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Pesticide applicator commercial applicator categories and certification practice questions

20 free practice questions from 40 CFR 171.101 and 171.103. Each answer is explained and linked to the rule it comes from.

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Pesticide applicator commercial applicator categories and certification

20 questions across 7 topics. After each answer you see why it is right, with a link to the official source.

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Commercial categories by site and setting

  1. 1. A commercial applicator applies restricted use pesticides to seeds. Under 171.101(d), where must that use take place for the seed treatment category to apply?

    • A. In forest nurseries and forest seed production areas
    • B. In seed treatment facilities
    • C. Only on the farm where the seed will be planted
    • D. Only at a dealership that sells the seed
    Show answer

    Answer: B. In seed treatment facilities

    Seed treatment "applies to commercial applicators using or supervising the use of restricted use pesticides on seeds in seed treatment facilities." Forest nurseries and forest seed production belong to forest pest control in 171.101(b).

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

  2. 2. An applicator certified only in livestock pest control wants to buy and use sodium fluoroacetate livestock protection collars. What does 171.101(a)(2) say about that certification?

    • A. It authorizes the use as long as the applicator is at least 18 years old
    • B. It authorizes use on livestock the applicator owns, but not on others' livestock
    • C. It authorizes supervising others' use, but not using the product personally
    • D. It alone is not sufficient to authorize the purchase, use, or supervision of use of those predator control products
    Show answer

    Answer: D. It alone is not sufficient to authorize the purchase, use, or supervision of use of those predator control products

    171.101(a)(2) says "Certification in this category alone is not sufficient to authorize the purchase, use, or supervision of use of products for predator control listed in paragraphs (k) and (l) of this section."

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

  3. 3. The aquatic pest control category covers restricted use pesticides purposefully applied to standing or running water. Which applicators does 171.101(e) exclude from it?

    • A. Applicators engaged in public health related activities included in the public health pest control category
    • B. Applicators applying to running water rather than standing water
    • C. Applicators applying to ponds on private land
    • D. Applicators who are governmental employees
    Show answer

    Answer: A. Applicators engaged in public health related activities included in the public health pest control category

    The aquatic category covers "any restricted use pesticide purposefully applied to standing or running water, excluding applicators engaged in public health related activities" in paragraph (h).

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

  4. 4. The crop pest control category in 171.101(a)(1) covers use of restricted use pesticides in production of agricultural commodities. Besides crops such as grains, vegetables and tree fruits, which lands does its list of examples name?

    • A. Forests and forest nurseries
    • B. Golf course turf and ornamental plantings
    • C. Feed and forage crops including grasslands, and non-crop agricultural lands
    • D. Railway rights-of-way
    Show answer

    Answer: C. Feed and forage crops including grasslands, and non-crop agricultural lands

    Crop pest control covers production of agricultural commodities, "including but not limited to grains, vegetables, small fruits, tree fruits, peanuts, tree nuts, tobacco, cotton, feed and forage crops including grasslands, and non-crop agricultural lands." Forests, turf and rights-of-way have their own categories in 171.101(b), (c) and (f).

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

Categories for government programs, research, predator control, fumigation and aerial use

  1. 5. Under 171.101(h), to whom does the public health pest control category apply?

    • A. Any commercial applicator who treats human dwellings
    • B. Private applicators protecting their own households
    • C. State, Tribal, Federal or other governmental employees and contractors using restricted use pesticides in government-sponsored public health programs
    • D. Extension specialists who demonstrate pesticide use to the public
    Show answer

    Answer: C. State, Tribal, Federal or other governmental employees and contractors using restricted use pesticides in government-sponsored public health programs

    The category "applies to State, Tribal, Federal or other governmental employees and contractors who use or supervise the use of restricted use pesticides in government-sponsored public health programs."

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

  2. 6. An extension agent does not apply restricted use pesticides personally but supervises a public demonstration of their proper use and application techniques. What does 171.101(j) say about the demonstration and research category?

    • A. It applies to individuals who demonstrate to the public the proper use and techniques of application of restricted use pesticides or supervise such demonstration
    • B. It applies only to persons who personally apply restricted use pesticides during a demonstration
    • C. It applies only to persons conducting field research, not to demonstrations
    • D. It applies only to State and Federal employees, not to commercial representatives
    Show answer

    Answer: A. It applies to individuals who demonstrate to the public the proper use and techniques of application of restricted use pesticides or supervise such demonstration

    171.101(j): the category "applies to individuals who demonstrate to the public the proper use and techniques of application of restricted use pesticides or supervise such demonstration" and to persons conducting field research. It includes "extension specialists and county agents, commercial representatives demonstrating restricted use pesticide products".

