Occupational Hygiene Practice Test

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• Which statement correctly matches hazard class with its oral LD50 range?
• Which statistics are appropriate for describing lognormal exposure data?
• What does a Job-Exposure Matrix (JEM) help you do?
• A Job Task Analysis (JTA) should include which elements in exposure sequencing?
• The eyes and skin are the most susceptible to damage from lasers. Which statement is true?
• Pesticides have a high affinity to the cholinesterase enzyme in the human body. Which class is typically associated?
• What does STEL stand for?
• What is the exact definition of efficiency?
• Which statement best distinguishes acute vs chronic exposure?
• Which classification describes the chemical type or composition of pesticides?
• Name a standard method or guideline used for asbestos air sampling.
• What is a bioaerosol and provide an example.
• The Anffimov's test is used to measure concentration of attention.
• Distinguish active versus passive sampling in air monitoring.
• Which tones of hearing sensitivity are reduced to first by intense noise exposition
• Which factor is NOT typically included in the WBGT index as described?
• What is a fugitive emission and why is it important to monitor?
• Which of the following statements about visual fatigue indicators is true?
• What is the purpose of medical surveillance in occupational health programs?
• In sorbent sampling, what is sorbent breakthrough?
• What is the best way to protect an employee working at a noisy machine?
• Lead toxicity is influenced primarily by which factor?
• Do PPE requirements vary with pesticide toxicity?
• A herbicide is used to kill what type of pest?
• The Assigned Protection Factor (APF) is used to determine what in respirator selection?
• What is a Biological Exposure Index (BEI) and when is it used?
• What is the recommended statistical approach for describing lognormal data in terms of central tendency?
• Which statement best describes qualitative fit testing for respirators?
• Which option is NOT a major classification of pesticides?
• Which methods are commonly used to assess exposure to chemicals in occupational settings?
• Lead toxicity depends mainly on particle solubility but not on its size. Which statement is true?
• Which of the below best describes a hazard?
• What is a sampling plan decision rule?
• Heat and sunstroke are two identical concepts for a condition that can occur due to overheating microclimate.
• What is the primary purpose of QA/QC in analytical sampling and results interpretation?
• Which of the following steps does occupational risk assessment involve?
• Pneumoconiosis is caused by exposure to dust.
• Explain 'non-detect' and 'below the limit of quantitation' in sample results.
• Which statement about hearing loss is true?
• Pneumoconiosis are occupational diseases that occur after exposure to dust.
• Thermal injury to the retina is more common in short exposures to near infrared radiation.
• Hazard related to pesticide use varies with exposure. Which statement best describes this relationship?
• Which action is considered an engineering control to reduce hand-arm vibration exposure?
• Far infrared radiation may cause superficial burns to the cornea or skin. Which statement is true?
• Which physical parameters does the harmful effect of noise depend on
• Which statement best describes simple asphyxiants?
• Which statement correctly differentiates OSHA PELs from ACGIH TLVs?
• When does the over-fatigue occur
• Which statement about the scope of occupational hygiene is true?
• Which statement about reducing exposure to toxic substances is true?
• What factors influence respirator selection and cartridge type?
• Which ergonomic risk assessment tool is commonly used?
• How do ionizing and non-ionizing radiation hazards differ in workplace safety strategies?
• Tremometriya is a method for investigating
• What is Local Exhaust Ventilation (LEV) and when is it preferred?
• Which statement correctly describes the major sources of radio frequency radiation in occupational settings?
• Which single device is commonly used for direct-reading measurements of gases or vapors?
• According to the WHO, which statement best defines health-relevant noise?
• High air pollution levels can trigger which health conditions?
• Which term describes the buildup of chemicals in living organisms over time?
• NOAEL and LOAEL stand for which concepts?
• Two factors determine risk when dealing with chemical hazards.
• Which of the following is a key step in a risk-based occupational exposure assessment?
• Which device is most commonly used to measure sound pressure?
• Which statement about exposure routes is true in industry?
