Fundamentals of Industrial Hygiene (IH) Practice Test

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• What is a respiratory protection program and what are its key elements?
• Sum of Static and Velocity Pressure is called what?
• Which exposure limit protects against acute effects?
• Collects Contaminant at the point of generation
• A substance that causes kidney damage is called
• What is the standard unit used to express the frequency of sound waves?
• Which statistic is used to quantify dispersion around the mean and includes the concept of variance and standard deviation?
• Which calculation correctly yields the air changes per hour (ACH) when given room volume V and volumetric flow rate Q?
• The amount of a chemical absorbed is called
• Which example represents an engineering control in the hierarchy of controls?
• What is the difference between a sorbent tube and a filter in IH sampling?
• In sorbent-tube VOC sampling, what is Tenax TA and what happens to adsorbed VOCs before analysis?
• Why would you perform a smoke study during ventilation assessment?
• Give examples of BEIs commonly used in IH.
• Which sampling device is used for sampling particulates and fibers such as welding fumes and asbestos?
• Which term describes any pressure variation that can be detected by the human ear?
• Which is a step in performing a Job Hazard Analysis?
• The acronym ACH stands for which of the following?
• Direct Reading Instruments vs Sample Collection Devices: Direct Reading Instruments provide immediate results.
• Which statement best defines the Action Level in exposure monitoring?
• LD50 refers to the lethal dose for what percentage of the population?
• Sum of Static and Velocity Pressure
• What is the primary purpose of a sorbent tube in IH sampling?
• What is the difference between inhalable and respirable dust, and why does it matter?
• Which term is defined as any pressure variation the human ear can detect?
• Which tool is used to monitor heat stress exposure in workers?
• Mass balance in ventilation analysis describes what?
• Which set of hazards is included in the Testing and Monitoring Order: Oxygen content (19.5%-23.5%), Flammability less than 10% of LEL, Toxins?
• What does ACH stand for and what does it measure?
• In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?
• Which statistic is the most frequently occurring value?
• What factors influence the selection of air sampling location for an exposure assessment?
• Which instrument uses ultraviolet ionization rather than color change to detect vapors?
• Air changes per hour (ACH) is calculated by...
• What are SDS and GHS pictograms used for in IH?
• What is a recommended approach to evaluating the adequacy of a ventilation system in a manufacturing area?
• What term refers to the amount of noise measured over a workday and expressed as a percentage?
• How should an exposure that exceeds the OSHA PEL but is below a TLV be interpreted, and what action is typical?
• What is the primary purpose of hearing conservation programs in the workplace?
• Hood: Collects contaminants at the source
• Which statement best describes how dermal exposure is assessed?
• What is the primary purpose of industrial hygiene?
• A poisonous substance derived from an organism is referred to as which term?
• Which term describes multiple samples taken but do not cover the entire 8 hour shift?
• What is biological monitoring and when is it appropriate in IH practice?
• Which administrative control helps workers tolerate heat by gradually increasing exposure?
• Tested by dropping an 8-pound weight from a height of 5 feet
• Which concept is primarily concerned with how high or low a sound is perceived?
• Toxicology is the science that studies the harmful or toxic properties of substances. Which term best matches this definition?
• Which term describes pressure created by a fan that exerts outward pressure perpendicular to the direction of airflow?
• What is the purpose of tracer gas tests in ventilation assessment?
• Which term is used to indicate the requirement for additional monitoring when exposure is at a threshold, often acting as a trigger?
• What is Local Exhaust Ventilation (LEV) and how does it reduce exposure?
• What is the purpose of a medical evaluation before respirator use, and what does it typically assess?
• What quantity is related to pitch and tone and measured in Hertz (Hz)?
• Takes into consideration any contamination from production of the media
• Routes of Exposure - Ingestion describes exposure through which route?
• Which biomarker is used in BEI for benzene exposure?
• Which sampling approach collects a single sample taken for less than eight hours?
• When is biological monitoring appropriate in industrial hygiene?
• If no PEL exists for a chemical, which regulatory alternatives may be used?
• Which term describes substances that primarily cause kidney damage?
• Which concept is used to describe how much noise exposure has accumulated over a shift?
• If hazard exists but there is no exposure, what is the risk?
