10.1 Fire principles

The three sides of the fire triangle are:

• 1 Ignition, fuel and oxygen
• 2 Fuel, water and air
• 3 Flame, gas and spark
• 4 Heat, smoke and light

Heat transfer by hot gases rising is called:

• 1 Conduction
• 2 Direct burning
• 3 Radiation
• 4 Convection

Which of these is a common ignition source?

• 1 Concrete
• 2 Faulty electrical equipment
• 3 Paint cans closed in a cupboard
• 4 Water

Removing the fuel from a fire is a way to:

• 1 Break one side of the fire triangle
• 2 Increase the fire
• 3 Add ignition
• 4 Add oxygen

Which of these is a fuel in a workplace fire?

• 1 Paper and wood
• 2 Water
• 3 Nitrogen only
• 4 Sand

An oxidising material can:

• 1 Cool the fire
• 2 Remove ignition
• 3 Remove oxygen
• 4 Supply extra oxygen to a fire

Class B fires in the widely used system involve:

• 1 Flammable liquids
• 2 Metals
• 3 Gases only
• 4 Ordinary solids

Class A fires in the widely used system involve:

• 1 Ordinary solids such as wood and paper
• 2 Flammable liquids
• 3 Gases
• 4 Cooking oils

Conduction is the transfer of heat:

• 1 By rising hot gases
• 2 By direct flames only
• 3 Through solids
• 4 By heat waves through air

Radiation as a method of heat transfer is:

• 1 Heat by flame contact
• 2 Heat in a rising gas
• 3 Heat waves that travel through air
• 4 Heat through a solid

Direct burning as a method of spread is:

• 1 Rising hot gases
• 2 Heat through metal
• 3 Heat waves
• 4 Flames touching combustible material

Which of these is a common cause of workplace fires?

• 1 Fire doors
• 2 Good housekeeping
• 3 Electrical faults
• 4 Cold weather

A consequence of a workplace fire can be:

• 1 Less insurance cost
• 2 Death and injury and loss of business
• 3 No damage
• 4 Higher profits

Hot work is a common ignition source because it:

• 1 Produces no heat
• 2 Removes oxygen
• 3 Produces sparks and heat
• 4 Removes fuel

In a fire, electrical equipment should be dealt with by:

• 1 Cutting the supply, then treating the fire by the material burning
• 2 Ignoring it
• 3 Using foam on live parts first
• 4 Spraying water on live equipment