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

  3. 7. Under 171.101(i), the regulatory pest control category applies to governmental employees and contractors who use or supervise the use of restricted use pesticides in government-sponsored programs for what purpose?

    • A. The management and control of pests having medical and public health importance
    • B. The control of regulated pests
    • C. Demonstrating the proper use of restricted use pesticides to the public
    • D. Field research involving restricted use pesticides
    Show answer

    Answer: B. The control of regulated pests

    171.101(i) covers employees and contractors "who use or supervise the use of restricted use pesticides in government-sponsored programs for the control of regulated pests." Programs for pests of medical and public health importance fall under public health pest control in 171.101(h).

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

  4. 8. A commercial applicator, working from the ground, will use a restricted use pesticide to fumigate a sealed shipping container of stored goods. Which of these 171.101 certification categories covers that use?

    • A. Soil fumigation
    • B. Seed treatment
    • C. Aerial pest control
    • D. Non-soil fumigation
    Show answer

    Answer: D. Non-soil fumigation

    171.101(n): non-soil fumigation "applies to commercial applicators who use or supervise the use of a restricted use pesticide to fumigate anything other than soil." Soil fumigation in 171.101(m) covers use "to fumigate soil", and aerial pest control covers pesticides "applied by fixed or rotary wing aircraft."

    Source: eCFR: 40 CFR 171.101, Commercial applicator certification categories (as of Nov 4, 2026)

Examination standards

  1. 9. Under 171.103(a)(2)(vi), commercial applicator examinations must be kept secure so that who has access to the examination, and when?

    • A. The candidates and their employers, at any time
    • B. Only the candidates, and only in the presence of the proctor
    • C. Any certified applicator, after the examination period
    • D. The candidates, alone, during breaks in the examination
    Show answer

    Answer: B. Only the candidates, and only in the presence of the proctor

    Examinations "must be kept secure before, during, and after the examination period so that only the candidates have access to the examination, and candidates have access only in the presence of the proctor."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  2. 10. Under 171.103(a)(2)(ii), who may proctor a commercial applicator examination?

    • A. Any certified commercial applicator in the category being tested
    • B. The candidate's employer or supervisor
    • C. Any EPA employee, without designation by the certifying authority
    • D. An individual designated by the certifying authority who is not seeking certification at that session
    Show answer

    Answer: D. An individual designated by the certifying authority who is not seeking certification at that session

    The examination "must be proctored by an individual designated by the certifying authority and who is not seeking certification at any examination session that he or she is proctoring."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  3. 11. During a commercial applicator examination, the proctor sees a candidate attempting to copy the examination. Under 171.103(a)(2)(xi), to whom does the proctor report it?

    • A. The certifying authority
    • B. The candidate's employer
    • C. The registrant of the pesticide named in the examination
    • D. Local law enforcement
    Show answer

    Answer: A. The certifying authority

    "The proctor reports to the certifying authority any examination administration inconsistencies or irregularities, including but not limited to cheating, use of unauthorized materials, and attempts to copy or retain the examination."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  4. 12. A candidate wants to use a personal copy of a pesticide label during a commercial applicator examination. Which reference materials does 171.103(a)(2)(ix) allow during the examination?

    • A. Any materials the candidate brings, once the proctor has inspected them
    • B. Only those approved by the certifying authority and provided and collected by the proctor
    • C. Any pesticide labeling, because labels are public documents
    • D. Any materials the candidate's employer has approved
    Show answer

    Answer: B. Only those approved by the certifying authority and provided and collected by the proctor

    "The only reference materials used during the examination are those that are approved by the certifying authority and provided and collected by the proctor."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  5. 13. Under 171.103(a)(2)(vii), with whom may a candidate have verbal or non-verbal communication during a commercial applicator examination period?

    • A. Other candidates, about examination procedures only
    • B. Their employer, by phone during breaks
    • C. Only the proctor
    • D. Any certified applicator present in the room
    Show answer

    Answer: C. Only the proctor

    "Candidates must not have verbal or non-verbal communication with anyone other than the proctor during the examination period."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

Determining competency and minimum age

  1. 14. Besides a passing score on a written examination that meets the 171.103(a)(2) standards, what must a commercial applicator also pass to be determined competent under 171.103(a)?

