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Sample Practice Questions

Try these 10 sample questions from the Core Exam practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

  1. 1When should an applicator first read a pesticide label for a planned use?

    1. A. Before buying the product
    2. B. When opening it for the first mixing operation
    3. C. After loading but immediately before the first application
    4. D. During cleanup before placing it into storage

    Answer: A

    Explanation: The Core Manual specifically says, “Before buying the pesticide.” Reading then confirms that the intended site and use are allowed and reveals equipment and PPE needs.

    Reference: National Pesticide Applicator Certification Core Manual — Chapter 3, p. 34, When to Read the Pesticide Label

  2. 2Which relationship best describes pesticide risk for an applicator?

    1. A. Risk depends on toxicity and application rate
    2. B. Risk depends on toxicity and exposure
    3. C. Risk depends on persistence and adsorption
    4. D. Risk depends on pest density and efficacy

    Answer: B

    Explanation: The Core Manual says risk considers “toxicity and exposure.” Even a highly toxic product presents less risk when exposure is effectively prevented.

    Reference: National Pesticide Applicator Certification Core Manual — Chapter 5, Pesticide Hazards and First Aid, Risk

  3. 3Which list contains the four broad groups commonly used to organize pests?

    1. A. Weeds, microorganisms, arthropods, and rodents
    2. B. Plants, insects, diseases, and wildlife
    3. C. Weeds, invertebrates, pathogens, and vertebrates
    4. D. Plants, animals, fungi, and bacteria

    Answer: C

    Explanation: The Core Manual states there are “four main groups of pest organisms.” Its listed groups are weeds, invertebrates, pathogens, and vertebrates, matching option C.

    Reference: National Pesticide Applicator Certification Core Manual — Chapter 1, Identifying Pests

  4. 4What does pesticide persistence describe in the environment after application?

    1. A. How quickly the spray leaves the nozzle
    2. B. How long the pesticide remains active before breaking down
    3. C. How tightly PPE fits
    4. D. How many pests are present

    Answer: B

    Explanation: The Core Manual defines persistence as the ability to “remain present and active.” It describes how long the pesticide persists before breaking down.

    Reference: National Pesticide Applicator Certification Core Manual — Chapter 7, Pesticide Behavior in the Environment, Persistence

  5. 5In an IPM program, what is an action threshold?

    1. A. The pest level where economic loss equals control cost
    2. B. The interval selected between routine pest-monitoring visits
    3. C. The pest level at which management action should be taken
    4. D. The pest level that remains acceptable without management action

    Answer: C

    Explanation: EPA states that IPM “sets an action threshold.” It is the pest or environmental level at which control action must be taken.

    Reference: Integrated Pest Management (IPM) Principles | US EPA — Set Action Thresholds

  6. 6Which scope accurately states Maine's prohibition on using unregistered pesticides?

    1. A. It applies only to unregistered restricted-use pesticides
    2. B. It applies to any unregistered pesticide except as otherwise specifically provided
    3. C. It applies only to unregistered pesticides used on agricultural land
    4. D. It applies only to unregistered pesticides used for commercial applications

    Answer: B

    Explanation: Maine Chapter 20 addresses a pesticide “not registered by the Maine Board of Pesticides Control” and prohibits its use except as otherwise provided. Private property creates no general exception.

    Reference: Maine Rule Chapter 20 — 01-026 C.M.R. ch. 20, § 1(B)

  7. 7Which site is most vulnerable to groundwater contamination by a mobile pesticide?

    1. A. Shallow groundwater beneath fine-textured, high-organic soil
    2. B. Shallow groundwater beneath highly permeable, low-organic soil
    3. C. Deep groundwater beneath highly permeable, low-organic soil
    4. D. Deep groundwater beneath fine-textured, high-organic soil

    Answer: B

    Explanation: The Core Manual identifies “shallow groundwater” as a vulnerability. Combined with permeable, low-organic soil, it presents the greatest listed leaching risk.

    Reference: National Pesticide Applicator Certification Core Manual — Chapter 7, Groundwater Protection

  8. 8Spray droplets move through the air beyond the target during application. What type of off-target movement is this?

    1. A. Leaching
    2. B. Runoff
    3. C. Spray drift
    4. D. Adsorption

    Answer: C

    Explanation: The Core Manual states, “Spray drift refers”. It then defines that term as off-target pesticide movement during a liquid application, matching the described droplets.

    Reference: National Pesticide Applicator Certification Core Manual — Chapter 7, Pesticide Movement, Drift

  9. 9Which is a possible long-term effect of repeated off-target pesticide contamination?

