Ohio 10A General Pest Control Practice Test

Free sample questions written from OSU e841-10A (2025), with chapter and page references. You also need to pass Commercial Core; check OSU corrections to your copy of the manual.

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Q01Pest Management in Specialized Facilities

A product label states: "Residents and pets may return to treated rooms only after every sprayed surface has dried." The carpet is dry, but sprayed trim remains wet. What should the technician conclude?

Residents may return because the largest surface is dry.The stated return condition has not been met.Pets may return first because the restriction applies only to residents.The wet trim is irrelevant if no spray odor remains.

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B. The stated return condition has not been met.

The condition applies to every sprayed surface, including trim. Partial drying, lack of odor, or a distinction between people and pets does not satisfy the excerpt.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 5 Pest Management in Specialized Facilities · p. 44

Q02Cockroaches

A residual spray is proposed directly over fresh cockroach bait placements. What is the main concern?

The combination converts the bait into an insect growth regulator.The spray automatically makes every bait more attractive.The spray may contaminate bait or discourage feeding.Contact with spray is required before any bait can be eaten.

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C. The spray may contaminate bait or discourage feeding.

Bait depends on feeding acceptance. Contamination or repellency can undermine that process, so compatible placement and label directions are essential.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 7 Cockroaches · p. 64

Q03Pest Management Concepts and Approaches

A food storeroom monitor catches German cockroach adults together with nymphs on repeated visits. What does this pattern suggest beyond a single accidental introduction?

Only a single imported egg case is possible.An established reproducing infestation needs investigation.The monitors show only adult immigration.The catches can be dismissed as nonbreeding visitors.

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B. An established reproducing infestation needs investigation.

Several life stages repeatedly found together support local reproduction. That calls for finding harborages and contributing conditions rather than assuming each catch is an isolated hitchhiker.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 2 Pest Management Concepts and Approaches · p. 16

Q04Silverfish, Firebrats, and Book Lice

Stored books have grazed surfaces, irregular paper damage, and nearby silverfish. Which resource may support the insects?

Only live mold on food, because silverfish cannot use starch-containing products.Only the mineral coating of the paper, with adhesives playing no role.Starch-containing adhesives and related stored materials.The shelf's paint film, because book materials cannot support silverfish feeding.

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C. Starch-containing adhesives and related stored materials.

Silverfish can consume starch-containing adhesives and other materials around stored paper. They are not limited to mold, mineral coatings, or shelf paint, so the books and bindings deserve inspection.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 10 Silverfish, Firebrats, and Book Lice · p. 94

Q05Detecting, Identifying, and Monitoring Pests

Tiny mites remain indistinguishable with a hand lens. Which tool is the logical next step for examining diagnostic details?

A larger sticky board without magnification.A coarse-mesh strainer for sorting the sample.A dissecting microscope with suitable magnification.A brighter room lamp viewed from farther away.

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C. A dissecting microscope with suitable magnification.

Small diagnostic structures may require greater magnification. Improved capture or lighting alone cannot replace resolution of those structures.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 3 Detecting, Identifying, and Monitoring Pests · p. 19

Q06Parasites: Bed Bugs, Lice, Fleas, and Ticks

Bed bugs are confirmed in a well-kept hotel room. What should staff understand about the finding?

Confirmation proves housekeeping never cleans the room.Clean rooms cannot contain reproducing bed bugs.Only rooms with exposed food can support them.Hitchhiking can introduce them into clean rooms.

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D. Hitchhiking can introduce them into clean rooms.

Bed bugs travel with belongings and use blood rather than food debris. Cleanliness alone does not prevent introduction, although reducing clutter assists control.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 11 Parasites: Bed Bugs, Lice, Fleas, and Ticks · p. 98

Q07Spiders

A widow spider is found in an undisturbed tangle web within stacked firewood. Which inspection precaution addresses the likely encounter route?

Handle hidden web contents without looking first.Avoid pinning a concealed spider.Test aggression by pressing the spider against bare skin.Assume a sheltered web cannot contain a widow.

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B. Avoid pinning a concealed spider.

