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:
Grain-to-straw ratio of 500 kg feed material is 3:2. Blown grain loss = 0.05%, separation loss = 0.5%, cleaning efficiency = 99.1%. Considering 100% threshing efficiency, find grain recovery at the main grain outlet (kg). (Rounded to 2 decimal places)
Official Answer Key:
298.30 to 298.40
Step-by-Step Solution & Explanation
Grain content in feed = 500×(3/5) = 300 kg. Grain recovered at the main outlet = Grain input × (1 − blown-loss fraction − separation-loss fraction) = 300×(1−0.0005−0.005) = 300×0.9945 = 298.35 kg (cleaning efficiency pertains to the cleaning/chaff outlet, not the main grain outlet loss accounting).
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