If the throttle setting remains constant, but the speed doubles, what happens to the amount of spray per acre?

• A. Doubles
• B. Remains constant
• C. Is reduced by 1/4
• D. Is reduced by 1/2

Answer: (D)

When the throttle setting remains constant, it indicates that the flow rate of the spray remains unchanged. However, if the speed of the application doubles, the area being covered in a given amount of time also doubles.

Calculating the spray amount per acre involves understanding the relationship between speed and the amount of product applied over that area. If the speed doubles, the time taken to cover one acre is halved. Since the flow rate does not change, but the time to cover the same area is reduced, the overall amount of spray applied over one acre is effectively reduced.

Therefore, when the speed is doubled, less product is applied per acre because you are passing over the area faster without increasing the amount being sprayed. This results in the spray being applied in a more diluted fashion over the acreage being treated. As a result, the amount of spray per acre is reduced by half, which aligns with the provided answer.