4b051 Bioenvironmental Engineering Journeyman CDC Ure Questions Vol. 2

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  • 1/124 Questions

    Accurate routine and special assessment data in Defense Occupational and Environmental Health Readiness System (DOEHRS) is used for what purpose?

    • Determine hazardous duty pay.
    • Determine fitness for duty qualification.
    • Make recommendations to protect aircraft supplies and equipment.
    • Make recommendations to protect workers from health threats and risks.
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About This Quiz

This volume 2 of the 4B051 Bioenvironmental Engineering Journeyman CDC URE questions focuses on assessing and managing occupational and environmental health risks. It covers responsibilities, regulations, and systems relevant to bioenvironmental engineering, preparing learners for effective leadership in health protection.

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  • 2. 

    Which Code of Federal Regulation deals with protecting human health and welfare as related to the workplace?

    • Title 10, Energy.

    • Title 29, Labor.

    • Title 40, Protection of Environment.

    • Title 49, Transportation.

    Correct Answer
    A. Title 29, Labor.
    Explanation
    Title 29, Labor is the correct answer because it specifically deals with protecting human health and welfare as related to the workplace. This title of the Code of Federal Regulations contains regulations and standards related to occupational safety and health, including requirements for workplace safety, health standards, and worker protections. It covers a wide range of topics such as hazardous materials, occupational exposure to harmful substances, workplace safety standards, and employee rights and protections.

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  • 3. 

    Which of the following web-based application systems is the AF-approved occupational and environmental health management information system?

    • Phoenix.

    • Command Core.

    • Aerospace Medicine Management System.

    • Defense Occupational and Environmental Health Readiness System.

    Correct Answer
    A. Defense Occupational and Environmental Health Readiness System.
    Explanation
    The AF-approved occupational and environmental health management information system is the Defense Occupational and Environmental Health Readiness System. This system is specifically designed to manage and track occupational and environmental health data for the Air Force. Phoenix, Command Core, and Aerospace Medicine Management System are not specifically mentioned as AF-approved systems for this purpose.

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  • 4. 

    Which is not needed to have successful risk communication?  

    • Clear.

    • Complex.

    • Consistent.

    • Understandable.

    Correct Answer
    A. Complex.
    Explanation
    Successful risk communication requires clear, consistent, and understandable messaging. Complex messaging can often lead to confusion and misunderstandings, making it difficult for individuals to make informed decisions about risks. Therefore, complexity is not needed for successful risk communication.

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  • 5. 

    When is water from a surface source considered safe?  

    • After it is tested and approved.

    • When it comes from melted snow.

    • After it is approved by the Defense Logistics Agency.

    • When it is located 100 ft away from a contamination source.

    Correct Answer
    A. After it is tested and approved.
    Explanation
    Water from a surface source is considered safe only after it has been tested and approved. This means that it has undergone a thorough analysis to ensure that it meets the required standards for drinking water. Testing is necessary to identify any potential contaminants or pollutants that may be present in the water, and approval is given only if the water meets the necessary quality and safety criteria. Therefore, this is the correct answer as it highlights the importance of testing and approval in determining the safety of water from a surface source.

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  • 6. 

    What is the natural process where there is a constant circulation of water and water vapor powered by energy from the sun and gravity?

    • Hydrologic cycle.

    • Groundwater cycle.

    • Condensation cycle.

    • Transpiration cycle.

    Correct Answer
    A. Hydrologic cycle.
    Explanation
    The correct answer is the hydrologic cycle. This is a natural process where there is a constant circulation of water and water vapor, powered by energy from the sun and gravity. It involves processes such as evaporation, condensation, precipitation, and runoff, and is responsible for the distribution of water on Earth.

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  • 7. 

     What law passed by congress established a Federal program to monitor and increase the safety of all publically and commercially supplied drinking water?

    • Safe Drinking Water Act.

    • Well Head Protection Program.

    • Safe Drinking Water Surveillance Program.

    • National Primary Drinking Water Regulation.

    Correct Answer
    A. Safe Drinking Water Act.
    Explanation
    The Safe Drinking Water Act is the correct answer because it is a law passed by Congress that established a Federal program to monitor and increase the safety of all publicly and commercially supplied drinking water. The other options, such as the Well Head Protection Program, Safe Drinking Water Surveillance Program, and National Primary Drinking Water Regulation, are not the correct answer because they do not specifically refer to the law passed by Congress.

