CHST CHST - Construction Health and Safety Technician Electrical Safety and LOTO Questions and Answers 4

Question 1

A GFCI trips repeatedly when a power tool is plugged in on a construction site. What is the safest immediate action?

Accepted Answer

Remove the tool from service and have it inspected/repaired

Answer

Repeated GFCI tripping indicates a ground fault in the tool; it must be removed from service and inspected by a qualified person before further use.

Question 2

What is the correct sequence for re-energizing equipment after LOTO maintenance is complete?

Accepted Answer

Inspect work area → notify affected employees → remove each worker's lock → re-energize

Answer

The proper sequence is: ensure all tools/workers are clear, notify affected employees, have each authorized worker remove their own lock, then restore energy.

Question 3

Which condition makes using tagout instead of lockout acceptable under 29 CFR 1910.147?

Accepted Answer

The energy-isolating device is not capable of being locked out and the employer can demonstrate equal protection

Answer

Tagout alone is permitted only when the energy-isolating device cannot physically accept a lock AND the employer provides equivalent protection through additional means.

Question 4

Under OSHA 29 CFR 1926.403, what is the maximum allowable voltage for flexible cords used with portable tools on construction sites without additional overcurrent protection?

Accepted Answer

The standard does not set a voltage limit for flexible cords

Answer

OSHA 1926.403 addresses conductor use and protection requirements but does not set a specific voltage ceiling for flexible cords; insulation and rating requirements apply based on application.

Question 5

An electrical arc flash incident on a construction site results in second-degree burns to a worker wearing standard work clothes. Which NFPA 70E concept was most likely neglected?

Accepted Answer

Arc flash hazard analysis and appropriate arc-rated PPE selection

Answer

Arc-rated PPE matched to the incident energy level from a site-specific arc flash hazard analysis would have reduced burn severity even when arc flash occurs.

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 4