Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

LFB Policy Notes & FRU (2020) > Fireworks and Explosives - Incidents and fires Involving Explosive Materials (PN 806) > Flashcards

Fireworks and Explosives - Incidents and fires Involving Explosive Materials (PN 806) Flashcards

1
Q

Explosive Hazards will be identified by what term?

A

‘Yankee Hazard’

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the correct Hazard Zone in metres for explosives up to 250kg (approximately the size of a small car)

A

200 metres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the maximum storage of fireworks for domestic use in a shop (in kgs)?

A

250kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Radios must not be used within how many metres of explosives:
A) 30 metres
B) 50 metres
C) 60 metres?

A

C) 60 metres

This may be relaxed once specialist advice has confirmed that the material is not sensitive to the effects of radio transmissions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A 600 metres Hazard Zone must be established in what 2 circumstances?

A

1) Explosives 251kg - 2000kg

2) Military Explosive Munitions HD1.2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Where military or malicious explosive devices are suspected radio transmissions should be avoided within how many meters of the device?

A

600 metres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In the event of explosives in excess of 2000 kg what should the hazard zone be?

A

1000 metres (1km)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Gun enthusiasts who hold an ‘acquire and keep certificate’ are licensed by the police to keep upto how many kgs of black powder stored in metal boxes:
A) 1 kg
B) 5 kgs
C) 20 kgs

A

C) 20 kgs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the 2 types of explosive materials identified in the note?

A

Detonating and Deflagrating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In a Deflagrating explosion does the reaction exceed the speed of sound?

A

No, in a Detonating explosion the reaction exceeds the speed of sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the most common accidental cause of explosion?

A

Natural Gas and air following a gas leak

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When are ALL explosives considered at the greatest risk of detonation?

A

Whilst being subjected to heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Many explosives are sensitive to shock or friction and what else identified in the note? (3)

A

1) Chemical Reaction
2) Water
3) Grease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The packaging which surrounds the explosives will influence the speed of the reaction. Metal boxes will lead to what type of detonation?

A

Mass explosion.

Note it is unlikely that any explosive can be extinguished safely when ignited

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Fragments from containers involved in an explosion can be propelled great distances and travel at velocities how many times the speed of sound, 2, 3 or 4?

A

3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is it in an ‘Initial blast wave’ that can kill without involving any fragments, which are often in the second wave?

A

‘Over Pressure’ which also traveling at velocities greater than the speed of sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Does hard cover provide protection from Over Pressure?

A

Not always as high pressure will wrap around cover because high pressure will always move to a low pressure region.

18
Q

Anyone standing in line of sight of an explosion with a hard surface behind them will be subject to more or less pressure?

A

More, double the Over Pressure due to the reflected pressure wave

19
Q

Domestic fireworks are likely to present a relatively low hazard but can produce a fire ball 100m’s in diameter. How far in meters are they designed to be propelled before the pyrotechnic element discharges?

A

50 - 100 metres

20
Q

What does the abbreviation ISO stand for (as in ISO shipment container)?

A

International Standards Organisation

21
Q

When do fireworks stored correctly in an ISO shipment container with plenty of space around the fireworks begin to present a significant risk of explosion?

A

When the container is subjected to heat from a fire

22
Q

What does the abbreviation NEQ stand for?

A

The Net Explosive Quantity.

This should be recorded on the ORD following the 7.2 d process

23
Q

Who are the licencing authority for bulk storage of fireworks:

The Local Authority (LA)
The Health and Safety Executive (HSE)
The London Fire Brigade

A

The HSE

24
Q

Where crews find a shop selling/storing fireworks for short periods they should liaise with the local regulatory fire safety team. Should an ORD entry be made for the premises?

A

Yes and a short term re-inspection planned

25
Q

Does sporting ammunition used by members of the public holding a gun licence require recording on the ORD?

A

No as this type of storage poses less of a hazard than exploding aerosol cans. Storage of quantities of black powder however does require an entry.