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  • 8. 

    Which of the following terms refers to the Defense Occupational and Environmental Health Readiness System (DOEHRS) data stored on an individual worker’s history of pre-deployment, deployment, and post-deployment exposures?

    • Routine exposure record.

    • Vertical record of exposure.

    • Longitudinal exposure record.

    • Historical exposure data record.

    Correct Answer
    A. Longitudinal exposure record.
    Explanation
    The correct answer is "Longitudinal exposure record." This term refers to the DOEHRS data that is stored on an individual worker's history of pre-deployment, deployment, and post-deployment exposures. It tracks and records the worker's exposure to occupational and environmental hazards over time, providing a comprehensive record of their exposure history.

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  • 9. 

    Translating qualitative and quantitative data into understandable information for commanders occurs during which step of the health risk assessment (HRA)?

    • Supervise and review.

    • Communicating HRA Results.

    • Determining the Health Risk Estimate.

    • Identifying/Recommending/Implementing Controls.

    Correct Answer
    A. Communicating HRA Results.
    Explanation
    During the step of communicating HRA results, the process of translating qualitative and quantitative data into understandable information for commanders takes place. This step involves presenting the findings and conclusions of the health risk assessment in a clear and concise manner, ensuring that the information is easily comprehensible to the decision-makers. By effectively communicating the results, commanders can make informed decisions and take appropriate actions to mitigate any identified health risks.

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  • 10. 

    Which of the following is not a bioenvironmental engineering (BE) role in regard to control options?

    • Communicate control options and resulting impacts on personnel and the mission.

    • Decide whether or not to implement recommended controls and accept ancillary risks.

    • Determine which controls are appropriate to reduce health threat exposures to acceptable levels.

    • Recommend which controls are appropriate to reduce health threat exposures to acceptable levels

    Correct Answer
    A. Decide whether or not to implement recommended controls and accept ancillary risks.
    Explanation
    The correct answer is "Decide whether or not to implement recommended controls and accept ancillary risks." This option does not align with the role of bioenvironmental engineering (BE) in regard to control. BE professionals are responsible for determining and recommending appropriate controls to reduce health threat exposures to acceptable levels. They also communicate control options and their impacts on personnel and the mission. However, the decision to implement controls and accept risks is typically made by higher-level authorities or management, not by BE professionals themselves.

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  • 11. 

    Of the factors to consider when developing a risk communication message and determining how to deliver it, what question should you ask about the audience?

    • How dangerous is it?

    • Who will be harmed?

    • What are my options?

    • Whom are we communicating with

    Correct Answer
    A. Whom are we communicating with
    Explanation
    When developing a risk communication message and determining how to deliver it, it is important to ask the question "Whom are we communicating with?" This question helps in understanding the specific characteristics, needs, and preferences of the audience. By knowing the target audience, the message can be tailored to effectively reach and engage them. Different audiences may require different communication strategies, channels, and formats to ensure the message is understood and acted upon appropriately.

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  • 12. 

    Who will decide whether to accept the health risks identified in lieu of operational benefit?

    • Bioenvironmental engineering (BE).

    • Commander.

    • Civil Engineer.

    • Base Safety Officer.

    Correct Answer
    A. Commander.
    Explanation
    The Commander will decide whether to accept the health risks identified in lieu of operational benefit. As the highest-ranking officer in charge, the Commander has the authority and responsibility to make decisions that prioritize the overall mission and operational benefit, even if it involves accepting certain health risks. The Commander will consider input from various sources, including the Bioenvironmental Engineering (BE) team, the Civil Engineer, and the Base Safety Officer, but ultimately, the decision rests with the Commander.

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  • 13. 

    What action(s) should be taken if the initial disinfection fails to produce satisfactory bacteriological results or if other water quality is affected?  

    • Main is repaired and accepted.

    • Main is reflushed and accepted.

    • Main is resampled after 16 hours.

    • Main is reflushed and re-sampled.

    Correct Answer
    A. Main is reflushed and re-sampled.
    Explanation
    If the initial disinfection fails to produce satisfactory bacteriological results or if other water quality is affected, the appropriate action to be taken is to reflush the main and then re-sample it. This means that the water main should be flushed to remove any contaminants or impurities that may be affecting the water quality. After the flushing process, a new sample should be taken to test the bacteriological results and ensure that the water quality has improved.

