CITB Specialists Confined Spaces & Noise

Question 1

How is a 'confined space' defined under the Confined Spaces Regulations 1997?

Accepted Answer

A place which is substantially enclosed and where there is a reasonably foreseeable risk of serious injury from hazardous substances or conditions

Answer

Any space less than 2 metres in any dimension

Answer

Any underground space on a construction site

Answer

Any space requiring special access equipment to enter

Question 2

What is the first principle of working in confined spaces?

Accepted Answer

Avoid entry if possible — find an alternative method to do the work without entering

Answer

Always send the smallest person in first

Answer

Enter quickly to reduce exposure time

Answer

Use the longest available lanyard

Question 3

What atmospheric tests must be carried out before entry to a confined space?

Accepted Answer

Oxygen level, flammable gases, and toxic gases (especially carbon monoxide and hydrogen sulphide)

Answer

Temperature and humidity only

Answer

Carbon dioxide level only

Answer

Light levels and noise only

Question 4

What does 'stand-by person' mean in confined space operations?

Accepted Answer

A person stationed outside the confined space to raise the alarm and initiate rescue if the entrant is in difficulty

Answer

A person inside the confined space as a buddy

Answer

A person on standby to take over work when the entrant tires

Answer

A supervisor monitoring from the site office

Question 5

Why should a rescuer never enter a confined space without proper equipment when a colleague collapses inside?

Accepted Answer

The same atmosphere that overcome the original entrant will incapacitate the rescuer, making the situation worse

Answer

Rescuers are not trained for confined space work

Answer

The regulation prohibits any unplanned entry

Answer

Only fire service personnel may enter after a collapse

Question 6

At what level is oxygen concentration considered dangerously deficient?

Accepted Answer

Below 19.5%

Answer

Below 18%

Answer

Below 15%

Answer

Below 10%