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CHMM (IHMM) practice questions

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Question 1Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Under the OSHA Hazard Communication Standard (29 CFR 1910.1200), which element must appear on a workplace label for a hazardous chemical shipped from a supplier?

  1. Manufacturer's marketing slogan
  2. Recommended disposal vendor and price
  3. Product identifier and hazard statement Correct answer.
  4. Chemical Abstracts Service number and lot code

Explanation

The HCS requires a harmonized label containing the product identifier, hazard statement(s), pictogram(s), signal word, and precautionary statement(s), plus supplier contact information. The product identifier and hazard statement are both mandatory label elements.

Question 2Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility stores 55-gallon drums of a chemical listed as an extremely hazardous substance with a threshold planning quantity of 500 pounds. Which regulatory obligation is triggered first?

  1. Emergency planning notification to the SERC and LEPC Correct answer.
  2. Registration under the Toxic Substances Control Act
  3. Immediate submission of a Tier II inventory report to EPA headquarters
  4. Preparation of a process hazard analysis under PSM

Explanation

Under EPCRA Section 302, a facility that first becomes subject to emergency planning requirements because it exceeds the TPQ for an EHS must notify the State Emergency Response Commission and the Local Emergency Planning Committee. Tier II reporting follows later under Section 312.

Question 3Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which characteristic makes a waste exhibit the toxicity characteristic under RCRA?

  1. The waste corrodes steel at a rate greater than 0.25 inch per year
  2. A leachate from the waste exceeds a regulatory concentration limit in the TCLP Correct answer.
  3. The waste reacts violently with water
  4. The waste ignites at a flash point below 140 degrees Fahrenheit

Explanation

The toxicity characteristic is determined by the Toxicity Characteristic Leaching Procedure, which measures concentrations of specific constituents in leachate against regulatory limits. Ignitability, corrosivity, and reactivity are separate characteristics.

Question 4Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A generator produces 1,500 kg of hazardous waste in a calendar month. Which generator category applies under RCRA?

  1. Large quantity generator Correct answer.
  2. Small quantity generator
  3. Conditionally exempt generator
  4. Very small quantity generator

Explanation

Large quantity generators are those that generate 1,000 kg or more of hazardous waste per calendar month. Small quantity generators fall between 100 and 1,000 kg, and very small quantity generators produce less than 100 kg.

Question 5Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which document must accompany a hazardous waste shipment from a generator to a permitted treatment, storage, and disposal facility?

  1. Waste analysis plan
  2. Uniform Hazardous Waste Manifest Correct answer.
  3. Emergency response plan
  4. Safety Data Sheet

Explanation

The Uniform Hazardous Waste Manifest is the tracking document that follows hazardous waste from the generator through transporters to the receiving facility. It provides the cradle-to-grave record required under RCRA.

Question 6Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Under DOT hazard classification, a material with a flash point of 100 degrees Fahrenheit is best classified as which hazard class?

  1. Class 9 miscellaneous
  2. Class 3 flammable liquid Correct answer.
  3. Class 8 corrosive
  4. Class 2 flammable gas

Explanation

DOT Class 3 covers flammable liquids, generally those with a flash point not more than 60 degrees Celsius (140 degrees Fahrenheit). A flash point of 100 degrees Fahrenheit falls within Class 3.

Question 7Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A container of hazardous waste is accumulating at a large quantity generator site. How long may it remain on site before shipment if it is properly labeled and dated?

  1. 90 days Correct answer.
  2. 270 days
  3. 180 days
  4. 365 days

Explanation

Large quantity generators may accumulate hazardous waste on site for up to 90 days without a permit, provided accumulation requirements such as labeling and dating are met. The 180-day limit applies to small quantity generators.

Question 8Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which hazard is represented by the GHS pictogram showing a flame over a circle?

  1. Acute toxicity
  2. Corrosive materials
  3. Flammable liquids
  4. Oxidizing substances Correct answer.

Explanation

The flame-over-circle pictogram designates oxidizing gases, liquids, and solids. A plain flame pictogram denotes flammables, while a corrosion symbol shows damage to skin or metal.

Question 9Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A worker may enter a permit-required confined space only after which condition is satisfied?