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  • 14. 

    What disinfectants are the only disinfectants that provide a residual in the distribution system?  

    • Sodium-based.

    • Chlorine-based.

    • Ammonia-based.

    • Hydroxide-based.

    Correct Answer
    A. Chlorine-based.
    Explanation
    Chlorine-based disinfectants are the only disinfectants that provide a residual in the distribution system. This means that even after the initial disinfection process, chlorine-based disinfectants continue to remain in the water supply, providing ongoing protection against microbial contamination. Sodium-based, ammonia-based, and hydroxide-based disinfectants do not have this residual effect and therefore do not provide the same level of long-lasting disinfection in the distribution system.

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  • 15. 

    Which of the following fully qualified people can verify the accuracy and completeness of all exposure assessment data that is entered into Defense Occupational and Environmental Health Readiness System (DOEHRS)?

    • Bioenvironmental Engineer and Bioenvironmental Engineer (BE) Apprentice.

    • BE Apprentice and Civilian Industrial Hygienist.

    • BE Craftsman and Aerospace Medicine Commander.

    • Bioenvironmental Engineer and Civilian Industrial Hygienist.

    Correct Answer
    A. Bioenvironmental Engineer and Civilian Industrial Hygienist.
    Explanation
    The Bioenvironmental Engineer and Civilian Industrial Hygienist are the fully qualified individuals who can verify the accuracy and completeness of all exposure assessment data entered into DOEHRS. The other options do not include both a Bioenvironmental Engineer and a Civilian Industrial Hygienist, so they are not fully qualified to perform this task.

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  • 16. 

    What governmental bureau requires that sanitary surveys be conducted for water systems that use ground water or surface water sources?

    • US Department of Agriculture.

    • US Environmental Protection Agency.

    • Centers for Disease Control and Prevention.

    • Occupational Safety and Health Administration.

    Correct Answer
    A. US Environmental Protection Agency.
    Explanation
    The US Environmental Protection Agency (EPA) requires that sanitary surveys be conducted for water systems that use ground water or surface water sources. Sanitary surveys are conducted to assess the overall condition of the water system and to identify any potential sources of contamination. The EPA is responsible for setting regulations and standards to protect public health and the environment, including the safety and quality of drinking water. Conducting sanitary surveys helps to ensure that water systems are meeting these standards and that the water being provided to the public is safe to drink.

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  • 17. 

    What do terrorists and militant groups consider an Air Force potable water supply?

    • Threat.

    • Security risk.

    • Credible target.

    • Security challenge

    Correct Answer
    A. Credible target.
    Explanation
    Terrorists and militant groups consider an Air Force potable water supply a credible target. This means that they view it as a valuable and significant objective that they can potentially attack or sabotage. This is because access to clean water is essential for the functioning and well-being of military personnel, and targeting the water supply can disrupt operations and cause harm.

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  • 18. 

    During water vulnerability assessment, your focus is on field activities and the gathering of information necessary to characterize vulnerability, risk, and control options. What phase of the assessment are you performing?  

    • Follow-up.

    • Pre-Assessment.

    • Information Gathering.

    • Information Processing.

    Correct Answer
    A. Information Gathering.
    Explanation
    The question asks about the phase of the assessment where the focus is on field activities and gathering necessary information to characterize vulnerability, risk, and control options. The correct answer, "Information Gathering," aligns with this description as it specifically mentions the gathering of information. The other options, "Follow-up," "Pre-Assessment," and "Information Processing," do not accurately describe this phase of the assessment.

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  • 19. 

    Your bioenvironmental engineering (BE) has informed you that you need to collect a water sample that characterizes the water quality at the dining hall at 0900. Which type of sample do you need to collect?  

    • Bulk.

    • Grab.

    • Integrated.

    • Composite.

    Correct Answer
    A. Grab.
    Explanation
    To characterize the water quality at a specific time, a grab sample is needed. A grab sample is a single sample collected at a specific location and time, providing a snapshot of the water quality at that moment. This type of sample is commonly used when the water quality may vary over time, such as in a dining hall where water usage fluctuates throughout the day. A grab sample allows for a quick and representative assessment of the water quality at a specific point in time.

