CHST CHST - Construction Health and Safety Technician Electrical Safety and LOTO Questions and Answers 2

Question 1

Under OSHA's lockout/tagout standard (29 CFR 1910.147), which of the following is required before servicing equipment that has multiple energy sources?

Accepted Answer

All energy sources must be identified and each one individually locked out

Answer

Only the primary energy source must be locked out

Answer

A single lock on the main disconnect is sufficient

Answer

Tagout alone is acceptable for all energy sources

Question 2

What is the minimum approach distance for an unqualified worker near exposed energized parts operating at 50 kV on a construction site per OSHA 1926 Subpart K?

Accepted Answer

10 feet

Answer

5 feet

Answer

15 feet

Answer

20 feet

Question 3

During a lockout/tagout procedure, who is authorized to remove a lock placed by another worker?

Accepted Answer

Only the worker who applied the lock, with limited exceptions under employer procedures

Answer

The site superintendent

Answer

Any qualified electrician on the crew

Answer

The general contractor's safety manager

Question 4

A CHST observes a worker using a portable electric tool on a construction site without a GFCI. Which OSHA standard is being violated?

Accepted Answer

29 CFR 1926.404(b)(1)

Answer

29 CFR 1910.333(a)

Answer

29 CFR 1926.502(d)

Answer

29 CFR 1910.147(c)(1)

Question 5

What does the term 'zero energy state' mean in the context of lockout/tagout?

Accepted Answer

All stored and residual energy has been relieved, disconnected, or restrained so the equipment cannot operate

Answer

The equipment is running at its lowest power setting

Answer

The circuit breaker is in the off position but not locked

Answer

The equipment has been unplugged but capacitors may still hold a charge

Question 6

Which color is OSHA-recommended for danger tags used in a tagout procedure?

Accepted Answer

Red

Answer

Yellow

Answer

Orange

Answer

Blue