Download PrepIQ NWCA Hazardous Chemicals Pollution and Prevention Ultimate Exam and more Exams Technology in PDF only on Docsity!
Chemicals Pollution and
Prevention Ultimate Exam
Question 1. Which of the following GHS signal words indicates the highest level of hazard? A) Caution B) Notice C) Warning D) Danger Answer: D Explanation: “Danger” is the GHS signal word used for hazards that are more severe than those labeled with “Warning.” Question 2. A chemical that ignites when exposed to an open flame is classified under which physical hazard? A) Corrosivity B) Flammability C) Reactivity D) Explosivity Answer: B Explanation: Flammability describes substances that can catch fire easily; an ignition source such as an open flame triggers this hazard. Question 3. Which GHS pictogram features a flame over a circle? A) Health Hazard B) Oxidizer C) Flammable D) Explosive Answer: B Explanation: The flame over a circle pictogram identifies oxidizers, substances that can cause or enhance the combustion of other materials.
Chemicals Pollution and
Prevention Ultimate Exam
Question 4. In the OSHA Hazard Communication Standard, the “Right to Know” provision primarily ensures that employees receive which of the following? A) Salary information B) Hazardous chemical inventories and SDSs C) Vacation schedules D) Company profit margins Answer: B Explanation: The “Right to Know” guarantees that workers have access to information about hazardous chemicals, including Safety Data Sheets (SDSs). Question 5. According to the Globally Harmonized System, which statement is a precautionary statement? A) “Flammable liquid” B) “Keep away from heat/sparks/open flames” C) “Skull and crossbones” D) “Danger” Answer: B Explanation: Precautionary statements provide measures to minimize or prevent adverse effects; “Keep away from heat/sparks/open flames” is an example. Question 6. Which of the following is NOT one of the four characteristics of hazardous waste defined by the EPA? A) Ignitability B) Corrosivity C) Radioactivity D) Reactivity Answer: C Explanation: The four listed characteristics are ignitability, corrosivity, reactivity, and toxicity; radioactivity is regulated separately.
Chemicals Pollution and
Prevention Ultimate Exam
Question 10. Which engineering control is most effective for containing vapors released during a laboratory procedure? A) Local exhaust ventilation (fume hood) B) General dilution ventilation C) Personal respirator D) Closed-door policy Answer: A Explanation: A fume hood provides localized capture and removal of vapors, reducing worker exposure more effectively than general ventilation. Question 11. A chemical classified as a sensitizer can cause which type of health effect? A) Immediate burns only B) Chronic organ damage only C) Allergic reactions upon repeated exposure D) Acute respiratory failure in a single exposure Answer: C Explanation: Sensitizers may not cause immediate symptoms but can trigger allergic reactions after repeated exposures. Question 12. Which of the following is a correct example of a substitution in the hierarchy of controls? A) Replacing a solvent with water-based alternative B) Installing a fume hood C) Providing gloves to workers D) Posting warning signs Answer: A Explanation: Substitution involves replacing a hazardous material with a less hazardous one, such as using a water-based solvent.
Chemicals Pollution and
Prevention Ultimate Exam
Question 13. The “Danger” signal word must be accompanied by which of the following on a label? A) Only the chemical name B) A GHS pictogram and hazard statements C) Manufacturer’s phone number only D) No additional information required Answer: B Explanation: GHS requires that “Danger” be paired with appropriate pictograms and hazard statements to convey the severity. Question 14. Which of the following waste minimization techniques directly reduces the amount of hazardous waste generated? A) On-site incineration B) Source reduction through process modification C) Off-site disposal to a TSDF D) Use of larger storage drums Answer: B Explanation: Source reduction alters the process to generate less waste, thereby decreasing the volume of hazardous material produced. Question 15. Under the SPCC rule, which of the following facilities is required to develop a Spill Prevention, Control, and Countermeasure plan? A) A small office with no chemicals B) A facility storing >10,000 gallons of oil on-site C) A retail store selling non-hazardous goods D) A residential home Answer: B Explanation: Facilities that store more than 10,000 gallons of oil (or 5,000 gallons if near navigable waters) must have an SPCC plan.
Chemicals Pollution and
Prevention Ultimate Exam
Question 19. Which OSHA standard requires employers to develop a written hazardous communication program? A) 1910. B) 1926. C) 1910. D) 1904. Answer: A Explanation: OSHA Standard 29 CFR 1910.1200 is the Hazard Communication Standard that mandates a written program. Question 20. A chemical labeled with the GHS “Skull and Crossbones” pictogram indicates which type of hazard? A) Acute toxicity (fatal or toxic) B) Corrosivity to metals C) Environmental hazard D) Physical hazard – explosion risk Answer: A Explanation: The skull and crossbones symbol denotes acute toxicity, meaning the substance can cause death or severe health effects. Question 21. Which of the following PPE is most appropriate for protecting against a corrosive liquid splash to the eyes? A) Nitrile gloves B) Safety goggles with indirect venting C) Disposable coveralls D) Hearing protectors Answer: B Explanation: Safety goggles with indirect venting prevent liquid from entering the eyes while allowing airflow, suitable for corrosive splashes.
