National Core Manual questions, Ohio law questions and free sample questions written from OSU Bulletin 825. Not every Ohio rule is covered.
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Extra wetting agent may increase runoff or plant injury. It does not by itself establish greater persistence or potency, or lower volatility.
National Core Manual, 2nd ed., 2014 · Ch. 4 Pesticide Formulations · p. 80
Security and protection from flooding and water entry support safe storage. Delivery space, shared feed storage, or collection access does not provide that combination of safeguards.
National Core Manual, 2nd ed., 2014 · Ch. 8 Transportation, Storage, and Security · p. 141
A soluble powder dissolves to form a solution. Finer suspended particles, liquid droplets, and coated solids are not true dissolution.
National Core Manual, 2nd ed., 2014 · Ch. 4 Pesticide Formulations · p. 74
A directed spray aims at the target while limiting contact with nearby desirable plants. A band, space, or broadcast application describes a different placement pattern.
National Core Manual, 2nd ed., 2014 · Ch. 11 Pesticide Application Procedures · p. 173
10 lb/acre × 2.25 acres = 22.5 lb. Adding 10 and 2.25 gives 12.25 but does not apply the per-acre rate.
National Core Manual, 2nd ed., 2014 · Ch. 11 Pesticide Application Procedures · p. 181
Cooler work periods, shade breaks, and drinking water help address heat burden while required PPE is maintained. Delayed breaks or water and reliance on odor do not adequately manage that burden.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 99
Systemic activity involves absorption and movement within the weed. Contact, residual, and repellent activity do not describe that internal movement.
National Core Manual, 2nd ed., 2014 · Ch. 1 Pest Management · p. 22
A resistant variety uses inherited resistance, making this genetic control. It does not introduce natural enemies, pesticides, or physical barriers.
National Core Manual, 2nd ed., 2014 · Ch. 1 Pest Management · p. 23
The greatest acute systemic or contact hazard determines the signal word. An average, the most common exposure route, or the amount applied does not replace that basis.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 91
Pest observations linked to tactics, timing, and results support evaluation of the program. Purchasing, maintenance, and billing records alone do not show how well pests were controlled.
National Core Manual, 2nd ed., 2014 · Ch. 1 Pest Management · p. 30
Wettable powders disperse as undissolved solid particles that need agitation. Dissolved material, oil droplets, and coated capsules describe other mixtures.
National Core Manual, 2nd ed., 2014 · Ch. 4 Pesticide Formulations · p. 74
Measuring and pouring concentrate is mixing/loading, so that task's PPE list, including the apron, applies. The other lists address different tasks.
National Core Manual, 2nd ed., 2014 · Ch. 6 Personal Protective Equipment · p. 106
Under 901:5-11-08(B), each category requires at least one-half hour of approved training to avoid reexamination in that category. A single hour concentrated in the most-used category leaves the other categories uncovered.
Ohio Administrative Code Chapter 901:5-11 · Ch. 901:5-11-08(B)
The intended site is turf, so its rate and instructions apply. The shrub rate, an average, or the higher listed rate is not established for this lawn use.
National Core Manual, 2nd ed., 2014 · Ch. 10 Planning the Pesticide Application · p. 159
A horizontal smoke layer suggests stable inversion conditions with limited vertical mixing. It does not indicate strong upward dispersion, increasing wind, or droplet evaporation.
National Core Manual, 2nd ed., 2014 · Ch. 7 Pesticides in the Environment · p. 126
An emulsifiable concentrate uses an emulsifier to disperse oil droplets in water. The other formulations dissolve or disperse solids rather than forming this emulsion.
National Core Manual, 2nd ed., 2014 · Ch. 4 Pesticide Formulations · p. 67
Control, containment, and cleanup proceed in that order when safe. Collecting the spill before stopping or containing it can allow continued release or spread.
National Core Manual, 2nd ed., 2014 · Ch. 9 Emergency or Incident Response · p. 153
The loose closure and exterior residue need correction to avoid leakage and exposure. The other findings describe suitable container or loading conditions.
National Core Manual, 2nd ed., 2014 · Ch. 8 Transportation, Storage, and Security · p. 140
40 gal/acre × (4 mph ÷ 2 mph) = 80 gal/acre. Halving speed doubles time over each acre, so the volume doubles rather than halves.
National Core Manual, 2nd ed., 2014 · Ch. 11 Pesticide Application Procedures · p. 178
An antidote must be appropriate for the pesticide, and misuse can be dangerous. It is not a preventive tolerance treatment, and similar symptoms or severity alone do not identify the right antidote.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 99
Take a full mock exam (90 Q · Pass 70%). No hints until you submit, then a chapter-by-chapter score.
The questions above are a free sample. The pass opens the full Commercial Core bank, written chapter by chapter from the current manual.
$29 for 90 days or $49 for 12 months. One payment, no renewal.
Review the national core manual topics 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.
Expect several questions on what the signal word tells you. It reflects the product’s acute toxicity by its most hazardous route of exposure (swallowed, through the skin or inhaled) or its potential for eye and skin injury. It says nothing about long-term effects.
LD50 is the dose that killed half the test animals, in milligrams per kilogram of body weight. The smaller the number, the less it takes, so the more toxic the product.
Skull and crossbones; “poison” in red. Based on oral, dermal or inhalation toxicity.
No skull and crossbones. Can cause permanent damage to skin, eyes or lungs.
Or moderate eye and skin irritation.
