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Ultimate Exam
Question 1. Which New Mexico agency is primarily responsible for enforcing the state's air quality regulations? A) New Mexico Department of Health B) New Mexico Environment Department (NMED) – Air Quality Bureau C) New Mexico Department of Transportation D) New Mexico Office of the Attorney General Answer: B Explanation: The NMED Air Quality Bureau administers and enforces NM air quality statutes and permits. Question 2. Under the Clean Air Act, which of the following is classified as a primary pollutant? A) Ozone (O₃) B) Sulfur dioxide (SO₂) C) Lead (Pb) D) All of the above Answer: D Explanation: Primary pollutants are emitted directly from sources; SO₂, Pb, and O₃ (as a secondary pollutant formed from precursors) are all listed. Question 3. Which of the following is NOT one of the six EPA criteria pollutants? A) Carbon monoxide (CO) B) Nitrogen dioxide (NO₂) C) Benzene (C₆H₆) D) Particulate matter (PM₂.₅) Answer: C Explanation: Benzene is a hazardous air pollutant, not a criteria pollutant.
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Question 4. In New Mexico, the NMAC 20.2.50 regulation primarily addresses control of which pollutant class? A) Particulate matter B) Ozone precursors (VOCs and NOₓ) C) Lead emissions D) Greenhouse gases Answer: B Explanation: NMAC 20.2.50 sets limits on VOC and NOₓ emissions that form ground-level ozone. Question 5. Which permit type is required for a major stationary source that emits more than 100 tons per year of any regulated pollutant in NM? A) Title V operating permit B) Construction permit only C) Stormwater General Permit D) NPDES waste discharge permit Answer: A Explanation: Title V permits apply to major sources exceeding the “major” threshold. Question 6. The primary purpose of a Continuous Emission Monitoring System (CEMS) is to: A) Measure ambient air quality at nearby residences B) Provide real-time data on stack emissions for compliance C) Detect leaks in underground pipelines D) Estimate greenhouse gas emissions from vehicles Answer: B
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Answer: B Explanation: SO₂ reacts with water vapor to form sulfuric acid, a major component of acid rain. Question 10. The New Mexico Pollutant Discharge Elimination System (NMPDES) regulates: A) Air emissions from stationary sources B) Stormwater runoff from construction sites C) Discharges of wastewater to surface waters D) Solid waste landfill operations Answer: C Explanation: NMPDES is NM’s implementation of the federal NPDES for wastewater discharges. Question 11. Which of the following is a secondary drinking water standard? A) Maximum Contaminant Level (MCL) for lead B) Treatment Technique (TT) for microbial control C) Secondary Maximum Contaminant Level (SMCL) for aesthetic concerns D) Action Level for coliform bacteria Answer: C Explanation: SMCLs address non-health related water quality issues such as taste, color, and odor. Question 12. The “Lead and Copper Rule” (LCR) primarily requires: A) Routine testing for lead in all public water systems B) Replacement of lead service lines when lead levels exceed 15 ppb C) Installation of reverse osmosis plants in all municipalities
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D) Monitoring of copper concentrations only in industrial wastewater Answer: B Explanation: LCR mandates corrosion control and pipe replacement if lead exceeds the EPA action level. Question 13. In water sampling, the preservation method for a sample intended for BOD analysis is: A) Acidification to pH 2 B) Adding sodium thiosulfate to neutralize chlorine C) Cooling to 4 °C and analyzing within 5 days D) Adding mercuric chloride to inhibit microbial growth Answer: C Explanation: BOD samples must be kept cool and analyzed promptly to prevent further biochemical oxygen demand. Question 14. Which of the following is a common hazardous air pollutant (HAP) emitted by oil and gas operations? A) Methane (CH₄) B) Benzene (C₆H₆) C) Carbon dioxide (CO₂) D) Nitrogen (N₂) Answer: B Explanation: Benzene is a carcinogenic HAP often released during venting and flaring. Question 15. The primary health effect of chronic exposure to nitrogen dioxide (NO₂) is: A) Liver damage
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B) Minimum Concentration Limit C) Managed Chemical Load D) Mandatory Compliance Listing Answer: A Explanation: MCL is the EPA-set health-based limit for a contaminant in drinking water. Question 19. Which technology is most effective for controlling particulate matter (PM₁₀) from a coal-fired boiler? A) Selective catalytic reduction (SCR) B) Electrostatic precipitator (ESP) C) Flue-gas desulfurization (FGD) D) Low-NOₓ burner Answer: B Explanation: ESPs capture fine particles by electrostatic attraction, suitable for PM₁₀ control. Question 20. Under the Resource Conservation and Recovery Act (RCRA), a “cradle-to-grave” approach refers to: A) Tracking hazardous waste from generation to disposal B) Recycling all solid waste streams C) Using waste as fuel in industrial processes D) Composting organic waste on site Answer: A Explanation: RCRA requires documentation of hazardous waste handling from creation to final disposal. Question 21. Which of the following inorganic contaminants is regulated under the Safe Drinking Water Act as a primary contaminant?
