CITB Fire Safety 2

Question 1

Which class of fire involves burning metals such as magnesium or titanium?

Accepted Answer

Class D

Answer

Class D fires involve combustible metals; they require specialist dry powder extinguishers — water and CO2 can react dangerously with burning metals.

Question 2

What is a hot works permit and when is it required on a construction site?

Accepted Answer

A formal written control authorising work that generates heat or sparks, specifying fire watches and precautions

Answer

A hot works permit is issued before any heat-generating operation begins; it specifies the work area, duration, precautions, and a post-work fire watch period.

Question 3

What is the minimum post-work fire watch period recommended after hot works finish?

Accepted Answer

60 minutes

Answer

The standard recommendation is a 60-minute fire watch after hot works end, because smouldering materials can ignite into full fires long after the work has finished.

Question 4

Which class of fire is caused by flammable liquids such as petrol or diesel?

Accepted Answer

Class B

Answer

Class B fires involve flammable liquids and liquefiable solids such as petrol, diesel, and paint thinners, fought with foam, CO2, or dry powder extinguishers.

Question 5

In the event of a fire on a construction site, what is the correct immediate action for an operative?

Accepted Answer

Raise the alarm, evacuate the area, and report to the assembly point without re-entering until authorised

Answer

The priority is life safety — raise the alarm, evacuate everyone, and muster at the assembly point; only trained staff with appropriate extinguishers should attempt to fight small, contained fires.

CITB HS&E Operatives Practice Test

CITB HS&E Operatives Practice Test

CITB Fire Safety 2