CITB Specialists Confined Space Operations

Question 1

Under the Confined Spaces Regulations 1997, what is the first principle a specialist supervisor must apply before allowing entry into a confined space?

Accepted Answer

Avoid entry to the confined space wherever reasonably practicable

Answer

Ensure all workers have RPE available

Answer

Brief the rescue team on standby procedures

Answer

Test the atmosphere and proceed if safe

Question 2

What minimum oxygen level in a confined space would require the use of breathing apparatus before a specialist operative can enter?

Accepted Answer

Below 19.5%

Answer

Below 21%

Answer

Below 17%

Answer

Below 15%

Question 3

A specialist team is about to enter a sewer for maintenance work. Which of the following gases poses the greatest immediate risk of explosion?

Accepted Answer

Methane

Answer

Carbon dioxide

Answer

Hydrogen sulphide

Answer

Nitrogen

Question 4

How often must continuous atmospheric monitoring be maintained during specialist work inside a confined space?

Accepted Answer

Continuously throughout the entire period of occupation

Answer

Every 30 minutes

Answer

Only at the point of entry

Answer

At the start and end of each shift

Question 5

What is the primary role of the 'top man' (attendant) stationed outside a confined space during specialist operations?

Accepted Answer

To maintain communication with entrants and initiate emergency rescue procedures if needed

Answer

To operate the ventilation equipment

Answer

To complete the confined space entry permit

Answer

To supervise other works happening nearby

Question 6

A specialist supervisor discovers that the confined space entry permit has expired but workers are still inside completing their task. What is the correct action?

Accepted Answer

Withdraw all personnel immediately and re-assess before issuing a new permit

Answer

Allow them to finish as they are nearly done

Answer

Extend the permit verbally over the radio

Answer

Ask the workers inside to sign a waiver