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  • 20. 

    When sampling a 55-gallon drum that contains an unknown substance, why should you not add any preservatives?

    • Adding a preservative will contaminate the liquid in the drum.

    • It could overfill the drum and cause a hazardous materials spill.

    • The preservative could cause a reaction with the unknown substance.

    • Most unknown substances do not require to be preserved prior to analysis.

    Correct Answer
    A. The preservative could cause a reaction with the unknown substance.
    Explanation
    Adding a preservative to the unknown substance in the drum could potentially cause a reaction. Since the substance is unknown, it is impossible to predict how it will react with the preservative. This could lead to the creation of hazardous fumes or the formation of unstable compounds. Therefore, it is best to avoid adding any preservatives to prevent any potential reactions or further contamination of the substance.

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  • 21. 

    When you send a piece of sampling equipment in for calibration, the equipment

    • Is compared to a known standard.

    • Has new rechargeable batteries installed.

    • Is tested to ensure the power cord is not frayed or worn.

    • Is exchanged with a piece of equipment that is already calibrated.

    Correct Answer
    A. Is compared to a known standard.
    Explanation
    When you send a piece of sampling equipment in for calibration, it is compared to a known standard. This is done to ensure that the equipment is measuring accurately and providing reliable results. By comparing it to a known standard, any discrepancies or errors in the equipment's measurements can be identified and corrected. This helps to maintain the accuracy and precision of the equipment, ensuring that it continues to provide accurate measurements in future sampling activities.

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  • 22. 

    If any of your sampling equipment was contaminated, it could cause

    • Invalid sampling results.

    • Skin contact hazard to the user.

    • Damage to the sampling equipment.

    • No problem as long as the contamination was minimal.

    Correct Answer
    A. Invalid sampling results.
    Explanation
    If any of the sampling equipment used is contaminated, it can lead to invalid sampling results. Contamination can introduce foreign substances or particles into the sample, affecting its composition and accuracy. This can lead to misleading or incorrect results, compromising the validity of the sampling process.

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  • 23. 

      If upon arriving at an industrial facility, you conducted a quantitative assessment to focus Bioenvironmental Engineering (BE) resources on occupational and environmental health (OEH) related hazards that require additional evaluation, then what type of OEH process assessment have you conducted?

    • Routine.

    • Special

    • Periodic.

    • Termination.

    Correct Answer
    A. Special
    Explanation
    The correct answer is "Special." This is because a special OEH process assessment is conducted when there is a need for additional evaluation of occupational and environmental health hazards. This assessment is conducted upon arriving at an industrial facility to determine the specific hazards that require further attention and resources from Bioenvironmental Engineering.

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  • 24. 

    Which of the following is not a bioenvironmental engineering (BE) role in the occupational and environmental health site assessment/health risk assessment/health risk management (OESHA/HRA/HRM) processes?

    • Initiate a concise course of action.

    • Determine appropriate control options.

    • Communicate information through your chain of command

    • Identify and analyze occupational and environmental health risks at both garrison and deployed locations.

    Correct Answer
    A. Initiate a concise course of action.
    Explanation
    The correct answer is "Initiate a concise course of action." In the occupational and environmental health site assessment/health risk assessment/health risk management processes, bioenvironmental engineering (BE) roles involve identifying and analyzing occupational and environmental health risks at both garrison and deployed locations, determining appropriate control options, and communicating information through the chain of command. However, initiating a concise course of action is not specifically mentioned as a BE role in these processes.

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  • 25. 

     Which occupational exposure control should be used in conjunction with other controls?

    • Engineering.

    • Administrative.

    • Preventive maintenance.

    • Personal Protective Equipment.

    Correct Answer
    A. Personal Protective Equipment.
    Explanation
    Personal Protective Equipment (PPE) should be used in conjunction with other controls in order to provide an additional layer of protection for workers. While engineering controls, administrative controls, and preventive maintenance are important in reducing occupational exposure, they may not always be sufficient on their own. PPE, such as gloves, goggles, masks, and protective clothing, can help to further minimize the risk of exposure to hazards in the workplace. Therefore, it is recommended to use PPE along with other control measures to ensure the safety and well-being of workers.

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  • 26. 

