Practice Test Geeks(CPA) Certified Pesticide Applicator Practice Test
← All CPA Flashcard Decks

Pesticide Formulations and Adjuvants Flashcards

7 cards from real CPA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Pesticide Formulations and Adjuvants flashcards as text

  1. When reading a pesticide label that states 'add 2 oz per gallon of water,' which formulation type is this language MOST typical for?

    Answer: Emulsifiable concentrate (EC)

    Emulsifiable concentrates are liquid formulations mixed with water at specified rates, commonly expressed as fluid ounces per gallon.

  2. Which adjuvant type would BEST help a systemic herbicide penetrate a waxy leaf surface?

    Answer: Penetrant/activator surfactant

    Penetrant surfactants (activator adjuvants) reduce surface tension and improve absorption of systemic pesticides through waxy cuticles.

  3. A pesticide formulated as an 'ultra-low volume (ULV)' concentrate is intended to be applied:

    Answer: Undiluted or with very little dilution in very small volumes

    ULV formulations are applied at very low volumes (often undiluted), typically by specialized equipment such as aerial or thermal foggers.

  4. Why is continuous agitation typically required when using wettable powder (WP) formulations in a spray tank?

    Answer: Agitation keeps the suspended particles from settling to the bottom

    Wettable powder particles do not dissolve but remain suspended; without agitation they settle, causing uneven application.

  5. A 'suspension concentrate' (SC or flowable) formulation is best described as:

    Answer: Finely ground solid active ingredient suspended in a liquid carrier

    Suspension concentrates contain finely milled solid active ingredient particles suspended in water, forming a fluid that can be poured and diluted.

  6. Which of the following best describes a 'buffering agent' used as a pesticide adjuvant?

    Answer: A substance that adjusts and stabilizes the pH of the spray solution

    Buffering agents stabilize spray solution pH, which can affect the stability and efficacy of pH-sensitive pesticide active ingredients.

  7. The term 'percent active ingredient (%AI)' on a pesticide label refers to:

    Answer: The proportion of the total formulation that is the pesticidally active chemical

    Percent active ingredient indicates how much of the total formulation by weight is the actual pesticide chemical, with the rest being inerts and carriers.