26
Q

What is the symbol displayed on the MDT used to signify a Yankee Hazard?

A) A red triangle with a black explanation mark
B) A yellow riangle with a black explanation mark
C) A yellow triangle with a black X

A

A) A red triangle with a black explanation mark

27
Q

The IC and driver must consider safe distances for siting appliances on arrival and then there is a list of 9 pieces of relevant information that the IC should gather from the responsible person, can you list 7?

A

1) Quantity
2) Type
3) Location
4) Storage
5) Separation
6) Involvement
7) Site Plans
8) Fixed FF installations
9) Safety control measures/building design features

28
Q

The IC may obtain information from what other sources?

A

Signage and where safe to do so labels and packaging

29
Q

When should a message be sent from the IC be sent?

A

A priority message must be sent as soon as the IC confirms that they are involved:
‘Explosives confirmed involved’

30
Q

Why should no attempt be made to enter a compartment or container where explosives suspected of being heated are stored?

A

The introduction of fresh air could trigger an explosion

31
Q

When may Fire Crews be used to move explosives?

A

To prevent them from becoming involved following a Risk Assessment with advice from competent person

32
Q

How much black powder do ‘Railway fog signals’ contain (in grams)?

A) 2
B) 4
C) 8

A

8 grams

They are only an issue when stored in bulk in metal boxes

33
Q

What additional advice should be given to members of the public asked to stay indoors be given? (3)

A

I) Stay away from windows
II) Keep curtains/blinds drawn
III) Remain in the side of building furthest from the incident

34
Q

Evacuation Routes should utilise what, where possible?

A

Hard Cover

35
Q

Prior to opening the doors. What 3 actions are listed in the note for consideration where a fire has impinged an ISO container storing fireworks?

A

1) Use of TIC
2) Apply water using openings or hatches *it also suggests making alternative openings!!!????!!! Don’t
3) Door opening procedures

36
Q

Explosives form Hazard Division (HD) 1 within the UN (United Nations) classification system.

There are 6 divisions within the class. HD 1.1 (an article/substance with a mass explosion hazard) to HD 1.6 (very insensitive with no mass explosion hazard)

What type of plate is this UN Division displayed on?

A) Red Diamond
B) Yellow Diamond
C) Orange Diamond

A

C) Orange Diamond

37
Q

ADR is a French abbreviation for European agreement on the transport of dangerous goods by road which dates back to 1957

Under the dangerous goods regulations 2009 what are vehicles required to have fixed to the front and rear of the transport unit?

A) Plain Orange plate (rectangular)
B) Plain Yellow plate (rectangular)
C) Plain Red plate (rectangular)

A

A) Plain Orange Plate (rectangular)

38
Q

ADR markings have been adopted by Network rail. The train driver will have a manifest of any explosives carried. Where else might IC obtain the information?

A

Through TOPS (total operations processing system) via control

39
Q

Buildings fixed ISO containers have a separate type of marking. There are 4 Fire Divisions, 1 being Mass explosion and 4 being Fire no blast match the correct number to the correct shape

1
2
3
4

Diamond
Inverted Triangle
Octagon
Cross

A
  1. Octagon - Mass Explosion
  2. Cross - Non Mass Explosion, fragment producing
  3. Inverted Triangle - ass fire minor blast or fragment
  4. Diamond - Moderate fire no blast
40
Q

Buildings fixed ISO containers have a separate type of marking. There are 4 Fire Divisions, 1 being Mass explosion and 4 being Fire no blast match the correct number to the correct shape

1
2
3
4

Diamond
Inverted Triangle
Octagon
Cross

A
  1. Octagon - Mass Explosion
  2. Cross - Non Mass Explosion, fragment producing
  3. Inverted Triangle - ass fire minor blast or fragment
  4. Diamond - Moderate fire no blast

LFB Policy Notes & FRU (2020) (33 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions