Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III AGRICULTURAL PROCESS ENGINEERING Previous Question Paper (November/December - 2017 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is work index?
Answer
The Work Index is defined as the gross energy requirement in kilowatt-hours per metric ton of material required to reduce it from a theoretically infinite particle size to a size where 80% of the product passes through a 100-micrometer screen.
Explain the working of tumbling mill.
Answer
A tumbling mill consists of a rotating cylindrical shell partially filled with grinding media like steel balls or rods. As the shell rotates, the media are lifted by friction and then cascade or cataract down onto the feed material, causing size reduction through a combination of impact and attrition forces.
Explain the working of cyclone separator.
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Define terminal velocity.
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What is ideal screen?
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Explain constant pressure filtration process.
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Define threshing.
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List out the steps involved in rice milling.
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What is pneumatic conveying system?
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Explain different belt conveyor idlers.
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Part B
What are the principles of size reduction? Explain Rittinger’s, Kick’s and Bond’s laws.
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Explain the working of different crushers with neat sketches.
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Explain the working of attrition mill and buhr mill with diagrams.
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Explain the working of different cutting machines.
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Derive an expression for drag coefficient and terminal velocity.
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Explain the power requirement for liquid mixing.
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Explain the working of specific gravity separator with diagram.
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Explain the working of different agitators.
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Explain the importance of aerodynamic properties of agricultural produce.
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Derive an expression for effectiveness of screen separator.
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Explain the working of air screen cleaner.
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Explain the working of rotary filter with diagram.
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Explain constant rate filtration process with necessary equations.
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Explain different unit operations involved in pulse milling.
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Explain dry milling method in pulse milling with detailed flow chart.
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What is the importance of material handling system? Explain the selection/design of conveyor system.
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What are the different parboiling methods?
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Explain the pressure parboiling method.
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Explain the working of chain conveyor with a neat sketch.
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Explain the working of inclined and vertical screw conveyor with neat sketches.
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Explain different types of buckets used in bucket elevators.
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Explain design considerations of gravity conveyor.
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Explain the working of belt conveyor and inclined belt conveyor.
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