brodidit for students
10.1 Fire principles
NEBOSH IGC · Workplace hazards · 15 questions
Name: ____________________ Date: ____________
The three sides of the fire triangle are:
- A Ignition, fuel and oxygen
- B Fuel, water and air
- C Flame, gas and spark
- D Heat, smoke and light
Heat transfer by hot gases rising is called:
- A Conduction
- B Direct burning
- C Radiation
- D Convection
Which of these is a common ignition source?
- A Concrete
- B Faulty electrical equipment
- C Paint cans closed in a cupboard
- D Water
Removing the fuel from a fire is a way to:
- A Break one side of the fire triangle
- B Increase the fire
- C Add ignition
- D Add oxygen
Which of these is a fuel in a workplace fire?
- A Paper and wood
- B Water
- C Nitrogen only
- D Sand
An oxidising material can:
- A Cool the fire
- B Remove ignition
- C Remove oxygen
- D Supply extra oxygen to a fire
Class B fires in the widely used system involve:
- A Flammable liquids
- B Metals
- C Gases only
- D Ordinary solids
Class A fires in the widely used system involve:
- A Ordinary solids such as wood and paper
- B Flammable liquids
- C Gases
- D Cooking oils
Conduction is the transfer of heat:
- A By rising hot gases
- B By direct flames only
- C Through solids
- D By heat waves through air
Radiation as a method of heat transfer is:
- A Heat by flame contact
- B Heat in a rising gas
- C Heat waves that travel through air
- D Heat through a solid
Direct burning as a method of spread is:
- A Rising hot gases
- B Heat through metal
- C Heat waves
- D Flames touching combustible material
Which of these is a common cause of workplace fires?
- A Fire doors
- B Good housekeeping
- C Electrical faults
- D Cold weather
A consequence of a workplace fire can be:
- A Less insurance cost
- B Death and injury and loss of business
- C No damage
- D Higher profits
Hot work is a common ignition source because it:
- A Produces no heat
- B Removes oxygen
- C Produces sparks and heat
- D Removes fuel
In a fire, electrical equipment should be dealt with by:
- A Cutting the supply, then treating the fire by the material burning
- B Ignoring it
- C Using foam on live parts first
- D Spraying water on live equipment
Answer key
1. A, 2. D, 3. B, 4. A, 5. A, 6. D, 7. A, 8. A, 9. C, 10. C, 11. D, 12. C, 13. B, 14. C, 15. A
Remove one and the fire goes out.
Convection.
Electrical faults are a common cause.
Controls work by removing one side of the triangle.
Fuels include solids, liquids and gases.
Oxygen also comes from the air.
Class A is ordinary solids, Class C gases and Class D metals.
Local classifications differ, so use the system taught in your own country.
Convection is by rising hot gases.
It can ignite objects at a distance.
Flame contact spreads fire.
Arson, smoking, hot work and heating equipment are other causes.
Environmental harm is another consequence.
A permit to work is used.
Water on live equipment is dangerous.