    Bioenvironmental engineers (BEs) recommendations to commanders should have which three basic parts?

    • Timely, Practical, Effective.

    • Practical, Timely, Inexpensive.

    • Timely, Inexpensive, Effective.

    • Practical, Effective, Inexpensive.

    Correct Answer
    A. Timely, Practical, Effective.
    Explanation
    The recommendations provided by Bioenvironmental engineers (BEs) to commanders should be timely, meaning they should be provided in a timely manner to address the current situation. They should also be practical, meaning they should be feasible and realistic to implement. Additionally, the recommendations should be effective, meaning they should achieve the desired outcome or result. Therefore, the three basic parts of BEs recommendations should be timely, practical, and effective.

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  • 27. 

    What ground characteristics allow water to move freely?

    • Caliche rock layers.

    • Clay and rock layers.

    • Sand and gravel layers.

    • Crystalline rock layers.

    Correct Answer
    A. Sand and gravel layers.
    Explanation
    Sand and gravel layers have larger pore spaces compared to other ground characteristics like clay, rock, and caliche rock layers. These larger pore spaces allow water to move more freely through the ground. The water can easily flow through the gaps between the sand and gravel particles, resulting in better drainage and less water retention in the soil. This makes sand and gravel layers ideal for groundwater recharge and infiltration.

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  • 28. 

    Which phase of a base sanitary survey should generate a list of items to check in the field?

    • Planning.

    • Reporting.

    • Follow-up.

    • Conducting.

    Correct Answer
    A. Planning.
    Explanation
    During the planning phase of a base sanitary survey, a list of items to check in the field should be generated. This is because the planning phase involves gathering information, assessing the scope of the survey, and determining the objectives and methods to be used. By generating a list of items to check in the field during this phase, the survey team can ensure that all necessary aspects are covered and that the survey is conducted efficiently and effectively.

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  • 29. 

    When would it be advantageous to use field analytical screening methods that are direct reading?  

    • When you need to confirm indirect reading instrument sampling results.

    • When an immediate answer is necessary or time is a constraint.

    • When you don’t have access to indirect reading instruments.

    • When you are in a potentially explosive atmosphere.

    Correct Answer
    A. When an immediate answer is necessary or time is a constraint.
    Explanation
    Field analytical screening methods that are direct reading are advantageous when an immediate answer is necessary or time is a constraint. This means that when there is a need for quick results, these methods can provide immediate readings without the need for additional analysis or interpretation. This can be particularly useful in situations where time is limited, such as during emergency response or when making real-time decisions in the field.

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  • 30. 

    Within the Occupational and Environmental Health (OEH) Program, which of the following are Bioenvironmental Engineering responsibilities?

    • Providing input to the Force Protection Working Group, determining compliance standards, and implementing administrative controls.

    • Updating OEH exposure data, implementing workplace risk controls, and communicating hazard information directly to regulatory authorities.

    • Accomplishing OEH risk assessments, recommending and evaluating OEH hazard controls, and communicating risks to the organizational leadership.

    • Proving emergency management incident response, conducting OEH risk assessments when time permits, and managing risks identified by organizational leadership.

    Correct Answer
    A. Accomplishing OEH risk assessments, recommending and evaluating OEH hazard controls, and communicating risks to the organizational leadership.
    Explanation
    The responsibilities of Bioenvironmental Engineering within the Occupational and Environmental Health (OEH) Program include accomplishing risk assessments, recommending and evaluating hazard controls, and communicating risks to the organizational leadership. This involves identifying potential hazards in the workplace, assessing the level of risk they pose, and proposing measures to control or mitigate these risks. The communication of these risks to the organizational leadership is crucial for decision-making and ensuring the overall health and safety of the organization.

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  • 31. 

    Which of the following is not a form of substitution?  

    • Substitution of process.

    • Substitution of materials.

    • Substitution of personnel.

    • Substitution of equipment

    Correct Answer
    A. Substitution of personnel.
    Explanation
    The correct answer is "Substitution of personnel." This is because substitution of personnel refers to replacing or exchanging one employee with another, which is not a form of substitution in the context of the question. The other options, such as substitution of process, materials, and equipment, all involve replacing or using alternatives for a specific element or component, making them forms of substitution.

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  • 32. 