Bites can occur when a concealed spider is compressed during handling. Inspection should account for sheltered webs rather than provoke direct contact.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 14 Spiders · p. 147

Q08Application Equipment: Types, Use, and Maintenance

A crew needs four batches, each containing 2 gallons of finished spray at 0.4 fl oz of product per gallon. What is the total product requirement?

0.8 fl oz.6.4 fl oz.1.6 fl oz.3.2 fl oz.

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D. 3.2 fl oz.

Total finished spray = 4 × 2 = 8 gal; product = 8 × 0.4 = 3.2 fl oz. Count all batches.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 4 Application Equipment: Types, Use, and Maintenance · p. 34

Q09Pest Management Concepts and Approaches

A client and technician disagree about whether occasional ants warrant intervention. What should they establish for future decisions?

A guarantee that any insect requires full-room spraying.A rule that complaints alone replace pest identification.An agreed activity level and response appropriate to the site.A single tolerance level for every pest and building.

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C. An agreed activity level and response appropriate to the site.

A threshold connects acceptable activity and risk to an agreed response. Different pests and sites can justify different tolerances and actions.

Q10Stored-Product and Fabric Pests

Why can intact-looking cereal grains conceal a granary weevil infestation?

All larvae remain visible outside the grain.Only the adults can occupy stored grain.The kernels must be completely hollow before eggs are laid.Immatures can develop within individual kernels.

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D. Immatures can develop within individual kernels.

Granary weevil development can occur inside grain. Surface inspection alone can therefore miss immature stages until adults emerge.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 9 Stored-Product and Fabric Pests · p. 83

Q11Ants

Pharaoh ants appear in a previously uninfested room after stored supplies arrive from an infested building. Which route is most plausible?

A small colony traveled with the moved objects.The room's warm plumbing attracted an annual migration of outdoor reproductive males.Winged queens from a nearby lawn nest entered through open windows.Foragers crossed the neighborhood from a single permanent outdoor mound.

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A. A small colony traveled with the moved objects.

Pharaoh ant colonies can be transferred in infested objects. Their spread is associated with colony movement rather than a typical outdoor swarming route.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 8 Ants · p. 75

Q12Application Equipment: Types, Use, and Maintenance

A water test covers a 1.5-foot-wide strip at 12 feet per minute. How much area is covered in 3 minutes?

72 sq ft.36 sq ft.24 sq ft.54 sq ft.

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D. 54 sq ft.

Length = 12 × 3 = 36 ft; area = 36 × 1.5 = 54 sq ft. Both strip width and travel time affect coverage.

Q13Pest Management in Specialized Facilities

A grocery store has both moist produce displays and dry cereal storage. Which inspection plan best reflects these different pest resources?

Use only one dry-food inspection route for both areas.Check moisture-associated pests near produce and stored-food pests near cereals.Assume cooled produce cannot support moisture-associated pests.Ignore cereal storage while checking all produce displays.

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B. Check moisture-associated pests near produce and stored-food pests near cereals.

Food type and available moisture affect which pests can develop. The inspection should follow those resources rather than apply one habitat assumption to the entire store.

Q14Silverfish, Firebrats, and Book Lice

A wingless household pest has a flattened body, long antennae, and three tail filaments. Which group should be considered?

Cockroach nymphs.Book lice.Earwig nymphs.Silverfish or firebrats.

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D. Silverfish or firebrats.

Three long terminal filaments and the flattened body favor bristletails. The other groups have different body forms and do not share those tails.

Q15Laws and Regulations for Commercial Applicators

A product label states: "The emptied package must not be reused for any other purpose." A worker proposes using it to carry drinking water. What follows?

It is allowed if the water is intended only for adults.It is allowed after removing the original label.That reuse is prohibited even after the package looks clean.It is allowed whenever no odor can be detected inside.

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C. That reuse is prohibited even after the package looks clean.

The no-reuse instruction is categorical for this package. Appearance, label removal, and odor do not authorize food or drinking-water reuse.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 1 Laws and Regulations for Commercial Applicators · p. 11

Q16Flies, Gnats, and Midges

Residents request removal of every black fly by treating only their dry lawn. What source issue should be explained?

Removing lawn clippings can be expected to eliminate the stream-associated larvae.The immature stages develop in flowing water rather than lawn soil.Indoor refuse is the primary source whenever adult black flies approach people.The larvae usually develop in the same dry grass where adults are biting.