• If a sampling result is non-detect, what is a reasonable next step?
• Health effects due to static magnetic fields include visual effects. Which statement is true?
• What does WBGT stand for in heat stress assessment?
• Asphyxiant gases can be which type?
• Prevention of fatigue is provided through
• What are the core components of hazard communication in the workplace?
• A Time-Weighted Average (TWA) exposure is typically calculated over what period?
• Which statement best describes noise?
• What hazard do safety goggles protect against?
• Which statement about hazards is true?
• Which statement about occupational exposure to lead is incorrect?
• Hazard represents the potential for a substance to cause adverse effects. Which statement is true?
• Which tissue is most at risk from laser exposure?
• Microwave and communication frequencies are the major sources of radio frequency radiation.
• Pesticides from class '2 moderately hazardous' have LD50 for the rat (oral) in which range?
• Name two hazard analysis techniques used in occupational hygiene to identify process hazards.
• In a risk-based exposure assessment, which step involves estimating the relationship between exposure and health effects to guide controls?
• According to the contact between human body and vibrating source, vibrations are classified as which of the following?
• Fatigue is a physiological state which raises the risk of pathological changes in the organisms.
• Name two devices used for direct-reading measurements of gases or vapors.
• Calibration checks are performed to verify instrument accuracy and are conducted how often?
• Which of the following is a factor efficiency depends on?
• Name the hierarchy of controls from most to least effective.
• Calibration checks are performed to verify instrument accuracy and are conducted how often?
• What is impossible for gloves to protect against?
• Noise can be described as which of the following?
• In quantitative fit testing for respirators, which instrument is used to measure seal leakage?
• What is the Upper Confidence Limit (UCL) and how is it used in exposure assessment?
• Hand-arm vibration occurs where?
• What is the maximum mg/m^3 value used as the golden standard occupational exposure limit for carbon dioxide (CO2)?
• Define Assigned Protection Factor (APF) and its use in respirator selection.
• Which of the following steps does not form part of an occupational risk assessment?
• What is a key limitation of qualitative fit testing?
• LASER acronym stands for Light Amplification by Stimulated Emission of Radiation.
• Exposure data often follows a lognormal distribution. What do the geometric mean and geometric standard deviation describe, and why are they used?
• Cadmium is classified as which type of toxicant?
• Which of these production criteria can report the occurrence of fatigue ?
• Name two sorbent media commonly used in active air sampling for VOCs.
• Is the stability of clear vision an indicator of visual fatigue?
• Which statement accurately defines hazard and risk?
• How is Assigned Protection Factor (APF) used to determine respirator adequacy?
• Which statement about occupational vibration exposure is correct?
• Ear barotrauma can result from exposure to high air pressure.
• What is the purpose of Safety Data Sheets (SDS) in hazard communication?
• Indicate what efficiency depends on
• Which index is commonly used to assess heat stress and which variables does it include?
• Do the signs of over fatigue disappear after the daily rest ( dream )
• What is the primary purpose of a risk-based occupational exposure assessment?
• The critical target organ after long-term exposure to Cadmium.
• Hygiene in occupational health focuses on preventing work-related health problems.
• Ultraviolet radiation is the highest energy non-ionizing radiation.
• Which statement best differentiates OSHA PELs from ACGIH TLVs?
• The Anffimov test measures concentration of attention.
• Toxicity and hazard are synonyms. Which statement is true?
• Which classification describes how pesticides are applied in practice?
• Which of the following is a key factor in designing a sampling plan?
• What is the occupational exposure limit for noise relevant to prevention of hearing loss?
• The exposure to high-intensity noise has a negative influence on the cardiovascular system.
• Which classification describes the hazard potential of pesticides?
• Which of the following pesticides act as cholinesterase inhibitors?
• Which is an example of an engineering laser safety control measure?
• What is the primary difference between personal exposure monitoring and area monitoring?
• Noise can be described by frequency content as which of the following?
• What is the purpose of using a backup sorbent in sorbent sampling?