    Who has the responsibility to ensure that the personal protective equipment recommended for a particular tasks will do the job for which it is designed?

    • Bioenvironmental engineering (BE).

    • Chief of Safety.

    • Workplace employee.

    • Workplace supervisor.

    Correct Answer
    A. Bioenvironmental engineering (BE).
    Explanation
    Bioenvironmental engineering (BE) is responsible for ensuring that the personal protective equipment (PPE) recommended for a particular task will do the job for which it is designed. They have the expertise and knowledge to assess the specific hazards and risks associated with the task and recommend the appropriate PPE to mitigate those risks. The Chief of Safety, workplace employee, and workplace supervisor may also play a role in ensuring PPE is used correctly, but the ultimate responsibility lies with BE.

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  • 33. 

    What is one reason groundwater sources are generally preferred over surface water sources for drinking?

    • Groundwater has a low turbidity.

    • Groundwater has a variable supply.

    • Groundwater has high calcium levels.

    • It is easy to determine the quantity of groundwater.

    Correct Answer
    A. Groundwater has a low turbidity.
    Explanation
    Groundwater is generally preferred over surface water sources for drinking because it has a low turbidity. Turbidity refers to the cloudiness or haziness of a fluid caused by suspended particles. Groundwater, being located underground, is naturally filtered through layers of soil and rock, which helps to remove impurities and particles, resulting in a clearer and cleaner water source. In contrast, surface water sources such as rivers and lakes are more prone to contamination from pollutants and sediment, leading to higher turbidity levels. Therefore, the low turbidity of groundwater makes it a safer and more desirable option for drinking water.

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  • 34. 

    Water obtained in the field from rivers, streams, ponds, lakes, wells, ice, or snow is referred to as what type of source?  

    • Raw water.

    • Potable water.

    • Ground water.

    • Palatable water.

    Correct Answer
    A. Raw water.
    Explanation
    Raw water refers to water that is obtained directly from natural sources such as rivers, streams, ponds, lakes, wells, ice, or snow without any treatment or purification. It is called raw water because it has not undergone any processes to make it safe for consumption. Raw water may contain various impurities, such as bacteria, viruses, chemicals, and sediments, which can pose health risks if consumed without proper treatment.

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  • 35. 

     Who has primary responsibility for the backflow prevention and cross-connection control program?  

    • Public Health.

    • Flight Medicine.

    • Civil Engineering.

    • Bioenvironmental Engineering.

    Correct Answer
    A. Civil Engineering.
    Explanation
    Civil Engineering has primary responsibility for the backflow prevention and cross-connection control program. This is because civil engineers are trained to design and maintain the infrastructure necessary to prevent backflow and cross-connections in plumbing systems. They are responsible for ensuring that water flows in the correct direction and does not become contaminated or mixed with other substances. Public Health may be involved in overseeing the program and ensuring compliance with health regulations, while Flight Medicine and Bioenvironmental Engineering may play a supporting role in specific cases, but Civil Engineering has the primary responsibility.

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  • 36. 

      Which method of collecting data would be used to screen samples and give a quick initial understanding of potential occupational and environmental health (OEH) threats during a reconnaissance mission?

    • Base analysis.

    • Field analysis.

    • Special analysis.

    • Laboratory analysis.

    Correct Answer
    A. Field analysis.
    Explanation
    Field analysis would be the method of collecting data that would be used to screen samples and give a quick initial understanding of potential occupational and environmental health (OEH) threats during a reconnaissance mission. This method involves collecting and analyzing data on-site, typically in the field, rather than sending samples to a laboratory for analysis. It allows for immediate assessment and identification of potential threats, enabling quick decision-making and response to protect the health and safety of individuals involved in the mission.

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  • 37. 

    What type of sampler is best suited to collecting a water sample at various levels of a large tank containing an unknown liquid?

    • Bacon bomb.

    • Long pipette.

    • Handheld dipper.

    • Plastic polypropylene line glass jar attached to a rope.

    Correct Answer
    A. Bacon bomb.
  • 38. 

    When using the Colilert Test, what is indicated if a water sample turns yellow, but does not florescence, following incubation?

    • The sample is positive for total coliform, but negative for E.coli.

    • The sample is negative for total coliform, but positive E.coli.

    • The sample is negative for both total coliform and E.coli.