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B. The immature stages develop in flowing water rather than lawn soil.

Black fly development is tied to flowing-water habitat. A dry-lawn treatment cannot be assumed to control the developmental source.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 12 Flies, Gnats, and Midges · p. 129

Q17Pest Management in Specialized Facilities

Flies and beetles appear near a food plant's receiving area after deliveries. Which inspection target is especially relevant?

The paint color of interior doors.Only clean cafeteria dishes stored indoors.Only sealed offices on an upper floor.Spilled goods and entry conditions around the dock.

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D. Spilled goods and entry conditions around the dock.

Receiving areas combine possible entry routes with food spills. Following that combination is more informative than inspecting unrelated clean areas first.

Q18Cockroaches

Large reddish-brown cockroaches repeatedly appear around warm steam tunnels and boiler-room drains. Which species is especially associated with that setting?

Brownbanded cockroach.German cockroach.American cockroach.Pennsylvania wood cockroach.

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C. American cockroach.

American cockroaches favor warm, humid utility and sewer environments. The setting differs from dry elevated brownbanded harborages and outdoor wood-roach breeding sites.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 7 Cockroaches · p. 60

Q19Application Equipment: Types, Use, and Maintenance

During a clean-water calibration for a hand can used on structural pest jobs, 6 fl oz are collected in 45 seconds. What is the output per minute?

12 fl oz per minute.6 fl oz per minute.4.5 fl oz per minute.8 fl oz per minute.

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D. 8 fl oz per minute.

Output = 6 ÷ 45 × 60 = 8 fl oz per minute. Scaling by elapsed time is necessary before using the result to plan application delivery.

Q20Biology and Characteristics of Insects and Arthropods

An inspector finds a spider without a prey-catching web. What conclusion is justified?

A spider without a web must feed on stored grain.The animal cannot be a spider because no web is visible.Some spiders use silk for shelters and protected egg sacs.No silk means the room contains no arthropod predators.

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C. Some spiders use silk for shelters and protected egg sacs.

Not every spider captures prey in a web. Silk can have other functions, so hunting behavior does not exclude spider identity.

General Pest Control: A Study Guide for Commercial Applicators (OSU 841-10A / e841-10A, Category 10a; 2025 edition; supplied revision file 2026-07-10) · Ch. 6 Biology and Characteristics of Insects and Arthropods · p. 48

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What the Ohio 10A General Pest Control exam covers

Review the category manual chapters below. Each entry shows the practice questions available for that topic. Tap a chapter to practice just that topic; these counts are not official exam weights.

02Pest Management Concepts and Approaches2 Pest Management Concepts and Approaches2 Q →04Application Equipment: Types, Use, and Maintenance4 Application Equipment: Types, Use, and Maintenance3 Q →05Pest Management in Specialized Facilities5 Pest Management in Specialized Facilities3 Q →07Cockroaches7 Cockroaches2 Q →09Stored-Product and Fabric Pests9 Stored-Product and Fabric Pests1 Q →10Silverfish, Firebrats, and Book Lice10 Silverfish, Firebrats, and Book Lice2 Q →14Spiders14 Spiders1 Q →03Detecting, Identifying, and Monitoring Pests3 Detecting, Identifying, and Monitoring Pests1 Q →06Biology and Characteristics of Insects and Arthropods6 Biology and Characteristics of Insects and Arthropods1 Q →08Ants8 Ants1 Q →11Parasites: Bed Bugs, Lice, Fleas, and Ticks11 Parasites: Bed Bugs, Lice, Fleas, and Ticks1 Q →12Flies, Gnats, and Midges12 Flies, Gnats, and Midges1 Q →01Laws and Regulations for Commercial Applicators1 Laws and Regulations for Commercial Applicators1 Q →

How to prepare for the Ohio 10A General Pest Control exam

Ohio Category 10A General Pest Control prepares candidates for general structural and household pest work. The category examination contains 150 questions, with a 70% passing score. Preparation involves more than recognizing a pest photograph: you need to connect identification with inspection findings, food and shelter sources, development stages and suitable control methods. Check the Ohio Department of Agriculture category descriptions before selecting your examinations so that your intended work fits the certification you are pursuing.

