CPA Application Equipment and Calibration 2

Question 1

When calibrating a boom sprayer, you collect 980 mL from a single nozzle in 30 seconds while the sprayer travels at 5 mph.
Which component of the calibration process does this measurement directly represent?

Accepted Answer

Nozzle flow rate

Answer

Ground speed accuracy

Answer

Boom width coverage

Answer

Operating pressure uniformity

Question 2

A hydraulic agitation system on a spray tank is primarily used to:

Accepted Answer

Keep pesticide mixtures uniformly suspended

Answer

Increase pump pressure

Answer

Filter debris from the solution

Answer

Regulate nozzle output

Question 3

An applicator is using a backpack sprayer with a fan nozzle. To increase coverage width without changing nozzles, the applicator should:

Accepted Answer

Raise the nozzle higher above the target

Answer

Increase tank pressure

Answer

Lower the boom closer to the target

Answer

Increase walking speed

Question 4

Which type of pump is most commonly used in low-pressure ground sprayers for pesticide application and is known for its self-priming capability?

Accepted Answer

Roller pump

Answer

Centrifugal pump

Answer

Gear pump

Answer

Piston pump

Question 5

A strainer screen with a mesh size of 50 is coarser or finer than a screen with a mesh size of 100?

Accepted Answer

Coarser, because fewer openings per inch means larger holes

Answer

Finer, because fewer openings per inch means smaller holes

Answer

The same, mesh size does not indicate hole size

Answer

Coarser, because higher numbers always mean larger openings

Question 6

When checking nozzle uniformity across a boom, a 10% variation in output between nozzles is generally considered:

Accepted Answer

The threshold above which nozzles should be replaced or cleaned

Answer

Acceptable for all applications

Answer

A sign that all nozzles must be replaced immediately

Answer

Irrelevant because boom sprayers self-compensate

Question 7

An applicator calibrates a sprayer and finds it is applying 15% more pesticide per acre than the label specifies. The BEST corrective action is to:

Accepted Answer

Increase ground speed or reduce pressure to lower output

Answer

Add more water to the tank to dilute the mixture

Answer

Reduce the active ingredient concentration in the tank

Answer

Continue application since 15% over is within tolerance