Or slight eye and skin irritation. Class IV products need no signal word, though many still say CAUTION.
Labels name the formulation by its letters. Know what each one is and what it needs in the tank: agitation, extra care with dust, or nothing at all.
| Code | Formulation | Remember |
|---|---|---|
| EC / E | Emulsifiable concentrate | Oil-based liquid that forms a milky emulsion in water. |
| S | Solution | Dissolves completely; little or no agitation needed. |
| RTU | Ready-to-use | Already diluted; apply as packaged. |
| F / AF | Flowable | Solid particles suspended in liquid; needs agitation. |
| A | Aerosol | Active ingredient in a solvent, usually at a low percentage. |
| D | Dust | Dry, fine particles; high drift and inhalation risk. |
| G | Granules | Applied dry, often with a spreader; low drift. |
| P / PS | Pellets | Like granules, but particles are uniform in weight and shape. |
| WP / W | Wettable powder | Suspends in water; constant agitation; inhalation risk while mixing. |
| WDG / DF | Water-dispersible granules / dry flowable | Like a wettable powder with less dust. |
| SP / WSP | Soluble powder | Dissolves in water to form a true solution. |
| B | Bait | Active ingredient mixed with food or another attractant. |
| M | Microencapsulated | Coated particles or droplets mixed with water and sprayed; can release slowly. |
Most core exams include a few math questions. They rarely need more than multiplication and division, but units trip people up. Write every unit down and cancel it as you go.
The label rate is 2 pints per acre. Your sprayer is calibrated to apply 20 gallons per acre and the tank holds 100 gallons. How much product goes in a full tank?
A lawn measures 150 ft × 100 ft. The label calls for 1.5 fl oz per 1,000 sq ft. How much product do you need?
Ohio Commercial Core tests general pesticide application knowledge through 90 closed-book questions, and the Ohio Department of Agriculture (ODA) requires 70% to pass. ODA treats Core and category examinations separately, so identify your application category before ordering books. Ornamental Pest Control is Category 6A, turf applications fall under Category 8, and General Pest Control is Category 10A. Use ODA's commercial applicator page to match your intended work to the right category and plan that study alongside Core.
Order the Commercial Core Manual Bundle from Ohio State University: 825B in print or e825B as a paid PDF. The bundle brings together Applying Pesticides Correctly, Ohio pesticide laws and rules, and the Safety Training Guide for Trained Servicepersons. OSU lists the Core text as copyright 1990, reprinted March 31, 2020, and the safety guide as copyright 2023. The listed prices are $25.50 for print and $16.75 for the PDF. Chapter sample tests are included in the purchased material; use them to identify sections that need another reading.
For legal requirements, open ODA's current Laws and Rules page and review ORC Chapter 921 and OAC Chapter 901:5-11. Check effective dates so you distinguish rules already in force from future changes. If you use free background readings, check their dates and scope: Wyoming Extension's Core adaptation is based on OSU Bulletin 825 from 1992, and OSU's free safety guide dates to 2007/2011. Use those older publications for fundamentals, then return to the current Ohio bundle and ODA's law page for your state preparation.
The practice here combines national core manual questions, Ohio law questions and sample questions written chapter by chapter from OSU Bulletin 825; use the current Ohio bundle and official laws and rules for the full Ohio syllabus and state requirements. Review labels, safety precautions, equipment decisions and calculations in small groups. After each set, explain your mistakes in your own words and find the matching section in your reading. Keep a separate list of Ohio legal details to revisit rather than assuming a strong general practice score means you have finished studying state law or your category.
ODA inspectors supervise exams at Ohio testing locations. ODA lists no examination fee, while license application fees are separate. Its exam page says a session allows time for multiple examinations; ask ODA about the time available for your planned combination when arranging attendance. Use that page for registration and session instructions instead of choosing a Core countdown from another state's exam. Before traveling, check your appointment details, make sure you selected Commercial Core and the intended categories, and prepare to answer without consulting books.
Closed-book exam. Exams are given by Ohio Department of Agriculture inspectors at Ohio test sites.
Manual Applying Pesticides Correctly / Commercial Core Manual Bundle (825B / e825B), Core ©1990; reprinted March 31, 2020; safety guide ©2023
Manual Ohio Pesticide Laws and Rules, Current effective ORC Chapter 921 and OAC Chapter 901:5-11
ODA lists 90 questions, 70% to pass, closed-book testing and no examination fee; license application fees are separate. Ask ODA how much time is available for your exams. The on-site session allows multiple exams. Current Core bundle: 825B print $25.50 / e825B PDF $16.75. The free Wyoming adaptation derives from OSU 825 (1992), and the free OSU safety guide is ©2007/2011; use them for background study alongside the current bundle. Use the ODA pesticides/laws-and-rules URL for current law, not the obsolete plant-health/laws-and-rules link.
ODA lists 90 questions and a 70% passing score for Commercial Core.
Ohio examinations are closed book. Read the ODA applicator-exams instructions for the session you register for.
ODA lists no examination fee. The license application fee is separate; free testing does not mean a free license.
The designated bundle is 825B in print ($25.50) or e825B as a paid PDF ($16.75). It includes the Core text, Ohio laws and rules, and the safety training guide. The catalog lists Core ©1990, reprinted March 31, 2020, and safety guide ©2023.
Use ODA's current Laws and Rules page for ORC Chapter 921 and OAC Chapter 901:5-11. The OSU Commercial Core Manual Bundle also includes Ohio pesticide laws and rules.