Confined Space Entry

3. Is the process by which a confined space is removed from service and completely protected from the release of energy and material into the space.
5. Is verifying whether an gas instrument is functioning properly and giving the correct readout within the limits specified by the manufacturer of the span gas.
7. Is any condition that poses an immediate threat to life or that would cause irreversible adverse health effects or that would interfere with an individual's ability to escape unaided from a confined space.
9. The individual stationed outside a confined space to monitor and protect the entrants.
10. Is the action by which a person passes through an opening into a confined space.
12. Is the maximum concentration of vapour or gas in air above which propagation of flame does not occur on contact with a source of ignition.
13. Is the displacement of the atmosphere in a confined space by a noncombustible gas (such as nitrogen) to such an extent that the resulting atmosphere is noncombustible.

1. Is the person responsible for determining whether acceptable entry conditions exist, for authorizing entry, overseeing entry operations, and for terminating entry.
2. Is the process of installing a lock on an energy-isolating device such as a circuit breaker, disconnect switch, or shut-off valve that prevents the device from being operated
4. Is a method of closing off a pipe by installing a solid cap or plate so that the pipe's bore is completely covered.
6. Refers to concentrations of airborne toxic materials that have been averaged over an eight-hour working day.
8. Is the surrounding and effective capture of a person by a liquid or finely divided (flowable) solid substance that can be aspirated to cause death by filling or plugging the respiratory system or that can exert enough force on the body to cause death by strangulation, constriction, or crushing.
11. Is diluting the concentration of the contaminant before it reaches the worker's breathing zone by mixing with uncontaminated air.