• Occupational diseases is considered a branch of hygiene.
• Which of the following is NOT in the scope of occupational hygiene?
• Which statement correctly distinguishes toxicity from hazard?
• Ultraviolet radiation is the highest energy non-ionizing radiation.
• Acoustic trauma results in damage to the ear from a sharply rising wave front. Which statement is true?
• Why is pump calibration critical in active air sampling?
• What do LOD and LOQ stand for, and why are they important in exposure data?
• What is the primary objective of occupational hygiene in workplace settings?
• Tremometriya is a method for investigating
• Toxicokinetics is the study of what?
• The Anffimov test is designed to assess concentration of attention.
• In toxicology, which statement is correct about poisons?
• Which measure best prevents fatigue?
• Which statement correctly describes the recommended signage for laser facility entrances?
• According to the change of intensity in time, noise can be described as which of the following?
• Why are exposure data often analyzed as lognormal distributions?
• In the textile industry, which hazard creates the biggest professional risk?
• Which statement best describes the objective of occupational health?
• Health effects of pollution exposure: which statement is true?
• Which statement best describes LOAEL?
• Pesticides from class 3 slightly hazardous have LD50 for rat (oral) in which range?
• Health effects to the skin and eyes may occur after exposure to UV radiation. Which statement is true?
• In passive sampling, under what circumstances is it typically preferred over active sampling?
• In the context of risk assessment, which sequence is commonly used?
• Which is an example of an engineering laser safety control measure?
• What is the best way to prevent injury at work?
• Which monitoring approach provides data representing ambient concentrations in the work environment rather than individual workers?
• What is the best way of limiting exposure to toxic substances?
• Non-ionizing radiation examples include which of the following?
• Fatigue is which type of process?
• Short-Term Exposure Limit (STEL) is defined as a maximum concentration for a short period, typically how long, with what minimum recovery window?
• Exposure data in many occupational settings are best described by which distribution?
• Which arrangement correctly reflects the hierarchy of controls from most to least effective?
• Which phrase correctly defines IDLH (Immediately Dangerous to Life or Health) and signals when emergency response is required?
• Any kind of laser warning signs can be used at the entrances to a laser facility.
• Safety goggles protect against which hazard?
• Hazard and risk are synonymous.
• What is the primary purpose of lockout/tagout (LOTO) in occupational hygiene practice?
• Determination of acetylcholinesterase level is a medical test for evaluation of exposure to which pesticides?
• Which statement best describes the relationship between hazard and exposure?
• Which PPE components are typically considered when handling highly toxic pesticides?
• What is a Hazard Identification and Risk Assessment (HIRA) process in OH practice?
• Which of the following describes a HEPA filter and its typical use in occupational hygiene?
• Which control is most characteristic of ionizing radiation safety in the workplace?
• What is the occupational exposure limit for noise relevant to prevention of hearing loss?
• Identify three risk factors for heat-related illness.
• The principal routes of industrial exposure are dermal and inhalation. Which statement is true?
• How do area monitoring results relate to personal exposure limits in risk assessment?
• When is biological monitoring indicated and what does it assess?
• What factors determine risk when dealing with a chemical hazard in the workplace?
• What does a Permissible Exposure Limit (PEL) represent in practice?
• The LD50 value is typically expressed in which units?
• When considering hazard controls, what does substitution mean?
• Which approach is used to compute a 95% upper confidence limit (UCL) for lognormal exposure data with a small sample size?
• Which statement best reflects the relationship between area monitoring and personal exposure in risk assessment?
• Long-term cadmium exposure primarily affects which organ?
• What does UCL stand for in exposure assessment terminology?
• LDay, Levening, LNight indicators of vibration exposure in the residential environment are:
• A worker is complaining of ringing in his ears. Which statement is correct?
• What is the main objective of occupational health?
• Which parameter of noise exposure most directly influences hearing damage risk?
• Which statement is true about occupational exposure limits?
• Do pesticides include organophosphates and carbamates as cholinesterase inhibitors?