BCSP Occupational Hygiene and Safety Technician Examination Practice Test
The OHST practice page focuses on occupational hygiene and safety tasks that technicians may encounter in workplaces. Its question bank samples exposure assessment, physical and chemical hazards, personal protective equipment, and practical controls. Scenarios include interpreting an 8-hour time-weighted average, selecting a suitable instrument for measuring task lighting, and recognizing conditions that affect respirator fit.
Exam overview
About the BCSP Occupational Hygiene and Safety Technician Examination Exam
Technician-level judgment often involves connecting a workplace condition to a suitable measurement, control, or protective measure. The practice questions use concepts such as the hierarchy of controls, exposure limits, secondary containment, and polarized light microscopy for asbestos-containing materials. Other scenarios address heat and cold stress, ergonomic pressure from kneeling, and eye protection against particles approaching from the sides. These examples call for distinguishing engineering, administrative, and personal protective measures; understanding what an instrument or laboratory method can establish; and identifying the hazard a control is intended to reduce. They can help you check whether you can interpret exposure information and apply occupational hygiene and safety concepts to specific work conditions.
Sample Practice Questions
Review a selection from this exam's published US Practice Tests practice bank.
A technician is reviewing a proposed control for a hazardous process. Which option generally follows the hierarchy of controls most effectively when feasible?
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Correct answer: CSubstitution reduces the hazard at its source and is generally preferred over administrative measures and personal protective equipment, provided the substitute does not introduce greater risks.
A technician observes an employee working in a hot environment and wants to reduce heat strain. Which measure is an appropriate administrative control?
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Correct answer: APlanned rest breaks in a cooler area allow recovery and are a common administrative approach to reducing heat strain. Work-rest schedules should be appropriate to conditions and worker acclimatization.
A technician is interpreting a laboratory report for a bulk building material suspected of containing asbestos. What does polarized light microscopy primarily help determine?
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Correct answer: APolarized light microscopy is commonly used to identify asbestos types and estimate their proportion in bulk material. It does not directly measure a worker’s airborne exposure.
A worker must use a tight-fitting respirator for a task. Which condition is necessary for the respirator to provide its intended facepiece seal?
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Correct answer: AA tight-fitting respirator must fit the individual wearer, and fit testing is used to evaluate the seal for a particular make, model, style, and size. A new filter does not compensate for leakage at the facepiece.
A worker’s task involves repeated kneeling on a hard surface. Which control is most directly aimed at reducing localized pressure on the knees?
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Correct answer: AKnee pads or cushioning distribute pressure and reduce direct contact stress during kneeling. The other options do not address the localized pressure exposure.
A technician is asked to evaluate whether a workroom's lighting is adequate for a visually demanding task. Which instrument is most directly suited to measuring illuminance at the task surface?
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Correct answer: BA lux meter measures illuminance, the amount of light incident on a surface. A sound level meter measures sound, an anemometer measures air velocity, and a vibration meter measures vibration.
A worker uses a powered cutting tool that generates flying fragments. Which eye protection feature is most relevant to reducing injury from particles approaching from the sides?
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Correct answer: ASide protection helps guard against particles entering around the lens, and protective eyewear should be appropriate for the impact hazard. Ordinary glasses or tint alone do not establish adequate impact protection.
How to use this practice test
Access is free. A session draws up to 20 random questions from the 50-question OHST practice bank, so different sessions may sample different scenarios. Submit your responses to see results after the session, then use missed or uncertain items to identify concepts to revisit, such as exposure averaging, control selection, or measurement methods.
Preparation tips
- For exposure-limit questions, distinguish an 8-hour time-weighted average from a single measurement and consider how exposure duration affects the average.
- When choosing a control, compare elimination or substitution and engineering measures with administrative controls and PPE; identify which option most directly reduces the hazard.
- Review what polarized light microscopy can determine in bulk asbestos analysis, and distinguish material identification from airborne-fiber exposure measurement.
- Match instruments to the quantity being assessed: use an illuminance meter for light at a task surface, and check that sampling methods align with the exposure being evaluated.
- For respirator and ergonomic scenarios, connect fit-testing and facepiece-seal conditions to respiratory protection, and match kneeling pads to localized knee pressure.