When calibrating sprayers, you should replace the nozzle if the discharge rate varies by more than what percent from the average?

When calibrating sprayers, you should replace the nozzle if the discharge rate varies by more than what percent from the average?

• A. 5%
• B. 10%
• C. 20%
• D. 25%

Answer: (C)

Uniform spray coverage depends on every nozzle delivering roughly the same amount of liquid. During calibration you compare each nozzle’s discharge to the average, and if a nozzle differs by twenty percent or more, it should be replaced. This threshold catches nozzles that are worn, clogged, or malfunctioning, which would cause patches of over- or under-application and undermine efficacy and safety. Setting the tolerance at about twenty percent balances practicality with accuracy: smaller limits would lead to unnecessary replacements from normal wear, while larger limits would allow too much variation in the spray pattern. After replacing, recheck all nozzles to ensure they now meet the tolerance.

Uniform spray coverage depends on every nozzle delivering roughly the same amount of liquid. During calibration you compare each nozzle’s discharge to the average, and if a nozzle differs by twenty percent or more, it should be replaced. This threshold catches nozzles that are worn, clogged, or malfunctioning, which would cause patches of over- or under-application and undermine efficacy and safety. Setting the tolerance at about twenty percent balances practicality with accuracy: smaller limits would lead to unnecessary replacements from normal wear, while larger limits would allow too much variation in the spray pattern. After replacing, recheck all nozzles to ensure they now meet the tolerance.