Ontario Pesticide Exterminator Exam – Printable Questions and Answers

50 Ontario pesticide exam practice questions on licensing, labels, safety, storage, spills and structural pests, with a separate answer key. Print or save as PDF. Free.

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The Ontario exterminator certification exam has a 50-question Core part, one hour and closed book, and a 50-question category module. This sheet gives you 50 original questions to practise on paper, the same length as the Core part, mixed across our eleven topics: licensing, pesticide classes, technicians and supervision, labels, safe use, storage and transport, containers and spills, structural rules, insect pests, rodents and business operation.

We do not copy the OPT&C manuals or exams. Every question is written from Ontario Regulation 63/09, the Pest Control Products Regulations, Health Canada guidance and the OPT&C information guide, and the answer key on the last pages explains each answer. Time yourself for 60 minutes to match the Core exam. Print the sheet, or choose Save as PDF to keep it on your phone.

Jump to the answer key

1.When may you mix two pesticides together in one tank?
1. Only when a label says they may be mixed
2. Whenever both products target the same pest
3. Whenever both are from the same class
4. Whenever the client requests it in writing
2.Which provincial ministry regulates the sale, storage, use, transport and disposal of pesticides in Ontario?
1. The Ministry of Agriculture, Food and Agribusiness
2. The Ministry of the Environment, Conservation and Parks
3. The Ministry of Labour, Immigration, Training and Skills
4. The Ministry of Health and its public health units
3.When does an operator licence expire?
1. On December 31 of the year it was issued
2. On March 31 of the following year
3. Five years after the date it was issued
4. When the operator's exterminator licence expires
4.For how many days back must a technician keep signed written instructions available at sites?
1. One year
2. 30 days
3. 90 days
4. 7 days
5.How should leftover concentrate never be disposed of?
1. Through a municipal hazardous waste program
2. According to the label disposal directions
3. Poured down a drain
4. By returning unopened product to the supplier
6.For an indoor fumigation with a Class B fumigant gas, when must written notice be delivered?
1. Within 7 days after the fumigation ends
2. At least 24 hours and no more than 7 days before
3. Only on the morning of the fumigation
4. At least 30 days before the fumigation, by registered mail
7.An operator stores Class C pesticides at its shop. What must it give the local fire department?
1. A monthly phone call
2. A spare key to the storage room
3. A copy of every sales receipt
4. A written notice every year
8.When are cockroaches most active?
1. At dawn only
2. In bright light
3. At night
4. At midday
9.What does the NOTICE TO USER on every label say?
1. The product is guaranteed to be harmless to pets
2. The product may be resold only by vendors
3. Using the product against the label is an offence
4. The maker is not responsible for any misuse
10.How should dry mouse droppings be cleaned up?
1. Vacuum them with a household vacuum and empty it outdoors
2. Sweep them up quickly with a dry broom
3. Blow them outside with a leaf blower
4. Wet them with bleach solution, then wipe them up
11.What is a Class E pesticide in Ontario?
1. Any pesticide imported into Ontario for personal use only
2. Corn or soybean seed treated with certain neonicotinoids
3. Any fumigant gas used in grain storage
4. Any product used to control aquatic weeds
12.What does an insect growth regulator such as methoprene do?
1. Repels insects from treated rooms for a full year
2. Kills adult insects on contact within seconds
3. Attracts insects into sticky traps on the floor
4. Stops immature insects from developing into adults
13.You fail the exam on your first try. What are the rewrite rules?
1. Unlimited tries over any period, as long as you pay a new fee each time
2. Two more tries within 12 months, no more than two per six months
3. One more try only, within 30 days of the first attempt
4. You must wait one full year before any second attempt
