Isolation and Lockout/Tagout Procedures Flashcards

What is the correct sequence for applying a lockout/tagout procedure before confined space entry?

Answer: Shut down equipment, isolate energy source, dissipate stored energy, apply lock and tag, verify isolation

The correct sequence ensures the equipment is safely shut down, all energy is isolated and residual energy dissipated, before locks and tags are applied and isolation is verified.

A danger tag attached to an isolation point in a confined space entry situation means:

Answer: The equipment must not be operated or the isolation removed

A danger tag is a warning device that must not be removed or bypassed; it indicates the equipment or isolation must not be disturbed while the tag is in place.

Why must stored energy (such as pressure, gravity or capacitive charge) be dissipated as part of isolation procedures?

Answer: Because stored energy can be released unexpectedly even after the power source is isolated

Even after isolation, stored energy such as compressed air, hydraulic pressure or electrical charge can be released, causing serious injury unless it is safely dissipated.

In a confined space with multiple energy sources (electrical, hydraulic and pneumatic), which statement about isolation is correct?

Answer: Each energy source must be individually identified and isolated

Each energy source must be individually identified, isolated and locked out because residual energy in hydraulic or pneumatic systems can cause harm even when electrical power is removed.

Who is responsible for ensuring all isolation points are identified and documented on the confined space entry permit?

Answer: The entry team leader or authorised person issuing the permit

The authorised person issuing the entry permit is responsible for identifying all energy sources, documenting isolation points, and ensuring isolations are in place before authorising entry.

What action should a worker take if they discover that an isolation lock has been removed without authorisation while they are still inside a confined space?

Answer: Exit the confined space immediately and raise the alarm

An unauthorised removal of an isolation lock creates an immediate risk of energy being restored; all workers must exit the confined space immediately and the incident reported.

The purpose of a group lockout hasp in confined space isolation is to:

Answer: Enable multiple workers to each apply their own personal lock to a single isolation point

A group lockout hasp has multiple holes allowing each member of the entry team to attach their own personal lock, ensuring the isolation cannot be removed while any individual's lock remains in place.