Confined Space Training Certificate PPE and Breathing Apparatus

Question 1

In the hierarchy of control measures for confined space hazards, personal protective equipment (PPE) is considered:

Accepted Answer

The last resort, to be used only when higher-level controls cannot adequately reduce the risk

Answer

PPE is at the bottom of the hierarchy of control because it relies entirely on the wearer using it correctly. Higher-level controls (elimination, substitution, engineering controls, administrative controls) are preferred because they reduce or remove the hazard at source. PPE should only be used to manage residual risk after other measures are in place.

Question 2

A filtering respirator (such as a half-face mask with cartridges) should NOT be used in a confined space when:

Accepted Answer

The atmosphere is or may become oxygen-deficient or contain concentrations of gas immediately dangerous to life

Answer

Filtering respirators work by cleaning the ambient air — they do not supply oxygen. If the atmosphere is oxygen-deficient (below 19.5%) or contains IDLH concentrations of toxic gas, a filter cannot provide safe breathable air. In these conditions, supplied-air breathing apparatus (airline or SCBA) must be used instead.

Question 3

Face-fit testing for respiratory protective equipment (RPE) is required to:

Accepted Answer

Ensure the facepiece forms an adequate seal against the wearer's face, preventing contaminant leakage

Answer

Face-fit testing confirms that a specific make, model, and size of tight-fitting facepiece achieves an adequate seal on the individual wearer's face. Without proper fit, contaminated air leaks around the seal, significantly reducing the protection provided. Testing must be repeated when the wearer's facial features change.

Question 4

Self-contained breathing apparatus (SCBA) used in confined spaces typically provides an air supply lasting:

Accepted Answer

Approximately 20-45 minutes depending on the wearer's breathing rate and cylinder size

Answer

Standard SCBA cylinders used in industrial confined space work typically provide 20-45 minutes of air, though this varies with cylinder size, working pressure, and the wearer's breathing rate. Physical exertion in rescue situations significantly increases air consumption. Duration must be factored into the safe system of work and rescue planning.

Question 5

An airline breathing apparatus (compressed air line) for confined space work must have:

Accepted Answer

A supply of breathing-quality air that meets BS EN 12021, with an escape cylinder in case the airline fails

Answer

Airline breathing apparatus must be supplied with air that meets the breathing air standard BS EN 12021, which specifies limits on contaminants such as carbon monoxide, carbon dioxide, oil mist, and water. The air source must be positioned in clean air, and the user must carry an escape cylinder providing enough air to exit safely if the airline is damaged.

Confined Space Practice Test

Confined Space Practice Test

Confined Space Training Certificate PPE and Breathing Apparatus