    • The sample is positive for both total coliform and E.coli.

    Correct Answer
    A. The sample is positive for total coliform, but negative for E.coli.
    Explanation
    The Colilert Test is a method used to detect the presence of coliform bacteria, including E.coli, in water samples. When a water sample turns yellow but does not fluoresce after incubation, it indicates that there is the presence of total coliform bacteria, but E.coli is not present. Therefore, the sample is positive for total coliform, but negative for E.coli.

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  • 39. 

    When is the only time you collect bacteriological samples of a hot tub/spa?  

    • Weekly during times of high usage.

    • When readings indicate there is no chlorine in the water.

    • If an illness occurs as a result of someone using the hot tub/spa.

    • Immediately after the hot tub/spa has been drained and cleaned.

    Correct Answer
    A. If an illness occurs as a result of someone using the hot tub/spa.
    Explanation
    Collecting bacteriological samples of a hot tub/spa is necessary if an illness occurs as a result of someone using it. This is because the illness could be caused by the presence of harmful bacteria in the water, and collecting samples can help identify and analyze the bacteria present. This information is important for determining the appropriate actions to take in order to prevent further illnesses and ensure the safety of the hot tub/spa users.

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  • 40. 

    Changing a hazard source to make it less hazardous is an example of which occupational exposure control?    

    • Engineering.

    • Administrative.

    • Preventive maintenance.

    • Personal Protective Equipment.

    Correct Answer
    A. Engineering.
    Explanation
    Changing a hazard source to make it less hazardous is an example of engineering control. Engineering controls involve modifying or redesigning equipment, machinery, or processes to eliminate or reduce hazards at their source. This can include implementing safety measures such as installing machine guards, using ventilation systems to remove harmful substances, or automating processes to reduce human interaction with hazards. Engineering controls are considered the most effective way to control workplace hazards as they eliminate or minimize the need for workers to rely on personal protective equipment or administrative controls.

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  • 41. 

     If the installation does not purchase its water from a local municipality, who is responsible for preparing the consumer confidence report?

    • Bioenvironmental engineering (BE).

    • Military Public Health (MPH).

    • Major command (MAJCOM).

    • Public Affairs.

    Correct Answer
    A. Bioenvironmental engineering (BE).
    Explanation
    Bioenvironmental engineering (BE) is responsible for preparing the consumer confidence report if the installation does not purchase its water from a local municipality. This is because BE is typically responsible for monitoring and ensuring the quality of water on military installations. They conduct regular testing and analysis of the water supply to ensure it meets safety standards. Therefore, it makes sense that they would also be responsible for preparing the consumer confidence report, which provides information about the water quality to consumers.

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  • 42. 

    What organization is responsible for publishing the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs)?

    • American National Standards Institute.

    • National Institute for Occupational Safety and Health.

    • American Conference of Governmental Industrial Hygienists.

    • US Army Center for Health Promotion and Preventive Medicine.

    Correct Answer
    A. American Conference of Governmental Industrial Hygienists.
    Explanation
    The American Conference of Governmental Industrial Hygienists (ACGIH) is responsible for publishing the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs). TLVs are guidelines that determine the acceptable levels of exposure to various chemical substances in the workplace, while BEIs are biological monitoring guidelines for assessing occupational exposure to chemicals. ACGIH is a professional organization that consists of industrial hygienists and is recognized as a leading authority on occupational and environmental health and safety issues. They regularly review and update TLVs and BEIs based on the latest scientific research and expert consensus.

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  • 43. 

    What step of the Occupational and Environmental Health Site Assessment (OESHA) process is a written depiction that shows the link between occupational and environmental health (OEH) threats and personnel working in similar working groups?

    • Reassessment.

    • Site reconnaissance.

    • Conceptual Site Model.

    • Site Identification/sectoring.

    Correct Answer
    A. Conceptual Site Model.
    Explanation
    The correct answer is Conceptual Site Model. The Conceptual Site Model is a written depiction that shows the link between occupational and environmental health threats and personnel working in similar working groups. It provides a visual representation of the potential pathways for exposure to hazards and helps in understanding the relationship between the site conditions and the health risks to the workers. This step is important in identifying and assessing the potential risks and developing appropriate control measures to protect the workers and the environment.

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  • 44. 