Study General Pest Control: A Study Guide for Commercial Applicators, OSU e841-10A, 2025 edition. OSU identifies this updated manual with the examination introduced April 1, 2025. Its product page also directs readers to replacement corrections for printed pages 1 and 207. Check those official corrections against your copy before studying. Read Chapter 1 on laws and regulations as part of the full category manual even though this practice bank concentrates on pest and application knowledge.

Use Chapters 2 and 3 to organize your inspection and monitoring process. Then review Chapter 4 on application equipment, Chapter 5 on specialized facilities and Chapter 6 on insect and arthropod biology. Practice calculating delivery rates and mixture quantities while keeping weight and fluid measures separate. For sensitive facilities, consider how occupants, food, equipment and potential exposure affect the treatment decision. Write down the inspection evidence needed before selecting a product or an application method.

Work through the pest chapters in groups. Chapters 7 through 10 cover cockroaches, ants, stored-product and fabric pests, and silverfish, firebrats and book lice. Chapters 11 through 14 address parasites, flies and related pests, stinging insects and spiders. Finish with occasional and fall invaders, wood-destroying insects, and rats, mice and voles in Chapters 15 through 17. Compare similar pests by habitat, damage, life cycle and monitoring clues. Learning to recognize a wood-destroying insect does not by itself establish authorization for every treatment; consult ODA about category boundaries for the work you plan.

You must also pass Commercial Core for Ohio commercial certification. Keep Core safety, label and legal study alongside your category reading. The questions here are original study aids, not released ODA questions. The free question set here is smaller than the official 150-question examination, so the mock exam is shorter. Use it to locate weak topics, then return to the full manual rather than treating one practice run as complete exam coverage.

ODA inspectors supervise closed-book examinations at Ohio test sites, and the examination fee is $0. License charges are separate. Follow the ODA applicator-exams source below for official registration and current session rules. Ask ODA about the time allowance and appointment requirements when you book; we have not established a category-specific time limit. Rehearse answering without reference materials so that your study habits match the closed-book setting.

A study plan that works

Get the manual Ohio names. General Pest Control: A Study Guide for Commercial Applicators (e841-10A) is the book this exam is written from. Read a chapter, then practice it here.
Work one chapter at a time. Use the chapter list above to practice by topic. Questions you miss are saved, so finish each session with “Missed only”.
Prepare for Commercial Core as well. Ohio commercial certification requires Commercial Core alongside your category exam. Use the Core exam page and official Core materials for that separate study track.
Take mock exams. Aim to score comfortably above 70% before you book. The chapter breakdown shows where to go back to.
Book the exam. Exams are given by Ohio Department of Agriculture inspectors at Ohio test sites. It’s closed-book, so the manual stays home. Confirm the current format and fees when you register.

Manuals & official sources

Closed-book exam. Exams are given by Ohio Department of Agriculture inspectors at Ohio test sites.

Manual General Pest Control: A Study Guide for Commercial Applicators (e841-10A), 2025 edition

Ohio 10A General Pest Control exam FAQ

What is the Ohio 10A exam format?

There are 150 questions, with a 70% passing score. ODA inspectors supervise closed-book testing at Ohio test sites; the examination fee is $0, separate from licensing costs.

Do I need Commercial Core as well as 10A?

Yes. Ohio commercial applicants must pass Commercial Core as well as the category examination for their intended work.

Which 10A manual and corrections should I use?

Use General Pest Control: A Study Guide for Commercial Applicators, e841-10A, 2025 edition. Check the OSU product page for replacement corrections to printed pages 1 and 207 and compare them with your copy.

Why is the practice mock shorter than 150 questions?

The category bank has 120 questions. The mock uses the available questions without repeating them, so it is shorter than the official 150-question exam.

Where do I register for the official exam?

Use the Ohio Department of Agriculture applicator-exams page linked in the sources below. Confirm the session instructions and time allowance directly with ODA.

More Ohio exams

Commercial CoreCommercial Core90 Q · Pass 70%6A Ornamental Pest ControlOrnamental Pest Control50 Q · Pass 70%

Core practice in other states

North CarolinaCore exam100 Q · Pass 70%FloridaCore exam50 Q · 120 min · Pass 70%TexasGeneral Standards examPass 70%IowaCore examPass 80%