CITB Specialists Fire Safety in Specialist Trades

Question 1

What is the most common cause of fire on UK construction sites?

Accepted Answer

Hot works (welding, cutting, grinding, and blowtorch use)

Answer

Arson by intruders

Answer

Spontaneous combustion of waste materials

Answer

Electrical faults in temporary supplies

Question 2

What is a Hot Work Permit and who issues it?

Accepted Answer

A document authorising hot work at specific locations for a defined time, issued by the site manager or fire safety coordinator

Answer

A licence from the fire brigade to conduct hot works

Answer

A permit issued by the equipment manufacturer

Answer

An insurance document for welding operations

Question 3

How long should a fire watch be maintained after hot work is completed?

Accepted Answer

At least 60 minutes after hot work ceases, with a further check after returning later in the day

Answer

5 minutes only

Answer

Until the work area has cooled to room temperature — usually 10 minutes

Answer

No fire watch is needed if water is available nearby

Question 4

What fire extinguisher is appropriate for an electrical fire?

Accepted Answer

CO2 (carbon dioxide) extinguisher

Answer

Water extinguisher

Answer

Foam extinguisher

Answer

Powder extinguisher unless no other is available

Question 5

What is a Class F fire and which specialist trade must consider it?

Accepted Answer

A fire involving cooking oils and fats — relevant to catering equipment installers

Answer

A fire involving flammable gases

Answer

A fire involving metals

Answer

A fire involving electrical equipment

Question 6

When must a fire risk assessment be updated on a construction site?

Accepted Answer

When significant changes occur to the site, materials used, or work activities — and at regular intervals

Answer

Only annually

Answer

Only after a fire incident

Answer

Only when the site boundary changes