14.What minimum pollution liability coverage must a non-aerial operator carry?
1. $250,000 per occurrence
2. $5,000,000 per occurrence
3. $1,000,000 per occurrence
4. $150,000 per occurrence
15.What must a technician carry or have available at the site?
1. A letter of reference from the employer
2. A copy of the operator's insurance certificate
3. Proof of the safety course passed in the last 24 months
4. The original pesticide invoice from the product supplier
16.You fill a sprayer with water from a well. What must you do?
1. Fill it only with water heated above 40°C to dissolve the product
2. Take measures to prevent backflow into the well
3. Fill it only after the pesticide is added
4. Fill it only when the well pump is off
17.Which structural treatment can be done without an exterminator licence?
1. A Class D product with only diatomaceous earth
2. A Class B suspension in air in a warehouse
3. A Class C residual spray in a restaurant
4. A Class C rodenticide in a factory
18.What must a secondary container used by an exterminator be labelled with?
1. The exterminator's licence number only
2. Only the word POISON in large red letters on two sides
3. Name, ingredient concentrations and registration number
4. The client's name and the date of the job
19.What gives lasting control of carpenter ants?
1. Spraying the trail of foraging ants on the kitchen counter
2. Vacuuming up every ant seen on the floors each evening
3. Finding and treating the nest, including the parent colony
4. Placing sticky traps under the sink for several weeks
20.What does the guarantee statement on a label tell you?
1. The refund policy if the product fails
2. How long the product is guaranteed to work
3. The minimum number of pests it will kill
4. The percentage of each active ingredient
21.About how small a gap can a mouse squeeze through?
1. About the size of a dinner plate
2. About the size of a dime
3. About the size of a toonie stack
4. About the size of a fist
22.When may an unlisted pesticide be used on land around a house to control carpenter ants?
1. Only in spring before ants become active
2. Whenever the homeowner sees ants on the patio
3. Only if the product is a Domestic-class spray from a store
4. Only to prevent structural damage that risks safety
23.What does 'adequate protective clothing' include under O. Reg. 63/09?
1. Cotton gloves, canvas sneakers and a light cap
2. A short-sleeved shirt and a dust mask
3. Leather gloves and a wool sweater
4. Rubber or neoprene boots and gloves, hat and coat
24.How is the exterminator certification exam structured?
1. One 100-question exam covering all licence types
2. A practical spraying test followed by a short oral exam
3. Two 50-question parts: the Core and a category module
4. Three 30-question parts taken on separate days
25.Which records must be kept for at least two years?
1. Client phone numbers and marketing lists only
2. Supervisee training records and acute bait placement records
3. Daily fuel receipts and the full vehicle maintenance log only
4. Weather reports for each outdoor job only
26.Which of these may a technician NOT do?
1. Carry the signed written instructions for the job
2. Apply a Class C insecticide under supervision
3. Follow the label directions for the product
4. Choose which pesticide to use on a job
27.What is the Spills Action Centre's toll-free number?
1. 1-800-461-6290
2. 1-800-731-4000
3. 1-800-268-6060
4. 1-888-620-9999
28.During a strychnine baiting job, how often must dead animals be removed?
1. Daily
2. Only if they smell
3. At the end of the job
4. Weekly
29.When may Class C pesticides be left unsupervised in a work vehicle?
1. Whenever the windows are closed and the engine is off
2. When locked in a compartment or the van is not public
3. Whenever the products are still in their original boxes
4. Whenever the vehicle is parked for less than one hour
30.How can you recognize a German cockroach?
1. Shiny black, about 5 cm long, with no wings at all
2. Reddish with a white band across the middle of the back
3. Grey with yellow spots and long hind legs for jumping
4. Tan to light brown with two dark stripes behind the head
31.Which information is required on the principal display panel?
1. The detailed directions for use
2. The full first aid instructions
