Question 1

According to OSHA 29 CFR 1910.333, what is the minimum approach distance an unqualified worker must maintain from exposed energized parts operating at 50 volts or more?

Accepted Answer

An unqualified worker must stay outside the Limited Approach Boundary, which requires they not cross into the space where there is an increased risk of shock. They must remain at a distance that prevents inadvertent contact, as specified by the employer's Energized Electrical Work Permit.

Question 2

Under OSHA standards, at what voltage level do electrical hazards become regulated and require protective measures for workers?

Accepted Answer

OSHA regulations for electrical safety begin at 50 volts. Below 50 volts, the risk of harmful electric shock is generally considered negligible under normal conditions.

Question 3

What does OSHA 29 CFR 1910.147 govern, and what is its common name?

Accepted Answer

OSHA 29 CFR 1910.147 governs the control of hazardous energy during servicing and maintenance of machines and equipment. It is commonly known as the Lockout/Tagout (LOTO) standard.

Question 4

What is the correct sequence of the six steps in a Lockout/Tagout procedure?

Accepted Answer

The six steps are: (1) Notify affected employees, (2) Identify all energy sources, (3) Shut down the equipment, (4) Isolate all energy sources, (5) Apply lockout/tagout devices, and (6) Release or restrain stored energy, then verify zero energy state.

Question 5

What is the key difference between a lockout device and a tagout device?

Accepted Answer

A lockout device physically prevents the operation of an energy-isolating device using a lock. A tagout device is only a warning label that does not physically prevent re-energization, making lockout the preferred and more secure method.

Electrical Safety – Electrician Journeyman Exam

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