• Which term describes the amount adjusted for body characteristics such as weight?
• ACGIH STEL Region applies to compounds lacking which two exposure concepts?
• Which four actions are included in the core practice of industrial hygiene?
• Any substance that when taken into the body is injurious to health is described as which term?
• Which is an example of an administrative control?
• Which type of blank sample is opened and resealed immediately at the worksite?
• Which statement about biological monitoring is accurate?
• Routes of Exposure - Absorption describe entry through which body interface?
• If BEI results are above the BEI, what is the typical implication?
• Which statement is correct regarding ACH calculation?
• Which term defines the minimum hood induced velocity to capture contaminants?
• Which term describes the amount of light that lands on a surface?
• Peak Exposures are the highest concentration observed during a sampling period.
• ACGIH STEL is defined as concentrations above the TLV but below the upper concentration level defined as the STEL limit.
• Within a respiratory protection program, what is the purpose of the medical evaluation?
• What does gravimetric mass measurement involve in IH sampling?
• Which statement about TLV is true?
• In the hierarchy of controls, which option is the most effective for eliminating hazards?
• What are the advantages and limitations of PPE as a control?
• How many steps are there in the DoD Exposure Assessment Model?
• Which Army regulation covers the Army Safety and Occupational Health Program?
• Which statement correctly contrasts Direct Reading Instruments with Sample Collection Devices?
• What is the Hazard Communication Standard (HCS) and what are its main elements under GHS?
• Threshold Limit Values (TLVs) are guidelines provided by which organization?
• Uptake refers to the process by which a substance enters the body, commonly described as which exposure process?
• Upper Confidence Limit (UCL) is used to determine if the mean is above a certain value and is often used by regulators for compliance. Which option best describes its purpose?
• Which term describes sampling focused on the general workplace environment to assess control effectiveness?
• What instruments are commonly used for real-time exposure assessment and what are their limitations?
• Which statement correctly describes the three sampling approaches used in industrial hygiene?
• Which blank type detects contamination from media production?
• How is an 8-hour time-weighted average (TWA) defined?
• Which unit expresses the total light emitted by a source?
• What is the purpose of the Hazard Communication (HCS) label and GHS pictograms on chemical containers?
• In a normal distribution, what percentage lies within two standard deviations of the mean?
• Which direct reading instrument uses a color change to indicate concentration due to a chemical reaction?
• The amount of visible light projected onto a surface
• Which statement describes qualitative respirator fit testing?
• What is the role of documentation and recordkeeping in an IH program?
• What is the correct method to assess noise exposure and determine if controls are needed?
• Which term most directly describes the percentage-based representation of noise exposure over a workday?
• Which term describes substances that primarily cause liver damage?
• Which QA activity is commonly used in instrumentation calibration practices?
• Why do PELs vary by chemical and how regulators approach hazards?
• The term for the characteristic of sound that determines how high or low it sounds is which of the following?
• Which term describes a regulatory threshold indicating when exposure monitoring and additional controls are warranted?
• Which statement best describes the regulatory status when an exposure exceeds the PEL but is below the TLV?
• In IH practice, how do hazard recognition and exposure assessment differ?
• A substance that causes liver damage is called
• In the DoD Exposure Assessment Model, the metric of 'highest number minus lowest number' corresponds to which statistic?
• Which term is used to describe the study of the harmful effects of substances on health?
• What does AR stand for in Army safety documentation?
• Routes of Exposure - Inhalation involves exposure through which organ system?
• Noise Dose is best described as:
• Which sampling device allows for sampling without a pump?
• Which metric would be most appropriate for summarizing a worker's daily noise exposure as a percent of a limit?
• The minimum hood induced air velocity necessary to capture and transport the contaminant
• How do you differentiate between inhalation exposure and dermal exposure in an IH program?
• In IH risk assessment, what is the role of a Job Hazard Analysis?
• ACGIH STEL is defined as concentrations above the TLV but below the upper concentration level defined as what?
• Heated Wire Anemometer: Direct Reading Instrument
• Last line of defense against hazards
• Which sampling device is used for sampling gases and/or vapors?
• Which statistic measures the average distance of data points from the mean?