3. The toxicological information for doctors
4. Signal words and precautionary symbols
32.What does Health Canada say about relying only on rodenticides?
1. Rodent-proofing and sanitation are also needed
2. Rodenticides alone give permanent control
3. Rodenticides should be used before inspecting
4. Traps should never be used with baits
33.A customer finds an old can of chlordane in a garage. What does the regulation allow?
1. Only managing it as hazardous waste
2. Selling it back to a licensed vendor
3. Using it once, then rinsing the container
4. Using it up indoors where it is safe
34.Before treating a kitchen for cockroaches, what should be done with dishes and utensils?
1. Leave them where they are
2. Spray them so they stay protected
3. Remove or cover them
4. Rinse them before treating
35.How long is an Ontario exterminator licence valid?
1. One year, to December 31
2. For life, once issued
3. Five years
4. Three years
36.Who needs a pesticide operator licence?
1. Anyone who buys more than 10 litres of pesticide a year
2. Anyone who sells pesticides in a retail store
3. Anyone who runs a business employing people to apply pesticides
4. Every licensed exterminator who works for an employer in Ontario
37.When may a trainee apply a Class C pesticide?
1. Only with a licensed exterminator present
2. When a technician is supervising
3. When the job sheet names the product
4. After one month of employment
38.An empty plastic jug held a Class C insecticide. What must happen to it first?
1. Throw it straight into the household garbage bin
2. Refill it with another product the same day
3. Burn it in a barrel behind the shop at night
4. Triple-rinse or jet-rinse it promptly
39.Which pests does the Structural class NOT cover?
1. Pests of plants
2. Bed bugs in an apartment
3. Cockroaches in a restaurant
4. Rodents in a warehouse
40.What does Health Canada advise about empty pesticide containers?
1. Reuse them for fuel
2. Reuse them for feed
3. Reuse them for water
4. Never reuse them
41.Why should dead ants be left in place after a carpenter ant treatment?
1. They show the client the treatment worked
2. They act as bait for spiders and centipedes
3. Other ants may carry the pesticide back to the nest
4. They warn other ants that they should leave the building
42.A pesticide label is divided into which two parts?
1. A product panel and a separate SDS booklet
2. An English panel and a French panel only
3. A front safety sheet and a back price sheet
4. A principal and a secondary display panel
43.Why bait traps for a few days without setting them?
1. So the bait loses its strong smell
2. So rodents get used to taking the bait
3. So the trap spring can loosen and settle
4. So pets learn to avoid the trap area
44.According to O. Reg. 63/09, how must every pesticide be used?
1. However the supervising technician recommends
2. At double the label rate for heavy infestations
3. As the client asks, if the client signs a waiver
4. In accordance with its label and the regulation
45.Which activity is unsafe while applying a pesticide?
1. Keeping children out of the treated area
2. Wearing the gloves listed on the label
3. Reading the label before mixing the product
4. Smoking a cigarette on a short break
46.What is the minimum age to hold an Ontario exterminator licence?
1. 16
2. 18
3. 21
4. 19
47.Right after an operator licence is issued, for how long may a temporary marker be displayed inside the vehicle?
1. 7 days
2. One year
3. 21 days
4. 60 days
48.What makes a worker a technician?
1. Holding an operator licence for one full year
2. A safety course in the last 24 months plus practical training
3. Passing the Core exam but not the category module
4. Two years of work experience with any licensed pest company
49.The original container of a Class C product cracks in your van. What is required?
1. Pour the product into a drink bottle until the job
2. Clean up and move the product to an equivalent labelled container
3. Tape the crack firmly and keep using the original container as before
4. Leave it in the van until the next ministry inspection
50.Which licence class is needed to apply termiticides to prevent or control termites?
1. Landscape class
2. Structural class
3. Fumigation Soil class
4. Termite class