    1. A. Reduced reproduction or vigor in exposed nontarget populations
    2. B. Immediate eye irritation after a single splash
    3. C. An acute fish kill immediately after a spill
    4. D. A one-time leaf burn after direct spray contact

    Answer: A

    Explanation: EPA evaluates “short- and long-term responses” in nontarget organisms. Reduced reproduction or vigor is a long-term response; the other choices are acute effects.

    Reference: Factsheet on Ecological Risk Assessment for Pesticides | US EPA — Wildlife/Plant Toxicity

  10. 10Which action best reflects integrated pest management stewardship?

    1. A. Apply on a fixed calendar regardless of pest levels
    2. B. Use monitoring and thresholds to choose an effective, least-risk control
    3. C. Use the highest labeled rate for every infestation
    4. D. Eliminate all nonchemical controls

    Answer: B

    Explanation: EPA’s IPM principles state, “Effective, less risky pest controls are chosen first.” Monitoring and thresholds identify when control is needed before selecting that method.

    Reference: Integrated Pest Management (IPM) Principles | US EPA — How do IPM programs work?

Topics in this practice bank

These topics describe the available practice for Core Exam. Review the examination outline and its sources for scope and allocation details.

  • Label and labeling comprehension
    • The general format and terminology of pesticide labels and labeling.
    • Understanding instructions, warnings, terms, symbols, and other information commonly appearing on pesticide labels and labeling.
    • Understanding that it is a violation of Federal law to use any registered pesticide in a manner inconsistent with its labeling.
    • Understanding when a certified applicator must be physically present at the site of the application based on labeling requirements.
    • Understanding labeling requirements for supervising noncertified applicators working under the direct supervision of a certified applicator.
    • Understanding that applicators must comply with all use restrictions and directions for use contained in pesticide labels and labeling, including being certified in the appropriate category to use restricted use pesticides for fumigation or aerial application, or predator control devices containing sodium cyanide or sodium fluoroacetate, if applicable.
    • Understanding the meaning of product classification as either general or restricted use, and that a product may be unclassified.
    • Understanding and complying with product-specific notification requirements.
    • Recognizing and understanding the difference between mandatory and advisory labeling language.
    • The general format and terminology of pesticide labels and labeling.
    • Understanding instructions, warnings, terms, symbols, and other information commonly appearing on pesticide labels and labeling.
    • Understanding that it is a violation of Federal law to use any registered pesticide in a manner inconsistent with its labeling.
    • Understanding labeling requirements that a certified applicator must be physically present at the site of the application.
    • Understanding labeling requirements for supervising noncertified applicators working under the direct supervision of a certified applicator.
    • Understanding that applicators must comply with all use restrictions and directions for use contained in pesticide labels and labeling, including being certified in the certification category appropriate to the type and site of the application.
    • Understanding the meaning of product classification as either general or restricted use and that a product may be unclassified.
    • Understanding and complying with product-specific notification requirements.
    • Recognizing and understanding the difference between mandatory and advisory labeling language.
  • Safety
    • Understanding the different natures of the risks of acute toxicity and chronic toxicity, as well as the long-term effects of pesticides.
    • Understanding that a pesticide's risk is a function of exposure and the pesticide's toxicity.
    • Recognition of likely ways in which dermal, inhalation, and oral exposure may occur.
    • Common types and causes of pesticide mishaps.
    • Precautions to prevent injury to applicators and other individuals in or near treated areas.
    • Need for, and proper use of, protective clothing and personal protective equipment.
    • Symptoms of pesticide poisoning.
    • First aid and other procedures to be followed in case of a pesticide mishap.
    • Proper identification, storage, transport, handling, mixing procedures, and disposal methods for pesticides and used pesticide containers, including precautions to be taken to prevent children from having access to pesticides and pesticide containers.
    • Understanding the different natures of the risks of acute toxicity and chronic toxicity, as well as the long-term effects of pesticides.
    • Understanding that a pesticide's risk is a function of exposure and the pesticide's toxicity.
    • Recognition of likely ways in which dermal, inhalation, and oral exposure may occur.
    • Common types and causes of pesticide mishaps.
    • Precautions to prevent injury to applicators and other individuals in or near treated areas.
    • Need for, and proper use of, protective clothing and personal protective equipment.
    • Symptoms of pesticide poisoning.
    • First aid and other procedures to be followed in case of a pesticide mishap.
    • Proper identification, storage, transport, handling, mixing procedures, and disposal methods for pesticides and used pesticide containers, including precautions to be taken to prevent children from having access to pesticides and pesticide containers.
  • Environment
    • Weather and other climatic conditions.
