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:
The rated nozzle flow rate and volume median diameter (VMD) of droplets of a hydraulic sprayer are 1.0 L min⁻¹ and 200 µm, respectively at the rated pressure of 500 kPa. If the desired nozzle flow rate is 1.5 L min⁻¹, the droplet diameter in µm will be ______
Official Answer Key:
152 to 153
Step-by-Step Solution & Explanation
For a hydraulic (pressure) nozzle, flow rate varies with the square root of pressure: Q ∝ √P, so P₂ = P₁×(Q₂/Q₁)² = 500×(1.5)² = 1125 kPa. Droplet VMD for hydraulic nozzles varies with pressure as VMD ∞ ΔP^(−1/3). Hence d₂ = d₁×(P₁/P₂)^(1/3) = 200×(500/1125)^(1/3) = 200×0.7631 = 152.6 µm, within the accepted band 152–153.
Practice This in Real CBT Exam Interface
Test yourself with the official TCS-iON palette, virtual calculator, and immediate performance analytics.