    • A. Any related performance testing that is required by the State, Tribe, or Federal agency
    • B. An oral examination given by EPA
    • C. A supervised work period of 12 months
    • D. A refresher course from the pesticide manufacturer
    Show answer

    Answer: A. Any related performance testing that is required by the State, Tribe, or Federal agency

    The applicator "must receive a passing score on a written examination that meets the standards specified in paragraph (a)(2) of this section and any related performance testing that is required by the State, Tribe, or Federal agency."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  2. 15. A certifying authority wants to add performance testing as an additional method of determining commercial applicator competency. Under 171.103(b), where must that method be specified?

    • A. In the labeling of each pesticide used in the test
    • B. In a notice EPA publishes for each test session
    • C. In the certifying authority's Agency-approved certification plan
    • D. On each applicator's certification credential
    Show answer

    Answer: C. In the certifying authority's Agency-approved certification plan

    171.103(b) says "Any such additional methods must be specified in the certifying authority's Agency-approved certification plan and must comply with the applicable standards in paragraph (a) of this section."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  3. 16. A person seeks commercial applicator certification in two categories. Under 171.103(a), what must the examinations and any alternate methods used to determine competency include?

    • A. The core standards applicable to all categories and the standards applicable to each category in which the applicator seeks certification
    • B. The standards for one of the two categories, chosen by the applicator
    • C. Only the core standards applicable to all categories
    • D. Only the standards for the two categories
    Show answer

    Answer: A. The core standards applicable to all categories and the standards applicable to each category in which the applicator seeks certification

    Examinations and any alternate methods "must include the core standards applicable to all categories (paragraph (c) of this section) and the standards applicable to each category in which an applicator seeks certification."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

Core standards for all commercial applicators

  1. 17. Under 171.103(c), which of the core areas of competency must the written examinations for all commercial applicators address?

    • A. Only the areas related to the categories the applicator seeks
    • B. Any areas the proctor selects at the examination session
    • C. Only the areas for which no category-specific standard exists
    • D. All of the areas of competency listed in 171.103(c)
    Show answer

    Answer: D. All of the areas of competency listed in 171.103(c)

    171.103(c) says "Written examinations for all commercial applicators must address all of the following areas of competency."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

Category-specific standards

  1. 18. Examinations for each 171.101 category must be based on the competency standards in 171.103(d)(1) through (15) and on what else?

    • A. The applicator's past pest control work history
    • B. The list of pesticides the applicator's employer uses
    • C. Examples of problems and situations appropriate to the particular category in which the applicator is seeking certification
    • D. Questions supplied by pesticide manufacturers
    Show answer

    Answer: C. Examples of problems and situations appropriate to the particular category in which the applicator is seeking certification

    Category examinations "must be based on the standards of competency specified in paragraphs (d)(1) through (15) of this section and examples of problems and situations appropriate to the particular category in which the applicator is seeking certification."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

  2. 19. In addition to the demonstration and research standards, what must applicators in that category demonstrate under 171.103(d)(10)?

    • A. A degree in a pest-related science
    • B. Competency in each pest control category applicable to their demonstrations
    • C. Five years of field research experience
    • D. Competency in every category listed in 171.101
    Show answer

    Answer: B. Competency in each pest control category applicable to their demonstrations

    171.103(d)(10) says "In addition, they must demonstrate competency in each pest control category applicable to their demonstrations."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)

Exceptions

  1. 20. A Doctor of Veterinary Medicine applies a restricted use pesticide to a patient during the course of the ordinary practice of veterinary medicine. What does 171.103(e) say about the requirements in 171.103(a)-(d) for this person?

    • A. They apply in full, as for any commercial applicator
    • B. Only the minimum age requirement applies
    • C. Only the core standards in 171.103(c) apply
    • D. They do not apply to this person
    Show answer

    Answer: D. They do not apply to this person

    "The requirements in § 171.103(a)-(d) of this part do not apply to the following persons," which include "Doctors of Medicine and Doctors of Veterinary Medicine applying restricted use pesticides to patients during the course of the ordinary practice of those professions."

    Source: eCFR: 40 CFR 171.103, Standards for certification of commercial applicators (as of Nov 4, 2026)