Chemicals Pollution and
Prevention Ultimate Exam
Question 22. A waste classified as “ignitable” under RCRA must meet which of the following criteria? A) pH less than 2 or greater than 12. B) Flash point below 60 °C (140 °F) C) Contains more than 0.1 mg/L of lead D) Reacts violently with water Answer: B Explanation: Ignitable waste is defined by a flash point below 60 °C (140 °F) or other criteria indicating fire hazard. Question 23. Which of the following statements is true regarding “right to understand” under OSHA’s Hazard Communication Standard? A) Employers must provide chemical inventories in a language the worker understands. B. Employers must conduct monthly safety drills. C) Workers must sign a confidentiality agreement. D) Employers must only provide information in English. Answer: A Explanation: The “right to understand” requires that information be presented in a language and manner that workers can comprehend. Question 24. The most effective method to control exposure to a volatile organic compound (VOC) in a manufacturing area is: A) Providing a respirator to each worker B) Substituting the VOC with a less hazardous material C) Posting a warning sign D) Increasing the room temperature Answer: B Explanation: Substitution removes the hazard at its source, which is the most effective control according to the hierarchy of controls.
Chemicals Pollution and
Prevention Ultimate Exam
Question 28. Which of the following is an example of a “reactive” hazardous waste characteristic? A) pH of 3 B) Flash point of 55 °C c) Forms an explosive mixture with water d) Contains lead above 100 mg/kg Answer: C Explanation: Reactivity includes chemicals that can cause explosions, release toxic gases, or react violently with water or other substances. Question 29. Which OSHA regulation requires the use of secondary containment for bulk storage of hazardous liquids? A) 1910.106 – Flammable liquids B) 1910.1200 – Hazard Communication c) 1910.179 – Forklift operation d) 1910.22 – Walking-working surfaces Answer: A Explanation: OSHA 1910.106 addresses storage requirements, including secondary containment for bulk flammable and combustible liquids. Question 30. The Stockholm Convention is primarily aimed at reducing the release of which type of chemicals? A) Heavy metals B) Persistent organic pollutants (POPs) c) Radioactive isotopes d) Nutrient fertilizers Answer: B Explanation: The Stockholm Convention targets persistent organic pollutants that are resistant to degradation and pose long-term environmental risks.
Chemicals Pollution and
Prevention Ultimate Exam
Question 31. Which of the following best describes an “acute toxicity” effect? A) Cancer development after many years B) Immediate health effects occurring shortly after exposure c) Genetic mutations passed to offspring d) Chronic respiratory disease Answer: B Explanation: Acute toxicity refers to harmful effects that appear quickly after a single or short-term exposure. Question 32. In an SDS, Section 4 includes which type of information? A) First-aid measures b) Physical and chemical properties c) Ecological information d) Transport information Answer: A Explanation: Section 4 of the SDS provides emergency first-aid procedures for exposure incidents. Question 33. Which of the following is the most appropriate administrative control for minimizing exposure to a known carcinogen? A) Rotating workers between tasks to limit time of exposure b) Installing a fume hood c) Providing fire extinguishers d) Using personal protective equipment only Answer: A Explanation: Administrative controls such as job rotation limit the duration each worker is exposed to a carcinogen, reducing cumulative dose.
Chemicals Pollution and
Prevention Ultimate Exam
Question 37. Under RCRA, a waste that meets the definition of “hazardous” must be sent to which type of facility? A) Municipal solid waste landfill b) Treatment, storage, and disposal facility (TSDF) c. Open-pit dumping site d. Composting facility Answer: B Explanation: Hazardous waste must be managed at a TSDF, which is permitted to treat, store, and dispose of hazardous materials safely. Question 38. Which engineering control would be most effective for reducing worker exposure to airborne dust generated during grinding operations? A) Local exhaust ventilation with a high-efficiency filter b. Increasing room temperature c. Providing disposable coveralls d. Posting a “No entry” sign Answer: A Explanation: Local exhaust ventilation captures dust at the source, reducing airborne concentrations and worker inhalation risk. Question 39. Which of the following is a correct example of a precautionary statement for a chemical that reacts violently with water? A. “Do not eat or drink.” b. “Keep away from heat/sparks/open flames.” c. “Avoid release to the environment.” d. “If wet, do not add water.” Answer: D Explanation: The statement “If wet, do not add water” warns users not to introduce water to a material that could react dangerously.