Answer key with explanations

1. A — Only when a label says they may be mixed
Never mix pesticides unless the label tells you to. Mixing can change toxicity and effectiveness.
Safe use, protective equipment and first aid · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 5 Safe use, protective equipment and first aid, Health Canada — Use pesticides safely
2. B — The Ministry of the Environment, Conservation and Parks
MECP regulates pesticides in Ontario under the Pesticides Act and O. Reg. 63/09. Health Canada registers products federally.
Licences, certification and the exam · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 1 Licences, certification and the exam, OPT&C Information Guide — How are pesticides regulated
3. A — On December 31 of the year it was issued
Operator licences expire on December 31 of the year issued and must be renewed each year. Exterminator licences last five years.
Operating an extermination business · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 11 Operating an extermination business, ontario.ca — Pesticide licences and permits
4. B — 30 days
Technicians must carry or have readily available all written instructions signed by a supervising exterminator over the last 30 days.
Technicians, trainees and supervision · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 3 Technicians, trainees and supervision, O. Reg. 63/09 s. 46 Table
5. C — Poured down a drain
Never burn pesticides or pour them down a drain. Follow label disposal directions and use municipal hazardous waste programs.
Containers, spills and disposal · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 7 Containers, spills and disposal, Health Canada — Use pesticides safely
6. B — At least 24 hours and no more than 7 days before
Notice goes to the owner, adult occupants, nearby buildings, the medical officer of health, police and fire department at least 24 hours but not more than seven days before the fumigation.
Structural extermination rules · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 8 Structural extermination rules, O. Reg. 63/09 s. 60 (2)
7. D — A written notice every year
Operators (and vendors and manufacturers) who store Class B, C or D pesticides must give the fire department a written notice each year identifying the pesticide, its location, storage conditions and the person responsible.
Storage, vehicles and transport · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 6 Storage, vehicles and transport, O. Reg. 63/09 s. 112
8. C — At night
Cockroaches are most active at night, so an infestation can go unnoticed for some time. Sticky traps help show where they are.
Insect pests and integrated pest management · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 9 Insect pests and integrated pest management, Health Canada — Cockroaches
9. C — Using the product against the label is an offence
The notice states the product must be used only as the label directs and that using it inconsistently with the label is an offence under the Pest Control Products Act.
Reading the pesticide label · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 4 Reading the pesticide label, Pest Control Products Regulations s. 26 (2)(g)
10. D — Wet them with bleach solution, then wipe them up
Wear rubber gloves and a dust mask, dampen droppings with bleach and water before wiping, and never sweep or vacuum dry droppings because the dust can cause illness.
Rats and mice · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 10 Rats and mice, Health Canada — Rats and mice
11. B — Corn or soybean seed treated with certain neonicotinoids
Class E covers corn or soybean seed treated with a pesticide containing imidacloprid, clothianidin or thiamethoxam.
Pesticide classes and the law · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 2 Pesticide classes and the law, O. Reg. 63/09 s. 2
12. D — Stops immature insects from developing into adults
Insect growth regulators such as methoprene and pyriproxyfen stop larvae from maturing, breaking the breeding cycle. They do not kill adults already present.
Safe use, protective equipment and first aid · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 5 Safe use, protective equipment and first aid, Health Canada — Fleas
13. B — Two more tries within 12 months, no more than two per six months
After a failure you have 12 months to rewrite, with a maximum of two more attempts and no more than two attempts in any six-month period. The rewrite fee is $82.
Licences, certification and the exam · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 1 Licences, certification and the exam, OPT&C — Fees and rewrites
14. C — $1,000,000 per occurrence
Pollution liability coverage of at least $1,000,000 per occurrence is required; the lower $150,000 minimum applies only to businesses doing aerial applications only.
Operating an extermination business · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 11 Operating an extermination business, O. Reg. 63/09 s. 93 (2)
15. C — Proof of the safety course passed in the last 24 months
A technician must carry or have readily available proof of completing an approved pesticide safety course within the previous 24 months. Trainees carry the employer's trainee ID.
Technicians, trainees and supervision · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 3 Technicians, trainees and supervision, O. Reg. 63/09 s. 46 (3)
16. B — Take measures to prevent backflow into the well
No person may use water from a well, lake or river in an extermination unless they take measures to prevent backflow of pesticide into the water source, such as an air gap or anti-backflow device.
Containers, spills and disposal · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 7 Containers, spills and disposal, O. Reg. 63/09 s. 12 (1)
17. A — A Class D product with only diatomaceous earth
No licence is needed for a structural extermination with a Class D product whose only active ingredient is soap, mineral oil or diatomaceous earth, among a few other Class D exemptions.
Structural extermination rules · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 8 Structural extermination rules, O. Reg. 63/09 s. 51
18. C — Name, ingredient concentrations and registration number
