Safety Procedures Flashcards

Under OSHA's lockout/tagout standard (29 CFR 1910.147), when three technicians service the same air handler, what is the correct lockout practice?

Answer: Each technician applies a personal lock, often using a group lockout hasp

Every authorized employee must have personal control of the energy isolation, so each one applies their own lock, usually on a multi-lock hasp.

After applying locks to an electrical disconnect, what step must come before work begins?

Answer: Verify zero energy by attempting to start the equipment or testing with a meter

Verifying isolation, such as a try-start or a live-dead-live meter test, confirms the hazardous energy is actually controlled.

How often does OSHA require a periodic inspection of energy control procedures?

Answer: At least annually

29 CFR 1910.147(c)(6) requires the employer to inspect energy control procedures at least once a year.

A maintenance worker has to enter a sewage ejector pit that could hold hydrogen sulfide. How does OSHA classify this space?

Answer: Permit-required confined space

A confined space with a potentially hazardous atmosphere meets the definition of a permit-required confined space under 29 CFR 1910.146.

What acceptable oxygen range does OSHA set for confined space entry?

Answer: 19.5% to 23.5%

OSHA treats air below 19.5% oxygen as deficient and above 23.5% as enriched.

In what order should a confined space atmosphere be tested before entry?

Answer: Oxygen, flammables, toxics

Oxygen comes first because many combustible gas sensors need enough oxygen to read accurately; flammables come next, then toxics.

Which role must remain outside a permit-required confined space for the whole entry?

Answer: Attendant

The attendant watches the entrants from outside and must never go in to attempt a rescue.