Chemicals Pollution and
Prevention Ultimate Exam
Question 40. A company wishes to replace a toxic solvent with a biodegradable alternative. This action falls under which level of the hierarchy of controls? A) Elimination b) Substitution c) Engineering controls d) PPE Answer: B Explanation: Substitution involves replacing a hazardous chemical with a less hazardous, often more environmentally friendly, alternative. Question 41. Which of the following is a required element on a GHS label? A) Manufacturer’s logo only b) Signal word, pictogram, hazard statement, and precautionary statement c) Only the chemical’s CAS number d) Employee name and badge number Answer: B Explanation: GHS labeling mandates a signal word, appropriate pictograms, hazard statements, and precautionary statements. Question 42. Under the Basel Convention, which of the following activities is prohibited without prior consent? A) Domestic disposal of hazardous waste b) Transboundary movement of hazardous waste c. Recycling within the same country d. Storage in a closed container on-site Answer: B Explanation: The Basel Convention requires prior informed consent for any shipment of hazardous waste across international borders.
Chemicals Pollution and
Prevention Ultimate Exam
Question 46. Which of the following is a key component of a Spill Prevention, Control, and Countermeasure (SPCC) plan? a) Detailed inventory of oil-containing equipment and containers b) List of employee birthdays c. Marketing strategy for the company d. Annual profit report Answer: A Explanation: An SPCC plan must identify all oil-containing equipment and storage to assess spill risks and outline control measures. Question 47. Which of the following best describes “corrosivity” as a physical hazard? A) Ability to ignite spontaneously b) Ability to cause severe skin or metal damage upon contact c. Ability to explode under pressure d. Ability to cause respiratory irritation only Answer: B Explanation: Corrosive substances can destroy living tissue or degrade metals upon contact. Question 48. A waste is considered “reactive” under RCRA if it: A) Has a flash point below 60 °C b) Reacts violently with water or releases toxic gases when disturbed c) Has a pH of 7 d) Is biodegradable Answer: B Explanation: Reactivity includes chemicals that undergo violent reactions, produce toxic gases, or explode when mishandled.
Chemicals Pollution and
Prevention Ultimate Exam
Question 49. Which of the following is a correct method for verifying the fit of a respirator? A) Visual inspection only b) Qualitative fit test using saccharin or Bitrex c. Relying on the manufacturer’s size chart alone d. Asking the worker to guess the fit Answer: B Explanation: Qualitative fit testing (e.g., saccharin or Bitrex) evaluates whether a respirator provides an adequate seal for the wearer. Question 50. Which GHS pictogram is used for chemicals that may cause serious eye damage? A) Health hazard (silhouette with star) b) Exclamation mark c) Corrosion d) Flame over circle Answer: C Explanation: The corrosion pictogram indicates substances that can cause severe skin burns, eye damage, or corrosion of metals. Question 51. Under OSHA’s Hazard Communication Standard, how often must employee training on hazardous chemicals be provided? A) Every 5 years b) Only when a new chemical is introduced c. At the time of initial assignment and whenever new hazards are identified d. Once during onboarding and never again Answer: C Explanation: Training must be given upon initial assignment and updated whenever new chemicals or hazards are added.
Chemicals Pollution and
Prevention Ultimate Exam
Explanation: The PIC procedure applies to chemicals included on the Rotterdam Convention’s PIC list, not to all chemicals. Question 55. Which of the following is an example of a “secondary containment” system? A) A fire extinguisher placed next to a storage tank b) A concrete berm surrounding a chemical storage area c. A warning sign on a door d. A ventilation fan in the ceiling Answer: B Explanation: Secondary containment physically isolates a spill from the environment, such as a concrete berm or a double-walled tank. Question 56. Which of the following hazard statements would be associated with a carcinogenic chemical? A) “May cause respiratory irritation.” b) “May cause cancer.” c. “Flammable liquid and vapor.” d. “Corrosive to metals.” Answer: B Explanation: The hazard statement “May cause cancer” specifically conveys carcinogenic potential. Question 57. Under the EPA’s Toxicity Characteristic Leaching Procedure (TCLP), a waste is classified as toxic if it exceeds the regulatory limit for which of the following metals? A) Sodium b) Lead c. Helium d. Neon
Chemicals Pollution and
Prevention Ultimate Exam
Answer: B Explanation: The TCLP sets leaching limits for metals such as lead, mercury, cadmium, etc.; exceeding these limits classifies the waste as toxic. Question 58. Which of the following is the most appropriate engineering control to prevent the release of a volatile liquid during transfer between containers? A) Using a drip tray only b) Installing a closed-transfer system with a vented pump c. Wearing gloves while transferring d. Posting a “Do not touch” sign Answer: B Explanation: A closed-transfer system isolates the liquid, preventing vapor release and minimizing exposure. Question 59. Which of the following actions is required when a hazardous chemical label is missing or illegible? A) Continue using the chemical without further action b) Immediately replace the label or re-label the container with accurate information c. Transfer the chemical to a new container without labeling d. Dispose of the chemical without documentation Answer: B Explanation: OSHA requires that all containers be properly labeled; missing or illegible labels must be corrected promptly. Question 60. Which of the following best describes a “mutagenic” effect? A) Immediate skin burns b) Genetic alterations that may be passed to future generations c. Chronic respiratory irritation only d. Acute organ failure after a single exposure
