Define aspiration and explain its role in grain cleaning.
[4 marks]Acrusher requires 5 kWh for grinding a material at the rate of 100 kg/h from 2 cm size to 5 mm size. How much power will be required, if the reduction is 2 mm using 1 Rittinger’s law and 2 Kick’s law.
[7 marks]Write the importance and objectives of Post Harvest Engineering of cereals, pulses, and oil-seeds.
[3 marks]Discuss various types of separators used in grain cleaning.
[3 marks]Sugar is ground from crystals of which it is acceptable that 80% passes a 500 μm sieve No. 35 to 88 μm No. 170 using a 5 HP motor. If the new product is 80% through 125 μm No. 120 sieve and throughput increased by 50%, check if the same motor suffices. Use Bond’s law.
[7 marks]List and explain different types of forces used in size reduction of food grains with suitable examples.
[4 marks]What is sieve analysis? Mention its importance in post-harvest technology. Differentiate between scalping and grading in cleaning operations.
[7 marks]Draw the structure of a grain with neat, labeled diagram and explain the functions of all its parts.
[3 marks]Discuss the types of mixers used for solids, liquids, and pastes with neat diagrams.
[7 marks]Write a short note on conditioning and parboiling of paddy.
[3 marks]Explain the theory of mixing of solids and pastes with suitable examples.
[4 marks]Explain traditional, CFTRI, Jadavpur, and Pressure parboiling methods in detail.
[7 marks]Define Mixing Index. Derive its formula and explain significance.
[4 marks]Explain the construction and working of rice milling plant with neat flow diagram. Page 1 of
[2 marks]Explain various size reduction laws Bond’s, Kick’s, and Rittinger’s and discuss their applications in food grain processing with suitable examples.
[7 marks]Differentiate between screw press and hydraulic press for oil extraction.
[3 marks]Explain the principle and factors affecting extrusion cooking.
[4 marks]With neat sketches, explain single-screw and twin-screw extruders.
[7 marks]Define parboiling and state objectives and advantages.
[3 marks]Explain oil extraction process from oilseeds using mechanical expeller with flow chart.
[3 marks]Describe solvent extraction and refining of edible oils.
[4 marks]Discuss various types of dryers used for grains e.g., batch, continuous, fluidized bed, and solar dryers.
[7 marks]Explain the effect of drying on the nutritional and physical quality of cereals and pulses.
[3 marks]Describe packaging materials used for storage of cereals, pulses, and oilseeds and explain MAP Modified Atmosphere Packaging.
[4 marks]Discuss recent government schemes PM-FME, PMKSY and FPO initiatives for post- harvest infrastructure and farmer support. Page 2 of
[2 marks]