CPA Study Guide 2026
Everything you need to pass the CPA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CPA Exam Format at a Glance
📚 CPA Topics to Study (21)
✍️ Sample CPA Questions & Answers
1. Under FIFRA, what is the primary reason the EPA classifies a pesticide as a Restricted Use Pesticide (RUP)?
The EPA classifies a pesticide for Restricted Use if it determines that, even when used according to label directions, it may cause unreasonable adverse effects on the environment or injury to the applicator or others. To mitigate this risk, its use is restricted to certified applicators or those under their direct supervision.
2. A pesticide has an oral LD50 of 5 mg/kg body weight. How would this pesticide be classified under EPA toxicity categories?
Category I (Highly Toxic) includes pesticides with oral LD50 values less than 50 mg/kg, which carry the DANGER signal word on the label.
3. Which signal word appears on a pesticide label when the product falls into EPA Toxicity Category II (moderately toxic)?
Category II products (oral LD50 of 50–500 mg/kg) require the signal word WARNING on the front panel of the label.
4. Fungicide resistance in plant pathogens is BEST managed by:
Using fungicides with different MOAs—either in alternation or premix combinations—prevents continuous selection on one target and slows resistance development.
5. Which of the following changes to sprayer setup would be most effective in reducing pesticide drift?
Low-drift nozzles, like air-induction or venturi nozzles, are specifically designed to produce larger, heavier droplets that are less likely to be carried away by wind. Increasing boom height, using nozzles that create fine droplets, and increasing pressure all tend to increase the potential for spray drift.