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Seat No.: Enrolment No.
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI(NEW) - EXAMINATION - SUMMER 2019
Subject Code:2161407 Date:21/05/2019
Subject Name:Food Plant Utilities & Sanitation
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) “Water is life line of food processing plant.” Justify? 03
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(b) What is role of economizer and optimizer in the boiler? 04
(c) Distinguish between: 07
- Cleaning and sanitation
- CIP and COP
Q.2 (a) Why metal brushes are not used in the food industry? 03
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(b) What are the main problems caused by the presence of Fe and Mg in water. 04
(c) Define boil corrosion. Explain the need and methods of treatment of boiler feed water. 07
OR
(c) Explain the process and biochemical reactions involved in chlorination of water. 07
Q.3 (a) What are the different utilities of the food plant? 03
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(b) What is draught? Discuss its usefulness in boiler operation? 04
(c) List different boiler accessories and auxiliaries? Discuss their role? 07
OR
Q.3 (a) Justify the replacement of all the bulbs at a time even not fused in the food industry? 03
(b) State the functions of complex polyphosphate and alkali in detergent formulation. 04
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(c) Explain the activated sludge process with neat sketch. 07
Q.4 (a) What are the ideal properties of good cleaner? 03
(b) Briefly describe the construction of trickling filter. 04
(c) Explain working of any one type of boiler used in the food industry. 07
OR
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Q.4 (a) Enlist the various ways to reduce the BOD of effluent generated in food industry. 03
(b) Briefly explain the basic steps of equipment cleaning in food industry. 04
(c) State the different sources of water and give the detail classification of water on the basis of hardness. 07
Q.5 (a) State the advantages of anaerobic process over aerobic process in relation to the waste treatment. 03
(b) Explain how the utilities affect the plant size? 04
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(c) Explain the ion exchange method of water softening. 07
OR
Q.5 (a) “Stagnant water is more contaminated as compared to running water”. Justify the statement with scientific reason(s). 03
(b) Define effluent and state the different ways to minimize the solid wastes in the waste water of food plant. 04
(c) Explain the features of automatic CIP process. 07
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