Page 1 of 55
OKLAHOMA COMMERCIAL PESTICIDE APPLICATOR
CERTIFICATION — CATEGORY 5 AQUATIC PEST CONTROL
EXAMINATION 2026/2027 COMPLETE (150) CURRENT
TESTING QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES.
PESTICIDE
Prepare effectively for the Oklahoma Commercial Pesticide Applicator Certification
Category 5 Aquatic Pest Control Examination with this focused study resource. It
supports review of aquatic pest management, pesticide safety, application
techniques, pest identification, environmental protection, equipment handling, and
regulatory requirements. Use the material to reinforce your knowledge, review key
topics, and identify areas that may require additional study. This resource is suited for
commercial pesticide applicators, aquatic pest management professionals, and
candidates preparing for the Oklahoma Category 5 certification examination.
MULTIPLE CHOICE.
SECTION 1: REGULATORY FRAMEWORK & LICENSING REQUIREMENTS
(Questions 1–25)
Question 1:
Which law establishes pesticide registration and use in Oklahoma?
A) Clean Water Act
B) Oklahoma Combined Pesticide Law
C) FIFRA
D) EPA Pesticide Act
Answer: B
Rationale: The Oklahoma Combined Pesticide Law (Title 2 O.S. § 3-81 et seq.)
governs pesticide registration and enforcement at the state level. FIFRA is the
federal law that establishes the national framework, but Oklahoma's state law
provides the specific regulatory authority for licensing and enforcement within
the state.
, Page 2 of 55
Question 2:
According to Oklahoma regulations, how long must pesticide application
records be retained?
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Answer: C
Rationale: Oklahoma law requires commercial applicators to retain pesticide
application records for a minimum of three years. This applies to all pesticide
applications, including aquatic treatments.
Question 3:
Which pesticide category requires a written permit before aquatic
application?
A) General Use
B) Restricted Use
C) Over-the-counter
D) Biopesticide
Answer: B
Rationale: Restricted-use pesticides (RUPs) require a state-issued permit
before aquatic application. These products can only be applied by or under
the direct supervision of a certified applicator.
Question 4:
Which data point is NOT mandatory on an aquatic pesticide application log in
Oklahoma?
A) Date of application
B) Weather conditions
, Page 3 of 55
C) Chemical rate used
D) Operator phone number
Answer: D
Rationale: Operator phone numbers are not required by law on pesticide
application records. Required elements include date, location, product used,
application rate, weather conditions, and applicator's name.
Question 5:
A private applicator in Oklahoma must recertify every how many years?
A) 2 years
B) 3 years
C) 5 years
D) 7 years
Answer: C
Rationale: The certification cycle for private applicators in Oklahoma is five
years.
Question 6:
Which federal act requires that all pesticide labels be approved by the EPA
before the product can be sold in the United States?
A) Clean Water Act
B) Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)
C) Occupational Safety and Health Act (OSHA)
D) Toxic Substances Control Act (TSCA)
Answer: B
Rationale: FIFRA governs the registration, labeling, distribution, and use of
pesticides and requires EPA approval of all pesticide labels.
, Page 4 of 55
Question 7:
In Oklahoma, which agency is primarily responsible for issuing commercial
pesticide applicator licenses?
A) Oklahoma Department of Environmental Quality
B) Oklahoma Department of Agriculture, Food, and Forestry (ODAFF)
C) Oklahoma State Department of Health
D) Oklahoma Department of Labor
Answer: B
Rationale: ODAFF administers the state's pesticide licensing program,
including exams, renewals, and enforcement.
Question 8:
What does Category 5 – Aquatic Pest Control include?
A) Mosquito control in residential areas
B) Application of pesticides to standing or running water in manmade or
natural impoundments, streams, etc.
C) Application of pesticides in agricultural crop production
D) Application of pesticides in water in totally closed systems
Answer: B
Rationale: Category 5 includes the application of pesticides to standing or
running water in manmade or natural impoundments, streams, etc. It
excludes public health activities (e.g., mosquito control) and water in totally
closed systems.
Question 9:
Which of the following is EXCLUDED from the Category 5 scope?