    • Types of terrain, soil, or other substrate.
    • Presence of fish, wildlife, and other non-target organisms.
    • Drainage patterns.
    • Weather and other indoor and outdoor climatic conditions.
    • Types of terrain, soil, or other substrate.
    • Presence of fish, wildlife, and other non-target organisms.
    • Drainage patterns.
  • Pests
    • The importance of correctly identifying target pests and selecting the proper pesticide product(s).
    • Verifying that the labeling does not prohibit the use of the product to control the target pest(s).
    • The importance of correctly identifying target pests and selecting the proper pesticide product(s) for effective pest control.
    • Verifying that the labeling does not prohibit the use of the product to control the target pest(s).
  • Pesticides
    • Types of pesticides.
    • Types of formulations.
    • Compatibility, synergism, persistence, and animal and plant toxicity of the formulations.
    • Hazards and residues associated with use.
    • Factors that influence effectiveness or lead to problems such as pesticide resistance.
    • Dilution procedures.
    • Types of pesticides.
    • Types of formulations.
    • Compatibility, synergism, persistence, and animal and plant toxicity of the formulations.
    • Hazards and residues associated with use.
    • Factors that influence effectiveness or lead to problems such as pesticide resistance.
    • Dilution procedures.
  • Equipment
    • Types of equipment and advantages and limitations of each type.
    • Uses, maintenance, and calibration procedures.
    • Types of equipment and advantages and limitations of each type.
    • Use, maintenance, and calibration procedures.
  • Application methods
    • Methods used to apply various forms and formulations of pesticides.
    • Knowledge of which application method to use in a given situation and that use of a fumigant, aerial application, or predator control device containing sodium cyanide or sodium fluoroacetate requires additional certification.
    • How selection of application method and use of a pesticide may result in proper use, unnecessary or ineffective use, and misuse.
    • Prevention of drift and pesticide loss into the environment.
    • Methods used to apply various forms and formulations of pesticides.
    • Knowledge of which application method to use in a given situation and that use of a fumigant, aerial application, sodium cyanide, or sodium fluoroacetate requires additional certification.
    • How selection of application method and use of a pesticide may result in proper use, unnecessary or ineffective use, and misuse.
    • Prevention of drift and pesticide loss into the environment.
  • Laws and regulations
    • Laws and regulations. Knowledge of all applicable State, Tribal, and Federal laws and regulations, including understanding the Worker Protection Standard in 40 CFR part 170 and the circumstances where compliance is required.
    • Laws and regulations. Knowledge of all applicable State, Tribal, and Federal laws and regulations.
  • Responsibilities for supervisors of noncertified applicators
    • Understanding and complying with requirements in § 171.201 of this part for private applicators who supervise noncertified applicators using restricted use pesticides.
    • Providing use-specific instructions to noncertified applicators using restricted use pesticides under the direct supervision of a certified applicator.
    • Explaining appropriate State, Tribal, and Federal laws and regulations to noncertified applicators working under the direct supervision of a certified applicator.
    • Understanding and complying with requirements in § 171.201 of this part for certified commercial applicators who supervise noncertified applicators using restricted use pesticides.
    • The recordkeeping requirements of pesticide safety training for noncertified applicators who use restricted use pesticides under the direct supervision of a certified applicator.
    • Providing use-specific instructions to noncertified applicators using restricted use pesticides under the direct supervision of a certified applicator.
    • Explaining pertinent State, Tribal, and Federal laws and regulations to noncertified applicators who use restricted use pesticides under the direct supervision of a certified applicator.
  • Stewardship
    • Maintaining chemical security for restricted use pesticides.
    • How to communicate information about pesticide exposures and risks with agricultural workers and handlers and other persons.
  • Agricultural pest control
    • Specific pests of relevant agricultural commodities.
    • How to avoid contamination of ground and surface waters.
    • Understanding pre-harvest and restricted entry intervals and entry-restricted periods and areas.
    • Understanding specific pesticide toxicity and residue potential when pesticides are applied to animal or animal product agricultural commodities.
    • Relative hazards associated with using pesticides on animals or places in which animals are confined based on formulation, application technique, age of animal, stress, and extent of treatment.
  • Control of pesticide drift to non-target areas
  • Proper meteorological conditions for the application of pesticides
  • Potential adverse effect of pesticides on plants, animals or humans
  • Professionalism
    • Maintaining chemical security for restricted use pesticides.
    • How to communicate information about pesticide exposures and risks with customers and the public.
    • Appropriate product stewardship for certified applicators.

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These are independent study questions, not actual examination items. For examination requirements and official information, view Core Exam details.