NEBOSH CC Fire Prevention in Construction 3

Question 1

What type of fire is associated with flammable liquids and gases on a construction site?

Accepted Answer

Class B (flammable liquids) and Class C (flammable gases)

Answer

Class B fires involve flammable liquids such as petrol, diesel, solvents and adhesives. Class C fires involve flammable gases such as LPG, acetylene and natural gas. Both are common on construction sites due to the use of fuels and bottled gases.

Question 2

Which type of fire extinguisher must NOT be used on electrical fires?

Accepted Answer

Water extinguisher

Answer

Water extinguishers conduct electricity and must never be used on live electrical equipment. Using a water extinguisher on an electrical fire risks electrocuting the person operating the extinguisher.

Question 3

What is the meaning of a continuous fire alarm signal on a construction site?

Accepted Answer

Evacuate immediately via the designated escape routes to the fire assembly point

Answer

A continuous fire alarm signal means evacuate immediately. Workers must leave the site using designated escape routes and go directly to the fire assembly point. No work should continue until the all-clear is given by the responsible person.

Question 4

What precautions should be taken when storing flammable liquids on a construction site?

Accepted Answer

Store in a dedicated, ventilated, fire-resisting store away from ignition sources and in quantities no more than necessary

Answer

Flammable liquids must be stored in a designated fire-resisting store (or metal cabinet), kept well ventilated to prevent vapour build-up, away from ignition sources, and in the minimum quantity needed. Containers must be kept closed when not in use.

Question 5

What is the fire risk associated with polyurethane foam insulation boards on a construction site?

Accepted Answer

They are highly combustible and produce toxic smoke when burning, spreading fire rapidly

Answer

Polyurethane foam insulation boards are highly combustible and produce large quantities of dense, toxic smoke when burning. They can contribute to rapid fire spread and have been involved in serious construction site fires. Storage and use must be carefully managed.

NEBOSH Construction Certificate Practice Test

NEBOSH Construction Certificate Practice Test

NEBOSH CC Fire Prevention in Construction 3