  1. The entrant has signed a waiver of atmospheric monitoring
  2. A coworker remains outside the space with no communication equipment
  3. The space has been occupied for at least one hour without incident
  4. An entry permit has been issued and atmospheric testing confirms acceptable conditions Correct answer.

Explanation

OSHA 1910.146 requires that a permit be issued before entry and that atmospheric conditions be tested and acceptable. Testing for oxygen, flammables, and toxics precedes entry, and monitoring continues while entrants are inside.

Question 10Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which federal statute primarily governs cleanup of releases of hazardous substances at abandoned sites?

  1. Comprehensive Environmental Response, Compensation, and Liability Act Correct answer.
  2. Federal Insecticide, Fungicide, and Rodenticide Act
  3. Clean Air Act
  4. Safe Drinking Water Act

Explanation

CERCLA, commonly called Superfund, authorizes response and cleanup of releases of hazardous substances and assigns liability to responsible parties. The other statutes regulate air, drinking water, and pesticides respectively.

Question 11Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A release of a hazardous substance exceeds the reportable quantity. To which entity must the National Response Center notification be made?

  1. The state governor's office
  2. The facility's insurance carrier
  3. The local chamber of commerce
  4. The National Response Center operated by the federal government Correct answer.

Explanation

CERCLA Section 103 requires immediate notification of the National Response Center when a release of a hazardous substance exceeds its reportable quantity. State and local authorities may also require notification under EPCRA Section 304.

Question 12Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which element is central to a facility's hazard assessment when determining personal protective equipment under OSHA 1910.132?

  1. A written certification of hazard assessment identifying the workplace evaluated Correct answer.
  2. The facility's annual revenue
  3. A list of employee birthdays for scheduling
  4. The number of parking spaces available

Explanation

OSHA requires employers to perform a hazard assessment and certify in writing that the workplace was evaluated and PPE was selected. The certification identifies the workplace, the person certifying, and the date.

Question 13Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A process involves 12,000 pounds of a highly hazardous chemical with a PSM threshold of 10,000 pounds. Which requirement applies?

  1. The chemical must be reclassified as non-hazardous
  2. The process is exempt because it is below 15,000 pounds
  3. A process hazard analysis must be conducted Correct answer.
  4. Only a Tier II report is required

Explanation

When a process contains a highly hazardous chemical at or above the threshold quantity, OSHA's Process Safety Management standard applies, and a process hazard analysis is a core requirement. The PHA evaluates hazards and prior incidents to identify safeguards.

Question 14Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which practice best minimizes the generation of hazardous waste at the source?

  1. Substituting a less hazardous solvent in the cleaning process Correct answer.
  2. Increasing the frequency of drum replacement
  3. Storing waste longer before shipment
  4. Adding absorbent to liquid waste

Explanation

Source reduction through material substitution prevents waste generation rather than managing it after the fact. Waste minimization hierarchy places source reduction above recycling, treatment, and disposal.

Question 15Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A bulk storage tank must be designed to contain the volume of the largest tank plus precipitation from a 25-year, 24-hour storm. Which spill prevention requirement does this describe?

  1. Secondary containment under SPCC rules Correct answer.
  2. Manifesting under RCRA
  3. Emergency planning under EPCRA
  4. Registration under the Clean Air Act

Explanation

SPCC regulations require secondary containment sized to hold the capacity of the largest container plus precipitation from a 25-year, 24-hour storm. This prevents oil discharges from reaching navigable waters.

Question 16Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which gas is commonly used as a surrogate indicator for oxygen deficiency in confined space testing?

  1. Oxygen concentration measured directly with a calibrated meter Correct answer.
  2. Carbon dioxide measured by colorimetric tube only
  3. Methane measured by odor
  4. Nitrogen measured by flame ionization

Explanation

Confined space testing requires direct measurement of oxygen concentration with a calibrated instrument, typically before testing for flammables and toxics. Oxygen deficiency or enrichment is assessed directly rather than inferred.

Question 17Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility handles anhydrous ammonia in quantities above the RMP threshold. Which plan must be developed?

