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Sprayer Equipment and Calibration Questions (Free, with Answers)

10 free practice questions on application equipment and calibration for the pesticide applicator core exam: nozzles, pumps, agitation, calibration, and equipment care. Every question has an explanation. These are original questions written from the federal core standard, not actual exam items.

1. Calibration is the process of:

Answer: A. Calibration confirms the equipment delivers the labeled rate over the intended area.

2. As spray nozzles wear, their output usually:

Answer: C. Worn nozzle orifices enlarge, increasing flow and distorting the pattern. Replace nozzles whose output is off by more than about 10% from a new nozzle's.

3. A flat-fan nozzle is commonly used for:

Answer: C. Flat-fan tips give a tapered pattern designed to overlap evenly on a boom for broadcast applications.

4. Which nozzle material generally resists wear the LEAST?

Answer: C. Brass is inexpensive but wears quickly, especially with abrasive formulations like wettable powders.

5. What is the purpose of the agitation system in a sprayer tank?

Answer: A. Agitation keeps suspensions and emulsions uniform so every part of the tank is applied at the correct concentration.

6. Equipment should be recalibrated when:

Answer: C. Any change in nozzles, pressure, ground speed, or formulation can change output.

7. Strainers and screens in a sprayer:

Answer: D. Filters protect the pump and nozzles from particles and help keep output uniform.

8. A check valve (anti-drip valve) on a boom helps:

Answer: A. Check valves close when pressure drops, preventing drips and unintended application at the ends of passes.

9. Before each use, application equipment should be inspected for:

Answer: D. Pre-use inspection prevents leaks, spills, and uneven or incorrect application.

10. Rinsate from cleaning a sprayer should be:

Answer: A. Rinsate is still pesticide. Apply it to a labeled site at or below the label rate, or manage it as the label and regulations allow.
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