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Seat No.: Enrolment No.
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- V (New) EXAMINATION — WINTER 2019
Subject Code: 2151406 Date: 25/11/2019
Subject Name: Technology of Grains
Time: 10:30 AM TO 01:00 PM Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) Explain the morphological structure of paddy grain. 03
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(b) What is return paddy? State the measures to minimize the quantity of 04 return paddy.
(c) Explain in detail about the air classification of wheat speciality flours. 07
Q.2 (a) Write the objectives of hydrothermal treatment to grains. 03
(b) Define conditioning of wheat and state its objectives. 04
(c) Explain the various pre-treatments required to oilseeds prior to oil 07 extraction.
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OR
(c) Why crude oil is not suitable for consumption? Explain the process of 07 refining of crude oil.
Q.3 (a) State the uses of hard and soft wheat. 03
(b) Enlist the equipment involved in milling of pulses and state their 04 importance.
(c) Briefly discuss the benefits of modern methods of milling of pulses over 07 traditional methods and explain the CFTRI method of pulse milling.
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OR
Q.3 (a) Enlist the post milling operations carried out on wheat flour. 03
(b) Explain the home scale traditional methods of pulse milling. 04
(c) Explain the various factors affecting milling characteristics of pulses. 07
Q.4 (a) Distinguish between the modern and conventional milling of paddy. 03
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(b) Explain in brief about the different rollers used in wheat milling. 04
(c) Explain the most appropriate drying process of paddy before storage and 07 milling.
OR
Q.4 (a) State the difference between floury and horny endosperm of corn. 03
(b) Briefly describe the dry milling process of corn starch extraction. 04
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(c) Enlist and explain the ideal wheat flour properties. 07
Q.5 (a) State the different methods of dhal polishing. 03
(b) Write the principle involved in extraction of oil by Mechanical and 04 Solvent Extraction Method. Explain the solvent extraction method oil extraction.
(c) What do you understand by the term ‘Supply Chain’? Explain the supply 07 chain of any one staple cereal cultivated in India.
OR
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Q.5 (a) Define/explain the terms: 03
- Carborandum
- Antinutritional factors
- Aspiration
(b) What is protein isolate? Give the flow chart of preparation of protein 04 isolate.
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(c) Write short notes on: 07
- Steeping of corn
- Types of corn
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