Texas Pesticide Applicator Practice Exam

What is the nozzle delivery rate in gallons per minute (GPM) if thirty-two ounces of water was collected from one spray nozzle in 30 seconds?

1. 0.25 GPM

2. 0.5 GPM

3. 1 GPM

4. 2 GPM

The correct answer is: 0.5 GPM

To determine the nozzle delivery rate in gallons per minute (GPM) when 32 ounces of water is collected in 30 seconds, first, convert the volume of water collected from ounces to gallons. There are 128 ounces in one gallon, so: 32 ounces ÷ 128 ounces/gallon = 0.25 gallons. Next, since the collection occurred over 30 seconds, we need to convert that time into minutes. There are 60 seconds in a minute, so: 30 seconds ÷ 60 seconds/minute = 0.5 minutes. Now, calculate the delivery rate in gallons per minute using the formula: Delivery Rate (GPM) = Gallons collected ÷ Time in minutes. Using the values obtained: Delivery Rate (GPM) = 0.25 gallons ÷ 0.5 minutes = 0.5 GPM. Thus, the correct answer reflects the accurate calculation of the nozzle's water delivery rate, confirming that the nozzle delivers water at a rate of 0.5 gallons per minute. This approach emphasizes the importance of conversions and unit understanding for accurate results in practical pesticide application scenarios.