  1. Risk Management Plan submitted to EPA Correct answer.
  2. Resource Conservation and Recovery Act permit
  3. Hazard Communication Program only
  4. Spill Prevention Control and Countermeasure Plan only

Explanation

Facilities with covered processes above threshold quantities of regulated substances must develop and submit a Risk Management Plan under Clean Air Act Section 112(r). The plan addresses hazard assessment, prevention, and emergency response.

Question 18Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which of the following best describes the role of the Local Emergency Planning Committee?

  1. Issuing RCRA permits to treatment facilities
  2. Enforcing OSHA worker safety standards
  3. Registering pesticides under FIFRA
  4. Developing and maintaining a local emergency response plan for hazardous substances Correct answer.

Explanation

Under EPCRA, LEPCs develop emergency response plans for their districts, review them annually, and make information available to the public. Permitting, workplace enforcement, and pesticide registration are handled by other agencies.

Question 19Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A hazardous waste incinerator must achieve a destruction and removal efficiency of 99.99 percent for most organic hazardous constituents. What does this requirement primarily protect?

  1. Human health and the environment from incomplete combustion products Correct answer.
  2. The speed of waste delivery
  3. The profitability of the incinerator operator
  4. The color of the ash residue

Explanation

DRE standards ensure that hazardous organic constituents are destroyed rather than emitted as products of incomplete combustion. This protects air quality and public health near incinerators.

Question 20Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which statement about universal waste is accurate?

  1. It can be disposed of in ordinary trash without restriction
  2. It must be shipped on a hazardous waste manifest in all cases
  3. It is exempt from any labeling requirement
  4. It is subject to streamlined handling requirements in lieu of full hazardous waste rules Correct answer.

Explanation

Universal waste rules streamline management of common hazardous wastes such as batteries, lamps, and mercury devices by reducing paperwork and accumulation requirements. Handlers must still meet labeling and storage standards.

Question 21Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A worker discovers a leaking drum in a storage area. Which initial action is most consistent with an emergency response plan?

  1. Open the drum to relieve pressure
  2. Isolate the area and notify the emergency coordinator Correct answer.
  3. Immediately roll the drum to the loading dock
  4. Mix the spill with a neutralizing agent without PPE

Explanation

The first priority in a release is to protect people by isolating the area and notifying the designated emergency coordinator. Trained responders then assess and control the release.

Question 22Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which exposure control is placed highest in the hierarchy of controls for hazardous chemical work?

  1. Personal protective equipment
  2. Warning signs
  3. Elimination of the hazard Correct answer.
  4. Administrative controls

Explanation

The hierarchy of controls ranks elimination first, followed by substitution, engineering controls, administrative controls, and PPE. Elimination removes the hazard rather than relying on worker behavior or protective equipment.

Question 23Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A waste stream is corrosive because it has a pH of 2.5. Which regulatory threshold defines corrosivity for this characteristic?

  1. pH between 6 and 8
  2. pH less than 5 or greater than 9
  3. pH exactly 7
  4. pH less than or equal to 2 or greater than or equal to 12.5 Correct answer.

Explanation

RCRA corrosivity for aqueous wastes is defined as pH less than or equal to 2 or greater than or equal to 12.5, or the ability to corrode steel at a specified rate. The pH 2.5 value does not itself meet the aqueous corrosivity threshold.

Question 24Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which is a key difference between a hazardous waste and a hazardous material for regulatory purposes?

  1. Hazardous waste is exempt from all DOT rules
  2. Hazardous waste is always a gas
  3. Hazardous waste is a material destined for disposal, while hazardous material is in commerce or use Correct answer.
  4. Hazardous material cannot be flammable

Explanation

Hazardous waste is a solid waste that exhibits a hazardous characteristic or is listed and is destined for disposal or recycling. Hazardous materials are substances in commerce regulated for transportation safety.

Question 25Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

Which training element is required for employees who handle hazardous waste at a large quantity generator facility?

  1. Training provided only to managers
  2. Annual training on waste management procedures and emergency response Correct answer.
  3. Training only at the time of initial hire with no refresher
  4. Training limited to reading the facility newsletter

Explanation

RCRA requires large quantity generators to train personnel in waste management procedures and emergency response, with annual review. Small quantity generators must ensure employees are thoroughly familiar with proper handling.

