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

OSHA requires that all energy sources, including electrical, hydraulic, pneumatic, and stored energy, be identified and individually locked out before servicing.

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

OSHA 1926.416 requires unqualified workers to maintain at least 10 feet from exposed energized conductors or parts rated up to 50 kV.

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

OSHA requires that only the employee who applied the lock may remove it, except under specific documented employer procedures when that worker is unavailable.

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

OSHA 1926.404(b)(1) requires ground-fault circuit interrupter protection or an assured equipment grounding conductor program for temporary wiring on construction sites.

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

Zero energy state means all forms of hazardous energy have been controlled so the equipment cannot unexpectedly start or release energy during servicing.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

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