A) Lakes
B) Ponds
C) Mosquito control in public health programs
D) Reservoirs
OKLAHOMA COMMERCIAL PESTICIDE APPLICATOR
CERTIFICATION — CATEGORY 5 AQUATIC PEST CONTROL
EXAMINATION 2026/2027 COMPLETE (150) CURRENT
TESTING QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES.
PESTICIDE
Prepare effectively for the Oklahoma Commercial Pesticide Applicator Certification
Category 5 Aquatic Pest Control Examination with this focused study resource. It
supports review of aquatic pest management, pesticide safety, application
techniques, pest identification, environmental protection, equipment handling, and
regulatory requirements. Use the material to reinforce your knowledge, review key
topics, and identify areas that may require additional study. This resource is suited for
commercial pesticide applicators, aquatic pest management professionals, and
candidates preparing for the Oklahoma Category 5 certification examination.
MULTIPLE CHOICE.
SECTION 1: REGULATORY FRAMEWORK & LICENSING REQUIREMENTS
(Questions 1–25)
Question 1:
Which law establishes pesticide registration and use in Oklahoma?
A) Clean Water Act
B) Oklahoma Combined Pesticide Law
C) FIFRA
D) EPA Pesticide Act
Answer: B
Rationale: The Oklahoma Combined Pesticide Law (Title 2 O.S. § 3-81 et seq.)
governs pesticide registration and enforcement at the state level. FIFRA is the
federal law that establishes the national framework, but Oklahoma's state law
provides the specific regulatory authority for licensing and enforcement within
the state.
, Page 2 of 55
Question 2:
According to Oklahoma regulations, how long must pesticide application
records be retained?
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Answer: C
Rationale: Oklahoma law requires commercial applicators to retain pesticide
application records for a minimum of three years. This applies to all pesticide
applications, including aquatic treatments.
Question 3:
Which pesticide category requires a written permit before aquatic
application?
A) General Use
B) Restricted Use
C) Over-the-counter
D) Biopesticide
Answer: B
Rationale: Restricted-use pesticides (RUPs) require a state-issued permit
before aquatic application. These products can only be applied by or under
the direct supervision of a certified applicator.
Question 4:
Which data point is NOT mandatory on an aquatic pesticide application log in
Oklahoma?
A) Date of application
B) Weather conditions
, Page 3 of 55
C) Chemical rate used
D) Operator phone number
Answer: D
Rationale: Operator phone numbers are not required by law on pesticide
application records. Required elements include date, location, product used,
application rate, weather conditions, and applicator's name.
Question 5:
A private applicator in Oklahoma must recertify every how many years?
A) 2 years
B) 3 years
C) 5 years
D) 7 years
Answer: C
Rationale: The certification cycle for private applicators in Oklahoma is five
years.
Question 6:
Which federal act requires that all pesticide labels be approved by the EPA
before the product can be sold in the United States?
A) Clean Water Act
B) Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)
C) Occupational Safety and Health Act (OSHA)
D) Toxic Substances Control Act (TSCA)
Answer: B
Rationale: FIFRA governs the registration, labeling, distribution, and use of
pesticides and requires EPA approval of all pesticide labels.
, Page 4 of 55
Question 7:
In Oklahoma, which agency is primarily responsible for issuing commercial
pesticide applicator licenses?
A) Oklahoma Department of Environmental Quality
B) Oklahoma Department of Agriculture, Food, and Forestry (ODAFF)
C) Oklahoma State Department of Health
D) Oklahoma Department of Labor
Answer: B
Rationale: ODAFF administers the state's pesticide licensing program,
including exams, renewals, and enforcement.
Question 8:
What does Category 5 – Aquatic Pest Control include?
A) Mosquito control in residential areas
B) Application of pesticides to standing or running water in manmade or
natural impoundments, streams, etc.
C) Application of pesticides in agricultural crop production
D) Application of pesticides in water in totally closed systems
Answer: B
Rationale: Category 5 includes the application of pesticides to standing or
running water in manmade or natural impoundments, streams, etc. It
excludes public health activities (e.g., mosquito control) and water in totally
closed systems.
Question 9:
Which of the following is EXCLUDED from the Category 5 scope?
A) Lakes
B) Ponds
C) Mosquito control in public health programs
D) Reservoirs
