NEBOSH CC Fire Prevention in Construction 1

Question 1

What are the three elements required to sustain a fire (the fire triangle)?

Accepted Answer

Fuel, oxygen and heat (ignition source)

Answer

The fire triangle represents the three essential elements needed to start and sustain a fire: fuel (combustible material), oxygen (from the air or oxidising agent) and heat (ignition source). Removing any one element will extinguish the fire.

Question 2

Which regulation requires duty holders to carry out a fire risk assessment for workplaces including construction sites?

Accepted Answer

Regulatory Reform (Fire Safety) Order 2005

Answer

The Regulatory Reform (Fire Safety) Order 2005 (FSO) requires the 'responsible person' for non-domestic premises (including construction sites) to carry out and review a fire risk assessment and implement appropriate fire precautions.

Question 3

What class of fire involves combustible materials such as wood, paper, textiles and construction materials?

Accepted Answer

Class A

Answer

Class A fires involve solid combustible materials such as wood, paper, textiles, and most building materials. These are the most common fire type on construction sites and are effectively extinguished using water or foam.

Question 4

What type of fire extinguisher is suitable for Class A fires involving wood and other solid combustibles?

Accepted Answer

Water or foam extinguisher

Answer

Water extinguishers cool burning material by absorbing heat, and foam extinguishers smother the fire and cool the fuel. Both are suitable for Class A fires involving solid combustibles such as wood and paper.

Question 5

What is the primary fire hazard associated with hot work on construction sites?

Accepted Answer

Sparks and molten metal from welding, cutting or grinding igniting nearby combustible materials

Answer

Hot work (welding, cutting, grinding and brazing) produces sparks and molten metal droplets that can travel considerable distances and ignite combustible materials including timber, insulation, flammable liquids and vapours in the vicinity.

NEBOSH Construction Certificate Practice Test

NEBOSH Construction Certificate Practice Test

NEBOSH CC Fire Prevention in Construction 1