CHST CHST - Construction Health and Safety Technician Electrical Safety and LOTO Questions and Answers 3

Question 1

An employee discovers that a lockout device has been removed without proper authorization. What should a CHST recommend as the immediate action?

Accepted Answer

Re-apply lockout, stop work, and investigate the unauthorized removal

Answer

Continue work if the equipment appears de-energized

Answer

File a report at end of shift

Answer

Notify the equipment manufacturer

Question 2

Per OSHA 1926 Subpart K, which of the following is an acceptable method to protect employees from electrical hazards in wet locations on a construction site?

Accepted Answer

Providing GFCI protection on all 120-volt, 15- and 20-ampere circuits

Answer

Using double-insulated tools without any additional protection

Answer

Posting warning signs near puddles

Answer

Wearing leather gloves

Question 3

What is the primary purpose of a 'try-out' procedure during lockout/tagout?

Accepted Answer

To verify that the energy isolation is effective and the equipment cannot be restarted

Answer

To test whether the locks are strong enough to withstand force

Answer

To check if the equipment needs maintenance beyond the current scope

Answer

To ensure all workers have signed the permit

Question 4

Which of the following scenarios would require an arc flash hazard analysis per NFPA 70E on a construction site?

Accepted Answer

Working on energized electrical equipment operating at 50 volts or more

Answer

Replacing a light bulb in a de-energized fixture

Answer

Inspecting a locked-out panel with the cover removed

Answer

Painting an electrical room wall

Question 5

A group lockout/tagout procedure is being used on a construction project. What is the primary responsibility of the authorized employee in charge?

Accepted Answer

Ensuring that all members of the group are protected throughout the lockout and coordinating the application and removal of lockout devices

Answer

Purchasing the correct locks for the crew

Answer

Training new employees on general site safety

Answer

Scheduling the maintenance window with the client

Question 6

What is the OSHA-required voltage threshold below which electrical work is generally considered low-voltage on construction sites?

Accepted Answer

50 volts

Answer

24 volts

Answer

120 volts

Answer

240 volts