Confined Space Training Certificate Risk Assessment and Safe Systems — Questions and Answers
Question 1: Under the Confined Spaces Regulations 1997 and the Management of Health and Safety at Work Regulations 1999, a risk assessment for confined space work must be:
- Completed verbally and remembered by the supervisor
- Suitable and sufficient, identifying the risks and the precautions needed (Correct answer)
- Carried out only if the space has been involved in a previous incident
- Completed once and never reviewed unless legislation changes
Correct answer: Suitable and sufficient, identifying the risks and the precautions needed
The risk assessment must be 'suitable and sufficient' — it must identify the specific hazards present, assess the risks to anyone who may be affected, and determine the precautions required. It should be recorded, communicated to those involved, and reviewed whenever circumstances change.
Question 2: A safe system of work for confined space entry should include which of the following elements?
- Only the names of the workers entering the space
- Supervision, competence, communication, testing, gas monitoring, emergency arrangements, and permits to work (Correct answer)
- A verbal briefing with no written documentation
- Equipment lists only, with no reference to procedures
Correct answer: Supervision, competence, communication, testing, gas monitoring, emergency arrangements, and permits to work
A safe system of work for confined space entry is comprehensive and includes: adequate supervision, ensuring worker competence, effective communication, atmospheric testing and monitoring, emergency and rescue arrangements, and where appropriate, a permit-to-work system. All elements must work together.
Question 3: A permit-to-work system for confined space entry serves primarily to:
- Replace the need for a risk assessment
- Provide a formal documented check that all safety precautions are in place before work begins (Correct answer)
- Allow workers to enter without supervision
- Satisfy insurance requirements only
Correct answer: Provide a formal documented check that all safety precautions are in place before work begins
A permit-to-work is a formal, documented procedure that ensures all necessary safety precautions have been identified and implemented before entry begins. It acts as a final check, records who is in the space, specifies the work allowed, and sets time limits and conditions for the work.
Question 4: Who should be designated as the 'top man' or attendant during confined space entry?
- Any available worker who is not busy
- A competent person stationed at the entry point who maintains communication and can raise the alarm (Correct answer)
- The most senior manager on site
- A person inside the confined space watching the others work
Correct answer: A competent person stationed at the entry point who maintains communication and can raise the alarm
The attendant (or 'top man') must be a competent person stationed at or near the entry point. Their role is to maintain continuous communication with those inside, monitor conditions, control access, and initiate emergency procedures if required. They must never enter the space to attempt a rescue.
Question 5: When assessing the risks of a confined space, which of the following should be considered regarding the work activity itself?
- Only the hazards that existed before any work began
- Hazards that may be introduced by the work being carried out, such as welding fumes, dust, or heat (Correct answer)
- Only hazards that have caused injuries in the past 12 months
- Only chemical hazards, not physical ones
Correct answer: Hazards that may be introduced by the work being carried out, such as welding fumes, dust, or heat
The risk assessment must consider hazards introduced by the work activity as well as those inherent to the space. Welding generates fumes and consumes oxygen, grinding creates sparks and dust, painting introduces solvent vapours — all of which can create or worsen atmospheric hazards in a confined space.
Question 6: The risk assessment for confined space work identifies that toxic residues may be present in a vessel. The hierarchy of control would require the employer to first consider:
- Issuing respiratory protective equipment immediately
- Eliminating the hazard by removing the residues or avoiding entry altogether (Correct answer)
- Posting warning signs on the vessel
- Allowing entry for a maximum of 30 minutes
Correct answer: Eliminating the hazard by removing the residues or avoiding entry altogether
The hierarchy of control requires elimination of the hazard as the first consideration. This could mean removing the toxic residues (by cleaning or purging the vessel) or avoiding entry. Only if elimination is not reasonably practicable should the employer move to lower-level controls such as engineering controls, safe systems of work, and PPE.
Confined Space Training Certificate Risk Assessment and Safe Systems
Under the Confined Spaces Regulations 1997 and the Management of Health and Safety at Work Regulations 1999, a risk assessment for confined space work must be: