away from the fire
46
Q

What components make up an assessment of the situation, prior to using a portable fire extinguisher

A
  • Size up teh Class & Volume of burning material
  • Select a portable fire extinguisher of the correct class and rating to meet the demands of the fire
  • Evaluate the wind or internal environment to maintain a safe access route to the fire
  • Maintain a route for safe egress from the fire room
  • Use the PASS system for operating the extinguisher
47
Q

What operational and safety factors must be used with CO2 fire extinguishers

A
  • REACT
  • Ensure a safe approach and egress
  • Ensure the power source energizing the fire is disconnected
  • PASS to apply the CO2 onto the burning material
  • Effectiveness is limited in windy conditions
  • Effective when used in confined spaces
  • Range is limited ~1-2.5m
  • Discharge time 10-30s
  • CO2 gas temperature can reach -100deg C
  • Static electricity will build up in the horn during discharge- ensure you hold the grounded hose when operating
  • Ensure exposed flesh is not in contact with the discharge horn
  • Back away from the fire
48
Q

What safety and operational factors must be used when operating a Dry Chemical fire extinguisher

A
  • REACT
  • Ensure a safe approach and egress
  • Ensure the power source energizing the fire is disconnected
  • PASS to apply the dry chemical onto the burning material
  • Effectiveness is limited in windy conditions
  • Range is limited 2-4.5m Discharge ~10-25s
  • Avoid inhaling dry chemical dust
  • Back away from fire
49
Q

Backpack pump-tank water extinguisher checks include:

A
  • The appropriate extinguisher in its designated location
  • Signs of physical damage to the pack straps or tank bladder
  • Signs of cracking on the fill cap rubber seal
  • Signs of cracking on hoses or obstructions to nozzles
  • Effectiveness of hand pump
50
Q

What should Fire extinguishers be checked for

A
  • Proper extinguisher in designated location
  • Extinguisher is fully charged
  • Examine for broken witness wire or other signs of previous use
  • Signs of tank corrosion or other physical damage
  • Signs of cracking on hoses, or obstructions to nozzles
  • Date of last hydrostatic test of extinguisher shell
  • Date of last inspection
51
Q

When should apparatus extinguishers be inspected

A

During regular vehicle inventory checks

52
Q

What class ratings to Halon fire extinguishers carry

A

Class A-B-C

*Most useful for class C

53
Q

Which extinguishing agent is used by EFRD for Class D fires

A

Metal-X

54
Q

Where are Dry chemical extinguishers located (which apparatus)

A

Pumps

Tankesr

Ladders

Rescue

ATP

55
Q

What size ranges do portable Dry Chemical extinguishers come in?

A

0.5-14kg

*will not exceed 25kg for portable

56
Q

Where are Dry Powder extinguishers located in EFRS (which apparatus)

A

Rescue

Quints

57
Q

List the common dry chemical extinguishing agents

A
  • Multi purpose triplex chemical mono-ammonium phosphate (ABC)
  • Sodium bicarbonate
  • Potassium bicarbonate
  • Potassium Chloride
58
Q

What two classes are Dry Chemical rated for?

A
  • Ordinary
    • Class B & C
  • Multipurpose
    • Class A- B- C
59
Q

Explain the basic fire extinguisher assessment of a situation

A
  • Size up the calss and volume of material burning
  • Select a portable fire extinguisher of the proper class and rating
  • Evaluate the wind or internal environment
  • Maintain a safe access route
  • Maintain a safe egress route
  • Use the PASS system for fire extinguisher effectively
60
Q

Explain the REACT mnemonic

A
  • Rescue
    • Initial evacuation of the people in the room containing the fire
  • Ensure Door is closed
    • after evac. close the doors to reduce the risk for fire spread and to extend tenable atmosphere in other rooms
  • Activate Alarm
    • activate the building alarm, or send some one to notify others inside
  • Call 911
    • activate other emergency resources in the event the fire extinguisher cannot contain the fire
  • Try to extinguish
    • Return to fire room and attempt to use the apporopriate extinguisher to control the fire
61
Q

What four components make up a Dry chemical fire extinguisher

A
  • Pressure vessel
  • Valve
  • Pressurizing gas
  • Extinguishing agent
62
Q
A

Fire (15 decks)

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