Free OHST Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

The correct answer is D.

Personal Protective Equipment (PPE) is considered the least effective control because it depends on proper use, maintenance, and compliance by workers.

While PPE is important, it does not remove the hazard and is used as a last line of defense when higher-level controls are not feasible.

OHST professionals prioritize elimination, substitution, and engineering controls before relying on PPE.

Comprehensive and Detailed Explanation:

The correct answer is C.

Incident investigation is a reactive safety measure because it occurs after an incident has already happened. Its purpose is to determine causes and prevent recurrence.

OHST professionals use investigation findings to improve systems and implement corrective actions. While reactive measures are important, they should be complemented with proactive strategies.

Comprehensive and Detailed Explanation:

The correct answer is B.

A fire evacuation plan provides structured procedures for safely evacuating occupants during fire emergencies.

OHST professionals ensure these plans include escape routes, assembly points, and responsibilities to minimize panic and injuries.

Comprehensive and Detailed Explanation:

The correct answer is B.

Emergency drills test how well employees and systems respond during simulated emergencies. They help identify weaknesses in evacuation procedures, communication systems, and emergency preparedness plans.

OHST professionals use drill results to improve training, update procedures, and strengthen emergency response capabilities.

Regular practice ensures employees know how to react quickly and safely during real emergencies, reducing confusion and risk.

Comprehensive and Detailed Explanation:

The correct answer is C.

Administrative controls reduce exposure to hazards by changing how work is performed. Job rotation is an example, where workers alternate tasks to reduce repetitive strain or exposure time.

OHST professionals use administrative controls when elimination or engineering controls are not feasible. However, they depend on human behavior, making them less reliable than engineering solutions.