CHST Electrical Safety and LOTO 3

Question 1

When multiple workers are performing LOTO on the same equipment, what device allows each authorized employee to apply their own personal lock?

Accepted Answer

A hasp (multi-hole lockout device)

Answer

A single master lock shared by supervisors

Answer

A tagout-only system when more than 5 workers are involved

Answer

A lock box system with one key

Question 2

Under OSHA's LOTO standard 1910.147, what must be done if a piece of equipment cannot be locked out because it has no provision for a lock?

Accepted Answer

A tagout device must be used along with additional safety measures to provide protection equivalent to lockout

Answer

The work cannot proceed until the equipment is retrofitted with a hasp

Answer

Verbal notification to affected workers is sufficient

Answer

A supervisor must be present at all times during the work

Question 3

What is the correct final step to verify zero energy state before beginning work under a LOTO procedure?

Accepted Answer

Attempt to operate the equipment using normal operating controls to confirm it will not start

Answer

Visually confirm the lockout device is in place

Answer

Ask a coworker to confirm the energy source is isolated

Answer

Review the written energy control procedure

Question 4

Under OSHA 1910.147, what is required before an authorized employee may restore energy to equipment after LOTO servicing is complete?

Accepted Answer

All tools and materials removed, all workers clear of the machine, and all LOTO devices removed by the employees who applied them before the energy-isolating device is operated

Answer

The supervisor removes the lockout device on behalf of the crew

Answer

One authorized employee removes all locks and notifies the others

Answer

The safety officer certifies the repair is complete in writing

Question 5

Under OSHA 1926.403, electrical equipment must be installed and used in accordance with which national standard to meet the design requirements for construction sites?

Accepted Answer

The National Electrical Code (NEC), NFPA 70

Answer

ANSI Z87.1

Answer

NFPA 101 Life Safety Code

Answer

ASME B30.9

Question 6

Under the hierarchy of controls for electrical hazards, what is the preferred method before any other control when working near energized electrical equipment?

Accepted Answer

Establish an Electrically Safe Work Condition (ESWC) by de-energizing and locking out the equipment

Answer

Wear arc flash PPE rated for the maximum incident energy

Answer

Use double-insulated tools to reduce shock risk

Answer

Post warning signs and barriers around the energized equipment