A secondary container must be customarily used or approved by the manufacturer and labelled with the pesticide name, the concentration of each ingredient and its registration number.
Storage, vehicles and transport · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 6 Storage, vehicles and transport, O. Reg. 63/09 s. 104 (2)
19. C — Finding and treating the nest, including the parent colony
For lasting control, locate and treat the nest. With satellite colonies, the parent colony must also be found and destroyed, together with moisture and wood repairs.
Insect pests and integrated pest management · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 9 Insect pests and integrated pest management, Health Canada — Carpenter ants
20. D — The percentage of each active ingredient
The guarantee lists the concentration of each active ingredient, the chemical that controls the pest. The same active ingredient may be sold under several product names.
Reading the pesticide label · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 4 Reading the pesticide label, Nova Scotia — Understanding the Pesticide Label
21. B — About the size of a dime
Mice can enter through cracks as small as a dime; rats through a hole about the size of a quarter.
Rats and mice · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 10 Rats and mice, Health Canada — Rats and mice
22. D — Only to prevent structural damage that risks safety
Unlisted pesticides may be used on land around a building to control pests such as carpenter ants or termites only to prevent structural damage that would put a person's health or safety at risk.
Pesticide classes and the law · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 2 Pesticide classes and the law, O. Reg. 63/09 s. 22
23. D — Rubber or neoprene boots and gloves, hat and coat
Adequate protective clothing includes rubber or neoprene boots and gloves, hats, coats and other garments that protect the skin from pesticide contact.
Safe use, protective equipment and first aid · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 5 Safe use, protective equipment and first aid, O. Reg. 63/09 s. 110 (2)
24. C — Two 50-question parts: the Core and a category module
The exam has two multiple-choice parts of 50 questions each: the Core Manual exam and the Licence Category Specific Module exam.
Licences, certification and the exam · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 1 Licences, certification and the exam, OPT&C — Become an Exterminator
25. B — Supervisee training records and acute bait placement records
Training records are kept at least two years after a supervisee leaves, and placement records for strychnine, zinc phosphide or 4-aminopyridine baits are kept at least two years.
Operating an extermination business · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 11 Operating an extermination business, O. Reg. 63/09 ss. 48, 66
26. D — Choose which pesticide to use on a job
Technicians and trainees may not select or recommend a pesticide, or choose the method or rate of application. Those decisions belong to the licensed exterminator.
Technicians, trainees and supervision · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 3 Technicians, trainees and supervision, O. Reg. 63/09 s. 46 Table
27. C — 1-800-268-6060
Spills must be reported by phone to the Spills Action Centre at 1-800-268-6060, staffed 24 hours a day, 7 days a week.
Containers, spills and disposal · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 7 Containers, spills and disposal, ontario.ca — Report pollution and spills
28. A — Daily
Exterminated animals must be disposed of on a daily basis in a manner that prevents contact with humans or other animals.
Structural extermination rules · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 8 Structural extermination rules, O. Reg. 63/09 s. 66 (1)(d)
29. B — When locked in a compartment or the van is not public
Class A, B, C or D pesticides may not be left unsupervised in a vehicle unless the vehicle is in a place inaccessible to the public or the pesticide is locked in an enclosed part of the vehicle.
Storage, vehicles and transport · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 6 Storage, vehicles and transport, O. Reg. 63/09 s. 108 (1)
30. D — Tan to light brown with two dark stripes behind the head
The German cockroach is about 1.3–1.6 cm long, tan to light brown, with two dark parallel streaks from the head to the wings. It has wings but cannot fly.
Insect pests and integrated pest management · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 9 Insect pests and integrated pest management, Health Canada — Cockroaches
31. D — Signal words and precautionary symbols
The principal display panel shows the product name, class, hazard symbols and signal words, active ingredients, registration number and more. Directions, first aid and toxicology go on the secondary panel.
Reading the pesticide label · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 4 Reading the pesticide label, Pest Control Products Regulations s. 26 (1)
32. A — Rodent-proofing and sanitation are also needed
Baits or poisons should not be the only control method; rodent-proofing and good sanitation are also required.
Rats and mice · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 10 Rats and mice, Health Canada — Rats and mice
33. A — Only managing it as hazardous waste
Aldrin, chlordane, chlordecone, DDT, dieldrin and endrin may not be used, stored, sold or transported, except to be managed and disposed of as hazardous waste.
Pesticide classes and the law · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 2 Pesticide classes and the law, O. Reg. 63/09 s. 11
34. C — Remove or cover them
Indoors, remove or cover food, dishes, utensils, aquariums and pet dishes before applying, ventilate afterward and wash food-contact surfaces once dry.
Safe use, protective equipment and first aid · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 5 Safe use, protective equipment and first aid, Health Canada — Use pesticides safely
35. C — Five years
Exterminator licences are valid for five years from the date of issue; the licence fee is $90. Operator licences, by contrast, expire every December 31.
Licences, certification and the exam · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 1 Licences, certification and the exam, OPT&C Information Guide; ontario.ca licences page
