Brainscape's Knowledge GenomeTM

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


See full index

Nebosh-Fire > Terminology > Flashcards

Terminology Flashcards

1
Q

Conduction

A

Fires spread through direct contact between materials.

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

Convection

A

Heat from a fire is trapped by a ceiling or rooftop and then spreads horizontally.

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

Radiation

A

The transfer of heat in the air due to electromagnetic waves. This heat can travel in multiple directions.

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

Direct burning

A

Heat comes into contact with a combustible material.

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

The four methods heat can be transferred.

A

Conduction - Convection - Radiation - Direct burning.

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

The three basic stages of combustion are…

A

Induction - Fire growth - Decay

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

Two phenomena that increase the risk of a fire

A

Flashover - Backdraught

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

Flashover

A

The near-simultaneous ignition of most directly exposed combustible material in an enclosed area.

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

Backdraught

A

The abrupt burning of superheated gases in a fire is caused when oxygen rapidly enters a hot, oxygen-depleted environment; for example, when a window or door to an enclosed space is opened or broken

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

What is the fire triangle?

A

Oxygen - Heat - Fuel

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

The three main reasons why an organisation has to maintain good fire safety standards are -

A

Social - Economic - Moral

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

What is a Primary Fire?

A

Has casualties - Involves a property - Attendance of at least five appliances - Involved a rescue.

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

What is a Secondary Fire?

A

Attendance of four or fewer appliances - Did not involve a rescue, casualties or property

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

RRFSO

A

Regulatory Reform (Fire Safety) Order

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

ILO

A

International Labour Organisation.

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

ISO

A

International Organisation for Standardisation.

17
Q

Flash point

A

The lowest temperature at which there is sufficient vapourisation of a substance capable of producing a flash momentarily when an ignition source is applied.

18
Q

Fire point

A

The temperature at which a fuel will continue to burn after ignition. (Five seconds or more).

19
Q

Ignition point

A

The temperature at which a material has to be heated for sustained combustion to be initiated by a pilot source.

20
Q

Auto ignition temperature

A

The lowest temperature a substance or material will ignite spontaneously without the presence of a pilot source of ignition. Also known as kindling point.

21
Q

Vapour density (Mass of vapour per unit volume) or Relative vapour density (Density of vapour relative to air).

A

Indicates whether a flammable vapour is likely to rise in the air or, more commonly, sink and accumulate in low-lying areas.

22
Q

Vapour pressure

A

The pressure exerted by a vapour when a liquid and a vapour are in equilibrium (such as a closed vessel). It increases with temperature and high vapour pressure at a given temperature means the liquid in extremely volatile and likely to produce a flammable vapour.

23
Q

Flammable liquid

A

The flash point of between 23 degrees C and 60 degrees C. Around ambient temperature.

24
Q

Highly flammable liquid

A

The flash point of less than 23 degrees C and a boiling point of 35 degrees or more.

25
Q

Extremely flammable liquids

A

Liquids having a flash point of less than 23 degrees C and a boiling point of less than 35 degrees C. High volatility.

26
Q

LFL and LEL

A

Lower flammable limit and lower explosive limit

27
Q

UFL and UEL

A

Upper flammable limit and upper explosive limit

28
Q

Inerting

A

The introduction of an inert (non-combustible) gas into a closed system (e.g. a container or a process vessel) to make a flammable atmosphere oxygen deficient and non-ignitable

29
Q

Lower flammable limit

A

When mixed with air, the lowest gas concentration will support a self-emitting flame. Below the lower flammability limit, there is not enough fuel to support combustion

30
Q

Upper flammable limit

A

The upper flammable limit (UFL) identifies the richest flammable mixture.

31
Q

The basic conditions required for ignition to occur are

A

A mixture of fuel and oxygen in a concentration in the flammable range.
The input of sufficient heat energy.

32
Q

The two basic categories of explosion

A

Detonation - Deflagration

33
Q

UVCE

A

Unconfined Vapour Cloud Explosion

34
Q

CVCE

A

Confined Vapour Cloud Explosion

35
Q

BLEVE

A

Boiling Liquid Expanding Vapour Explosion

36
Q

The four types of explosions

A

UVCE - CVCE - BLEVE - Dust explosion

37
Q

What are the main factors and conditions determining the likelihood of a dust explosion? - 5

A

The presence of an ignition source - Combustibility or explosibility of the substance - Moisture content - Particle size - Concentration in the air.

38
Q
A

Nebosh-Fire (1 decks)

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