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A) Nitrate (NO₃⁻) B) Pseudomonas aeruginosa C) Atrazine D) Total dissolved solids (TDS) Answer: A Explanation: Nitrate is a primary MCL-regulated inorganic contaminant because of its link to methemoglobinemia (“blue baby” syndrome. Question 22. In New Mexico, the “General Permit for Stormwater Discharges from Construction Activities” primarily requires: A) Monthly reporting of all stormwater volumes B) Implementation of Best Management Practices (BMPs) to minimize runoff erosion C) Installation of permanent retention ponds on every site D) Continuous monitoring of downstream water quality Answer: B Explanation: The construction stormwater permit focuses on BMPs such as silt fences, stabilized haul roads, and sediment basins to reduce pollutant loads. Question 23. Which of the following is the most appropriate method for measuring ambient ozone concentrations in New Mexico’s air monitoring network? A) UV photometric analyzer (UV-P) B) Non-dispersive infrared (NDIR) analyzer C) Flame ionization detector (FID) D) Chemiluminescence detector Answer: A
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A) 0.5 lb/MMBtu B) 1.0 lb/MMBtu C) 2.0 lb/MMBtu D) 5.0 lb/MMBtu Answer: B Explanation: NM’s NMAC 20.2.50 sets a NOₓ limit of 1.0 lb per million Btu for most new gas-fired units. Question 27. A leak detection and repair (LDAR) program uses optical gas imaging (OGI) cameras. The primary advantage of OGI over traditional EPA Method 21 is: A) Ability to detect leaks in sealed containers B) Real-time visual identification of methane plumes without sampling tubes C) Lower equipment cost D) Requirement for a certified technician Answer: B Explanation: OGI cameras provide instantaneous visual detection of hydrocarbon leaks, eliminating the need for sorbent tubes. Question 28. Which of the following is considered a “point source” discharge under the NMPDES? A) Runoff from agricultural fields B) A pipe discharging treated effluent from a municipal wastewater plant C) Atmospheric deposition of mercury on a lake D) Diffuse groundwater seepage into a river Answer: B Explanation: Point sources are discrete, identifiable discharge points such as pipes.
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Question 29. The “Revised Total Coliform Rule” (RTCR) requires which of the following actions when a sample exceeds the Total Coliform MCL? A) Immediate plant shutdown B) Notification of the public within 24 hours and corrective action within 30 days C) Increased chlorine dosing for the next 48 hours only D) No action if the sample is from a non-public water system Answer: B Explanation: RTCR mandates public notification and corrective actions when coliform standards are violated. Question 30. Which of the following is the most appropriate method for determining total suspended solids (TSS) in a water sample? A) Gravimetric analysis after filtration through a pre-weighed glass fiber filter B) Spectrophotometric measurement at 254 nm C) Titration with EDTA ED Question 31. Under the Clean Water Act, a “NPDES permit” is required for which of the following activities? A) Installing a roof on a commercial building B) Discharging treated effluent from an industrial cooling tower into a river C) Operating a solar panel array D) Using pesticides on private lawns Answer: B Explanation: NPDES permits govern any discharge of pollutants to surface waters, including cooling-tower effluent.
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Answer: B Explanation: The Water Quality Act authorizes NMED to develop and enforce state water-quality standards. Question 35. Which of the following is a common method for controlling VOC emissions from a storage tank vent? A) Installing a packed-bed absorber B) Using a flare stack C) Adding a closed-loop vapor recovery system D) Applying a catalytic oxidizer to the vent pipe Answer: C Explanation: Vapor recovery systems capture and return vapors to the process, reducing VOC venting. Question 36. The “National Ambient Air Quality Standards” (NAAQS) are set for which category of pollutants? A) Hazardous air pollutants (HAPs) only B) Greenhouse gases only C) Criteria pollutants only D) All pollutants listed under the Clean Air Act Answer: C Explanation: NAAQS apply specifically to the six EPA criteria pollutants. Question 37. Which of the following statements about “secondary drinking water standards” is correct? A) They are enforceable health-based limits. B) They address aesthetic concerns such as taste and odor.
