Free OHST Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

15 × 6 = 90 units

So, the correct answer is C.

OHST professionals use such calculations for workload analysis and planning safe production levels.

Comprehensive and Detailed Explanation:

The correct answer is B.

Engineering controls physically separate workers from hazards using barriers, enclosures, ventilation systems, or automation.

These controls are highly effective because they reduce reliance on human behavior and provide continuous protection.

OHST professionals prioritize engineering controls when developing risk reduction strategies.

Comprehensive and Detailed Explanation:

1,200 ÷ 15 = 80 units per hour

So, the correct answer is C.

OHST professionals use production rate calculations to evaluate workload intensity and potential safety risks associated with high-speed operations.

Comprehensive and Detailed Explanation:

Personal protective equipment (PPE) is generally considered the least effective control because it depends heavily on proper selection, fit, maintenance, and employee compliance. Therefore, D is correct.

The hierarchy of controls ranks methods according to their effectiveness in reducing risk. Elimination and substitution address hazards at their source. Engineering controls physically isolate workers from hazards. Administrative controls modify work practices and procedures. PPE serves as the final line of defense.

OHST professionals should prioritize higher-level controls whenever feasible. While PPE plays an important role in many workplaces, it should not be the sole control when more effective options are available. Examples include respirators, gloves, safety glasses, hearing protection, and protective footwear.

Understanding the hierarchy of controls helps safety practitioners develop effective risk reduction strategies and improve long-term workplace safety outcomes.

Comprehensive and Detailed Explanation:

The correct answer is B.

Safety behavior is best reinforced through continuous training, refresher sessions, and ongoing communication. Repetition helps employees retain knowledge and apply safe practices consistently.

Workplace hazards and procedures may change over time, making ongoing training essential. Regular reinforcement ensures employees remain aware of risks and follow updated procedures.

OHST professionals support continuous training programs to strengthen safety culture and reduce incidents. Toolbox talks, refresher courses, and coaching are common methods used for reinforcement.

Sustained communication is key to long-term safety performance improvement.