Question 26Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility stores 6,000 kg of a hazardous chemical in a single warehouse. Under GHS-aligned workplace hazard communication, which document must accompany the chemical and be available to workers in their language?

  1. A process hazard analysis report
  2. A safety data sheet in the required 16-section format Correct answer.
  3. A DOT shipping paper retained for one year
  4. A hazardous waste manifest signed by the transporter

Explanation

GHS-aligned hazard communication requires that each hazardous chemical be accompanied by a safety data sheet organized into 16 standardized sections, and that workers be able to access it. The SDS communicates hazards, handling, and emergency measures. Shipping papers, manifests, and PHA reports serve different regulatory purposes.

Question 27Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A hazardous waste storage area holds 30 drums of ignitable waste. Which accumulation standard applies to the containers under RCRA for a large quantity generator?

  1. Containers must be vented continuously to prevent pressure buildup
  2. Containers must be labeled only after 90 days of accumulation
  3. Containers must be stored outdoors on an impermeable pad at all times
  4. Containers must be closed except when adding or removing waste and inspected weekly Correct answer.

Explanation

RCRA container management requires that containers be kept closed except when waste is added or removed, be in good condition, and be inspected at least weekly for leaks and deterioration. Labeling with accumulation start date and hazard indicators is required from the start of accumulation.

Question 28Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A generator produces 1,500 kg per month of hazardous waste. Which generator category applies under RCRA?

  1. Small quantity generator
  2. Large quantity generator Correct answer.
  3. Very small quantity generator
  4. Conditionally exempt generator

Explanation

A large quantity generator generates 1,000 kg or more per month of hazardous waste (or more than 1 kg of acutely hazardous waste). At 1,500 kg per month the facility exceeds the SQ G threshold of 100 kg but less than 1,000 kg.

Question 29Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must determine whether a solid waste exhibits the toxicity characteristic. Which procedure is used?

  1. Corrosivity testing by steel coupon immersion
  2. pH measurement of the undiluted waste
  3. Flash point determination by closed-cup method
  4. Toxicity characteristic leaching procedure on a representative sample Correct answer.

Explanation

The toxicity characteristic is determined using the toxicity characteristic leaching procedure, which measures leaching of specific contaminants against regulatory limits. Flash point, pH, and coupon testing address ignitability and corrosivity, not toxicity.

Question 30Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility handles 15,000 lb of a regulated flammable substance in a process. Under PSM, which element requires the facility to evaluate what could go wrong and how severe the consequences could be?

  1. Pre-startup safety review
  2. Management of change
  3. Process hazard analysis Correct answer.
  4. Incident investigation

Explanation

The process hazard analysis is the PSM element that systematically identifies and evaluates hazards and consequences of a covered process. Pre-startup safety review confirms new or modified equipment is safe to start, management of change controls modifications, and incident investigation examines events after they occur.

Question 31Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A hazardous waste incinerator burns waste containing dioxins. Which operating parameter must be continuously monitored and maintained to ensure adequate destruction?

  1. Stack opacity only during daylight
  2. Combustion chamber temperature Correct answer.
  3. Feed rate of packaging material
  4. Ambient wind direction

Explanation

Hazardous waste incinerators must maintain minimum combustion chamber temperatures and continuously monitor temperature to ensure complete destruction of organics. Monitoring of feed rate, waste feed cut-off, and afterburner temperature are also required. Wind direction and daylight opacity are not compliance parameters.

Question 32Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility generates spent solvent that is listed as hazardous waste. Which document must accompany the shipment from the generator to the treatment, storage, and disposal facility?

  1. A safety data sheet
  2. A uniform hazardous waste manifest Correct answer.
  3. A bill of lading only
  4. A Tier II inventory report

Explanation

The uniform hazardous waste manifest tracks hazardous waste from the point of generation to the point of ultimate disposal and must accompany the shipment. It is signed by the generator, transporter, and receiving facility to establish the chain of custody.

Question 33Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must prepare a Tier II report. Which information is central to that submission?

  1. Employee exposure monitoring results
  2. Waste minimization progress reports
  3. Groundwater monitoring data
  4. Quantities and locations of hazardous chemicals stored on site Correct answer.