• A dose that is lethal to 50% of the population is known as
• Which instrument is commonly used for real-time VOC detection in IH?
• Which term describes a substance that damages the nervous system?
• Define calibration in IH instrumentation and name a QA activity.
• Which index accounts for ambient air temperature, radiant heat, air movement, and humidity?
• Which direct reading instrument ionizes vapors using an internal ultraviolet (UV) lamp?
• Which is the first step in the DoD Exposure Assessment Model?
• Which device is appropriate for passive sampling, requiring no pump?
• Which concept is used to prevent acute effects for chemicals that do not have an explicit STEL or Ceiling?
• A solid particle aerosol produced by condensation of vapors or combustion products (e.g., welding fume) is called
• How do you determine if a control is effective after implementation?
• A poison or poisonous agent is called what?
• Which sampling approach collects multiple samples during an eight-hour shift?
• Recommended Exposure Limits (RELs) are provided by which agency?
• Defined as a space not designed for continuous occupancy, limited or restricted means of entry and exit
• Which term is used to describe the components of LEV?
• Which exposure limit concept is normally based on a time-weighted average and assumes 8-hour workday, 5-day week over a 40-year career?
• Which statement best describes the difference between qualitative and quantitative respirator fit testing?
• A concentration lethal to 50% of the population is known as
• How do general ventilation and local exhaust ventilation differ in IH?
• Which of the following is NOT a component of the hierarchy of controls?
• Which sampling type is used to determine the efficiency of controls?
• Which statement differentiates a permissible exposure limit (PEL) from a threshold limit value (TLV)?
• Unit of measure that expresses the amount of visible light emitted from a light source
• In a normal distribution, what percentage lies within three standard deviations of the mean?
• In hazard control, which option is considered the last line of defense?
• What is the hazard vs risk concept in IH terms?
• Tight Fitting requires Fit Testing
• Dilution of contaminated air with uncontaminated air to control airborne health hazards
• Which statement about the Short-Term Exposure Limit (STEL) is correct?
• Which statistic is defined as the middle value when data are ordered?
• Where is Personal Air Sampling typically performed?
• Which statement best differentiates general ventilation from LEV?
• Which route of exposure is exemplified by an injection?
• Lower Confidence Limit (LCL) is used to determine if the mean is below a certain value. Which statement best reflects its role?
• What is a gravimetric method for dust sampling and when is it used?
• What does Assigned Protection Factor (APF) mean and how is it used?
• Name a common industrial solvent hazard and one engineering control to reduce exposure.
• Which sampling approach collects a single sample during an eight-hour shift?
• Explain the difference between acute and chronic exposure risk.
• Describe a sorbent-tube sampling method for VOCs and how it is analyzed.
• In exposure assessment, which term describes the amount of substance that enters the body?
• What is ALARA and how does it guide industrial hygiene practice?
• Which parameter is most directly used to quantify the rate of cycles per second in a sound?
• Which instrument is described as a direct reading instrument?
• What is the primary outcome measured by gravimetric dust sampling?
• Differentiate between personal sampling and area sampling in IH.
• IDLH stands for what safety term?
• What is the purpose of a hazard communication training program?
• Define an exposure control plan and its essential components.
• LC50 refers to the lethal concentration for what percentage of the population?
• Which organization publishes Permissible Exposure Limits (PELs)?
• Which statement best describes the purpose of GHS pictograms on labels?
• Why is pump calibration essential before IH sampling, and what are common methods?
• Which element is NOT typically part of an exposure control plan?
• What does LEV stand for in ventilation terminology?
• Pressure due to movement of air (always positive) is known as what?
• What is the mean of a data set?
• The purpose of the Hierarchy of Controls is to do what?
• What does CFR stand for?
• Which method is described as the most legally defensible and is measured in the air breathing zone of the worker?
• Which of the following best describes Noise Dose?
• Which statement accurately reflects ALARA in practice?
• Which statement correctly contrasts Direct Reading Instruments with Sample Collection Devices?
• Which regulation governs general industry safety standards in the United States?
• In acoustics, which quantity corresponds to pitch and is measured in cycles per second (Hz)?
• If a sound has a high frequency, it is generally perceived as having a higher what?
• Which device is commonly used to collect welding fumes?