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C) They are optional for public water systems. D) They are set by the state only, not the EPA. Answer: B Explanation: Secondary standards are non-health based guidelines for water appearance, taste, and odor. Question 38. A facility’s emissions inventory shows a sulfur dioxide (SO₂) emission rate of 0.8 lb/MMBtu. The facility’s boiler operates at 10 MMBtu/hr. What is the hourly SO₂ emission in pounds? A) 0.08 lb/hr B) 0.8 lb/hr C) 8 lb/hr D) 80 lb/hr Answer: C Explanation: 0.8 lb/MMBtu × 10 MMBtu/hr = 8 lb/hr. Question 39. Which of the following is NOT a typical component of a municipal drinking-water treatment train? A) Coagulation B) Flocculation C) Reverse osmosis (RO) for all public systems D) Disinfection Answer: C Explanation: RO is used only for specific applications (e.g., desalination), not as a standard step for all systems. Question 40. The “Resource Conservation and Recovery Act” (RCRA) subtitle that deals with hazardous waste management is:
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Question 43. Which of the following water quality parameters is most directly used to assess the potential for algal blooms? A) pH B) Dissolved oxygen (DO) C) Nutrient concentration, especially phosphorus D) Conductivity Answer: C Explanation: Elevated phosphorus (and nitrogen) fuels algal growth, leading to blooms. Question 44. The “Clean Air Act” requires states to develop State Implementation Plans (SIPs). The primary purpose of a SIP is to: A) Outline how the state will achieve and maintain NAAQS B) Provide funding for federal air-quality programs C) Regulate indoor air quality in schools D) Set emissions limits for greenhouse gases only Answer: A Explanation: SIPs detail state-specific strategies to attain and enforce NAAQS. Question 45. Which of the following is the most appropriate method for measuring total mercury in a wastewater effluent? A) Cold vapor atomic absorption spectroscopy (CVAAS) B) UV-visible spectrophotometry C) Flame ionization detection (FID) D) Gas chromatography with an electron capture detector (GC-ECD)
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Answer: A Explanation: CVAAS is the standard method for low-level mercury analysis in water. Question 46. In a Hazardous Waste Manifest, the “DOT” number refers to: A) The Department of Transportation identification for the waste container B) The date of transportation C) The destination of the waste D) The waste’s chemical composition code Answer: A Explanation: The DOT number identifies the certified container used for hazardous waste transport. Question 47. A “fugitive dust” control measure commonly used on unpaved roads is: A) Installing a baghouse B) Applying a water spray or mist system C) Adding a catalytic converter D) Using a wet scrubber Answer: B Explanation: Watering unpaved surfaces suppresses wind-blown dust emissions. Question 48. Which of the following is a common microbial indicator used to assess drinking-water safety? A) Total coliform bacteria B) Lead ions C) Total dissolved solids (TDS)
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A) Grab samples are collected over a 24-hour period B) Composite samples combine multiple grab samples to represent an average concentration C) Grab samples require refrigeration while composites do not D) Composite samples are only used for microbiological analysis Answer: B Explanation: A composite sample aggregates several grabs to provide a time-weighted average. Question 52. Which of the following is an example of a “non-point source” of water pollution? A) A discharge pipe from a municipal wastewater plant B) Runoff from an urban parking lot carrying oil residues C) A landfill leachate collection system D) A factory’s cooling-water discharge Answer: B Explanation: Non-point sources are diffuse, such as runoff from paved surfaces. Question 53. The EPA’s “Tier 2” emission standards for new motor vehicles primarily target reductions in: A) Carbon monoxide (CO) only B) Nitrogen oxides (NOₓ) and non-methane volatile organic compounds (NMVOCs) C) Sulfur dioxide (SO₂) D) Particulate matter (PM₂.₅) only Answer: B
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Explanation: Tier 2 standards set stricter limits for NOₓ and NMVOCs from gasoline and diesel engines. Question 54. Which of the following is the correct order of steps for a typical hazardous-waste waste-minimization hierarchy? A) Reuse → Recycling → Treatment → Disposal B) Treatment → Recycling → Reuse → Disposal C) Disposal → Treatment → Recycling → Reuse D) Recycling → Reuse → Disposal → Treatment Answer: A Explanation: The hierarchy prioritizes source reduction, reuse, recycling, treatment, and finally disposal. Question 55. In a chemical plant, a “process vent” that releases hydrocarbons is best controlled by: A) Installing a baghouse B) Using a thermal oxidizer or flare system C) Adding a wet scrubber for SO₂ removal D) Implementing an electrostatic precipitator Answer: B Explanation: Thermal oxidizers or flares combust vented hydrocarbons, reducing VOC emissions. Question 56. Which of the following is a key indicator used to assess the acidification potential of a water body? A) pH value below 6. B) Dissolved oxygen above 9 mg/L C) Conductivity above 500 μS/cm