36. C — Anyone who runs a business employing people to apply pesticides
An operator licence is needed to operate a pesticide extermination business or employ people who apply pesticides commercially. Selling pesticides needs a vendor licence.
Operating an extermination business · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 11 Operating an extermination business, OPT&C Information Guide; ontario.ca
37. A — Only with a licensed exterminator present
Trainees may use Class C or D pesticides only in the presence of a licensed exterminator authorized to use the pesticide.
Technicians, trainees and supervision · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 3 Technicians, trainees and supervision, O. Reg. 63/09 s. 46 Table
38. D — Triple-rinse or jet-rinse it promptly
Empty plastic, glass or metal containers that held Class A, B or C pesticides must be promptly triple-rinsed or jet-rinsed with clean water or another suitable solvent.
Containers, spills and disposal · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 7 Containers, spills and disposal, O. Reg. 63/09 s. 105 (1)
39. A — Pests of plants
The Structural class covers any structural extermination except one to control pests of plants; indoor plant pests fall under the Greenhouse/Interior Plant class.
Structural extermination rules · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 8 Structural extermination rules, O. Reg. 63/09 s. 53 Table
40. D — Never reuse them
Never reuse empty pesticide containers. Store products in their original containers, away from food and out of reach of children and pets.
Storage, vehicles and transport · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 6 Storage, vehicles and transport, Health Canada — Use pesticides safely
41. C — Other ants may carry the pesticide back to the nest
Health Canada advises leaving dead ants, since scavenging ants may carry them back to the nest and spread the pesticide through the colony.
Insect pests and integrated pest management · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 9 Insect pests and integrated pest management, Health Canada — Carpenter ants
42. D — A principal and a secondary display panel
Every registered pest control product must have a display panel made up of a principal display panel and a secondary display panel.
Reading the pesticide label · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 4 Reading the pesticide label, Pest Control Products Regulations s. 25
43. B — So rodents get used to taking the bait
Baiting traps for 3–4 days without setting them makes rodents comfortable with the bait, so more are caught once the traps are set. Check set traps daily.
Rats and mice · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 10 Rats and mice, Health Canada — Rats and mice
44. D — In accordance with its label and the regulation
No person may use a pesticide except in accordance with its label and O. Reg. 63/09. The label is a legal document.
Pesticide classes and the law · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 2 Pesticide classes and the law, O. Reg. 63/09 s. 9 (3)
45. D — Smoking a cigarette on a short break
Do not eat, drink or smoke while applying pesticides, and avoid touching your eyes or mouth; residues on your hands can be swallowed or ignite.
Safe use, protective equipment and first aid · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 5 Safe use, protective equipment and first aid, Health Canada — Use pesticides safely
46. A — 16
An exterminator licence applicant must be at least 16, with Grade 10 standing or equivalent, and must have passed an approved course within the previous 12 months. Operators must be 18.
Licences, certification and the exam · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 1 Licences, certification and the exam, OPT&C Information Guide — Qualifications; O. Reg. 63/09 s. 36
47. C — 21 days
For the first 21 days after issue or renewal, a temporary marker from the ministry's website displayed inside the vehicle may be used.
Operating an extermination business · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 11 Operating an extermination business, O. Reg. 63/09 s. 89 (2)
48. B — A safety course in the last 24 months plus practical training
A technician is a trainee who has completed an MECP-approved pesticide safety course within the previous 24 months and received practical training from a licensed exterminator.
Technicians, trainees and supervision · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 3 Technicians, trainees and supervision, OPT&C Information Guide — Technician
49. B — Clean up and move the product to an equivalent labelled container
Clean up spillage and decontaminate under the registrant's direction, put any product kept into an equivalent container with the name, concentrations and registration number, and treat the broken container as empty.
Containers, spills and disposal · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 7 Containers, spills and disposal, O. Reg. 63/09 s. 106
50. D — Termite class
Termiticides are excluded from the Structural class. The Termite class authorizes termiticides (other than fumigant gases and chloropicrin) to prevent or control termites.
Structural extermination rules · Based on: Ontario Pesticides Act, O. Reg. 63/09, OPT&C and Health Canada (Oct 2026), Ch. 8 Structural extermination rules, O. Reg. 63/09 s. 53 Table

Original practice questions by Canada Exam Prep, written from the official handbook. Not official test questions. Free to print for personal study.

FAQ

Ontario pesticide exam questions (printable PDF): common questions

Is there an official Ontario pesticide exam PDF?

No. OPT&C does not publish its exams; candidates study from the Core Manual and category module. This sheet is original practice written from the regulation and government guidance.

What score on this sheet means I am ready?

The real pass mark is 75%, which is 38 out of 50. Aim for 42 or more under a 60-minute limit before your exam.

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Press the print button and choose Save as PDF as the printer. Menus and ads are left out, and the answer key starts on its own page.

Ontario Pesticide Exterminator Exam – Printable Questions and Answers