Subtopic: Functional requirements, principles of working, construction and operation of manual, animal, tractor and renewable energy operated equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting, harvesting and threshing
Question Statement:
In agricultural spray nozzles, Volume Median Diameter (VMD or $D_{v0.5}$) is defined as:
Options:
(A) The droplet diameter such that $50\%$ of the total spray volume is in droplets smaller than this diameter
(B) The numerical average of all droplet diameters
(C) The largest droplet diameter produced
(D) The nozzle orifice exit diameter
Answer Key:
A
Step-by-Step Solution & Explanation
VMD divides the spray volume equally: $50\%$ of liquid volume is in smaller droplets and $50\%$ in larger droplets.