     How do bioenvironmental engineering (BE) personnel accomplish their role as part of the Preventive Medicine (PAM) Team?

    • Disinfect drinking water sources.

    • Drill wells for a drinking water source.

    • Sample and analyze drinking water sources for contamination.

    • Sample and disinfect drinking water sources for contamination.

    Correct Answer
    A. Sample and analyze drinking water sources for contamination.
    Explanation
    Bioenvironmental engineering (BE) personnel accomplish their role as part of the Preventive Medicine (PAM) Team by sampling and analyzing drinking water sources for contamination. This allows them to identify any potential hazards or pollutants in the water that may pose a risk to public health. By conducting regular analysis, they can ensure that the water is safe for consumption and take appropriate measures if contamination is detected. Disinfecting drinking water sources and drilling wells are not mentioned as part of their role in the given options.

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  • 45. 

     What do reverse osmosis water purification unit (ROWPU) operators add to the filtered water to conclude the purification process before storing the water as potable?

    • Calcium.

    • Magnesium.

    • Fluoridation.

    • Disinfectant.

    Correct Answer
    A. Disinfectant.
    Explanation
    After the water has been filtered, reverse osmosis water purification unit (ROWPU) operators add a disinfectant to conclude the purification process before storing the water as potable. This is done to kill any remaining bacteria, viruses, or other microorganisms that may still be present in the water, ensuring that it is safe for consumption. Adding calcium, magnesium, or fluoridation are not part of the purification process and are not necessary for making the water potable.

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  • 46. 

     If a contractor performs your installation’s sanitary survey, what is bioenvironmental engineering’s (BE’s) role in this process?

    • Oversee the survey.

    • Conduct a separate survey.

    • Reaccomplish their survey.

    • Conduct the survey along side of the contractor.

    Correct Answer
    A. Oversee the survey.
    Explanation
    Bioenvironmental engineering's role in the process of a contractor performing the installation's sanitary survey is to oversee the survey. This means that bioenvironmental engineering is responsible for supervising and monitoring the survey conducted by the contractor. They ensure that the survey is conducted accurately and in accordance with the necessary standards and regulations. By overseeing the survey, bioenvironmental engineering plays a crucial role in ensuring the safety and compliance of the installation's sanitary conditions.

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  • 47. 

    Why do you need to use caution when using reagents to decontaminate sample equipment?

    • Reagents can damage the soil if not collected after use.

    • Reagents can leave residue on the sampling equipment.

    • Reagents must be stored separate from any noncompatible materials.

    • Reagents can cause inhalation hazards if not used in a well-ventilated area.

    Correct Answer
    A. Reagents can leave residue on the sampling equipment.
    Explanation
    When using reagents to decontaminate sample equipment, caution must be exercised because reagents can leave residue on the equipment. This residue can potentially contaminate future samples and affect the accuracy of the results. Therefore, it is important to thoroughly clean and remove any residue from the equipment after using reagents to ensure the integrity of subsequent samples.

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  • 48. 

    What is the process by which water is used by vegetation and passes through grass, plants and trees, returning to the atmosphere as vapor?

    • Evaporation.

    • Precipitation.

    • Condensation.

    • Transpiration.

    Correct Answer
    A. Transpiration.
    Explanation
    Transpiration is the correct answer because it refers to the process by which water is taken up by vegetation, including grass, plants, and trees, and then released back into the atmosphere as vapor. During transpiration, water is absorbed by the roots, transported through the plant, and eventually evaporates from the leaves. This process helps to cool the plant, transport nutrients, and maintain the water balance in the plant.

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  • 49. 

     What is the only exception to requiring water mains that have been repaired or cut into be disinfected?

    • Water mains that have remained under water during repairs don’t require disinfection.

    • Water mains that have remained under ground during repairs don’t require disinfection.

    • Water mains that have remained full of water under pressure during repairs don’t require disinfection.

    • Water mains that have remained full of water and under cover during repairs don’t require disinfection.

    Correct Answer
    A. Water mains that have remained full of water under pressure during repairs don’t require disinfection.
    Explanation
    Water mains that have remained full of water under pressure during repairs don’t require disinfection because the pressure prevents any contaminants from entering the pipe.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
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  • Sep 03, 2011
    Quiz Created by
    Mav_2591
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