Explanation

Tier II reporting under EPCRA requires facilities to report hazardous chemical inventories, including quantities, locations, and hazard categories, to state and local emergency planning authorities. Exposure monitoring, waste minimization, and groundwater data serve other programs.

Question 34Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A worker must handle a corrosive liquid with a splash hazard. Which control is most appropriate as the last line of defense?

  1. Substitution with a less corrosive chemical
  2. Administrative controls such as rotating workers
  3. Personal protective equipment such as a face shield and apron Correct answer.
  4. Engineering controls such as local exhaust ventilation

Explanation

In the hierarchy of controls, personal protective equipment is the last line of defense and least reliable because its effectiveness depends on correct selection, fit, and use. Engineering controls, substitution, and administrative controls rank higher.

Question 35Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility stores flammable liquids in a cabinet. Which practice best reduces the risk of ignition from static electricity during dispensing?

  1. Increasing the dispensing flow rate
  2. Using plastic funnels for all transfers
  3. Bonding and grounding the container and receiving vessel Correct answer.
  4. Storing the cabinet near a heat source

Explanation

Bonding and grounding equalize electrical potential between containers and the receiving vessel, preventing static discharge that could ignite flammable vapors. Higher flow rates, plastic funnels, and proximity to heat increase ignition risk.

Question 36Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility uses a toxic gas in a process. Which detection approach provides early warning of a release in the work area?

  1. Visual inspection of piping once per shift
  2. Fixed gas detection with alarms interlocked to ventilation Correct answer.
  3. Periodic odor checks by workers
  4. Annual manual sampling of the room air

Explanation

Fixed gas detection with alarms interlocked to ventilation provides continuous monitoring and automatic response to a release. Manual sampling, visual inspection, and odor checks are intermittent and unreliable for toxic gases.

Question 37Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must respond to a spill of a hazardous chemical. Which element is essential in a written emergency response plan?

  1. Procedures for evacuation, notification, and decontamination Correct answer.
  2. A list of employee performance reviews
  3. A schedule of marketing events
  4. The facility's annual budget

Explanation

Emergency response plans must address pre-emergency planning, personnel roles, emergency recognition, evacuation routes, decontamination, and medical treatment. Performance reviews, marketing, and budget information are unrelated to response planning.

Question 38Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must determine whether a waste is a characteristic hazardous waste. Which characteristic is defined by a flash point below 60 degrees Celsius?

  1. Ignitability Correct answer.
  2. Toxicity
  3. Corrosivity
  4. Reactivity

Explanation

Ignitability is the characteristic defined by a flash point below 60 degrees Celsius for liquids, among other criteria. Corrosivity concerns pH and metal corrosion, reactivity concerns instability and violent reaction, and toxicity concerns leaching of contaminants.

Question 39Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must reduce the volume of hazardous waste it ships. Which approach is most consistent with the waste management hierarchy?

  1. Process modification that reduces solvent use at the source Correct answer.
  2. Dilution of waste with water
  3. Land disposal of untreated waste
  4. Long-term on-site storage

Explanation

Source reduction through process modification is the preferred approach in the waste management hierarchy. Land disposal, dilution, and long-term storage do not reduce hazard or volume and may violate treatment standards.

Question 40Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must characterize a waste that reacts violently with water. Which waste characteristic applies?

  1. Ignitability
  2. Toxicity
  3. Corrosivity
  4. Reactivity Correct answer.

Explanation

Reactivity covers wastes that are normally unstable, react violently with water, form potentially explosive mixtures, or generate toxic gases. Ignitability, corrosivity, and toxicity are separate characteristics with different test criteria.

Question 41Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility stores drums of hazardous waste outdoors. Which containment requirement applies to the storage area under RCRA?

  1. A gravel pad
  2. A roof only
  3. A perimeter fence
  4. A containment system with capacity to hold the volume of the largest container plus precipitation Correct answer.

Explanation

Containment systems for container storage areas must be designed to hold the volume of the largest container and, where precipitation can enter, the precipitation from a 25-year, 24-hour storm event. Roofs, gravel pads, and fences alone do not satisfy containment requirements.

