Incident Investigation and Corrective Action practice questions for the CHST exam

CHST5 Domain 2: Emergency Preparedness, Incident Investigation, and Response (K2.5 Incident investigation; S2.4 Investigate incidents). 2 free questions below. Every answer quotes and links the regulation paragraph it rests on.

Regulations covered

Text pulled from the eCFR, current as of 2026-10-14.

Question 1

A general contractor's safety manager is building a dashboard to track whether the company's incident investigation process is working across several projects. She wants one metric that shows how well the company follows through after an incident or a hazard finding. Which metric best fits that purpose?

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Answer: D. Timely completion of corrective actions after a job site hazard is identified or an incident occurs

The guidance lists timely completion of corrective actions after a hazard is identified or an incident occurs as an indicator of progress, which directly measures follow-through on investigations. The other metrics are unrelated to the performance of the incident-response and corrective-action process.

“Timely completion of corrective actions after a job site hazard is identified or an incident occurs”
Question 2

After a near-miss in which a worker was almost struck by a swinging load, a contractor installed a new engineering control: a barricaded swing-radius exclusion zone with a spotter. Two weeks later, the safety technician finds that the barricade stays up but workers routinely step inside it when the spotter is busy. The employer wants to know what to do about the control. Which action best fits the recommended practices for evaluating controls?

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Answer: C. Evaluate the control with worker involvement, and because it is not effective in practice, identify, select, and implement further control measures

The guidance says to evaluate controls with worker involvement and, if they are not effective, to identify, select, and implement further measures that provide adequate protection. Treating a control as effective merely because it was installed ignores the evidence that it is not working, and removing it would leave workers with less protection.

“Evaluate control measures to determine if they are effective or need to be modified. Involve workers in the evaluation of the controls. If controls are not effective, identify, select, and implement further control measures that will provide adequate protection.”
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Original practice questions, not real exam items. PassCited is not affiliated with or endorsed by BCSP.