Question 42Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must determine whether a material is a DOT hazardous material. Which factor is central to that determination?

  1. Whether the material is listed in an SDS
  2. Whether the material is generated as a waste
  3. Whether the material meets a hazard class definition and is offered for transportation Correct answer.
  4. Whether the material is stored on site

Explanation

DOT hazardous material classification depends on whether the material meets a hazard class definition and is offered for transportation in commerce. Storage, waste status, and SDS listing alone do not determine DOT classification.

Question 43Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must prepare a risk management plan under the Clean Air Act. Which element is required in that plan?

  1. A facility landscaping plan
  2. Hazard assessment, prevention program, and emergency response program Correct answer.
  3. An employee stock ownership plan
  4. A marketing strategy

Explanation

An RMP must include a hazard assessment, a prevention program, and an emergency response program. Marketing, stock ownership, and landscaping are unrelated to chemical accident prevention.

Question 44Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must train employees who handle hazardous waste. Which training element is required for large quantity generators?

  1. Training on marketing techniques
  2. Annual training on waste handling and emergency procedures Correct answer.
  3. Training only at the time of hire
  4. Training on financial reporting

Explanation

Large quantity generators must provide annual training to employees handling hazardous waste, covering proper handling and emergency procedures, and must document the training. One-time training at hire, marketing, and financial reporting do not meet the requirement.

Question 45Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must respond to a hazardous materials release. Which action is most consistent with the incident command system?

  1. Waiting for media guidance before acting
  2. Allowing each department to respond independently
  3. Establishing a single incident commander and clear span of control Correct answer.
  4. Assigning response duties only after the release ends

Explanation

The incident command system establishes a single incident commander, clear chain of command, and manageable span of control to coordinate response. Independent departmental action, waiting for media guidance, and post-release task assignment undermine coordinated response.

Question 46Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must determine whether a substance is an extremely hazardous substance under EPCRA. Which criterion applies?

  1. Any material stored in a warehouse
  2. Appearance on the EHS list with a reportable quantity and threshold planning quantity Correct answer.
  3. Any material transported by rail
  4. Any material with an SDS

Explanation

EPCRA's extremely hazardous substance list identifies specific chemicals with threshold planning quantities and reportable quantities. General SDS presence, warehouse storage, or rail transport do not establish EHS status.

Question 47Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must evaluate a chemical for carcinogenicity under GHS. Which hazard class applies?

  1. Skin corrosion
  2. Acute toxicity
  3. Flammability
  4. Carcinogenicity Correct answer.

Explanation

GHS classifies carcinogenicity as a health hazard class distinct from acute toxicity, skin corrosion, and physical hazards such as flammability. Each class has its own criteria and hazard statements.

Question 48Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must determine whether a waste is corrosive. Which criterion defines corrosivity for a liquid waste?

  1. pH of 2 or less or 12.5 or more Correct answer.
  2. Ability to react with water
  3. Flash point below 60 degrees Celsius
  4. pH between 6 and 8

Explanation

Corrosivity for liquid waste is defined by a pH of 2 or less or 12.5 or more, or the ability to corrode steel at a specified rate. Flash point and water reactivity define ignitability and reactivity, respectively.

Question 49Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must prepare for a potential release of chlorine gas. Which protective action is most appropriate for the surrounding community?

  1. Shelter-in-place or evacuation based on plume modeling Correct answer.
  2. Ignoring the release until odor is detected
  3. Gathering outdoors near the facility
  4. Opening windows to ventilate buildings

Explanation

Protective actions for a toxic gas release are selected using plume modeling and may include shelter-in-place or evacuation. Opening windows, gathering outdoors near the source, and waiting for odor increase exposure.

Question 50Hazardous materials management (CHMM blueprint domains; official names and weights not enumerated in source)

A facility must determine whether a process is covered by PSM. Which criterion applies?

  1. The process involves a highly hazardous chemical at or above its threshold quantity Correct answer.
  2. The process involves only office supplies
  3. The process involves any chemical in any quantity
  4. The process involves only water

Explanation

PSM coverage is triggered when a process involves a highly hazardous chemical at or above its threshold quantity, or certain flammable liquids or gases in specified quantities. Any chemical or water alone does not trigger coverage.