Download GTU BE/B.Tech 2019 Winter 5th Sem New 2151402 Food Process Instrumentation And Control Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER- V (New) EXAMINATION - WINTER 2019

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Subject Code: 2151402

Subject Name: Food Process Instrumentation & Control

Date: 04/12/2019

Time: 10:30 AM TO 01:00 PM

Total Marks: 70

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

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(a) Write short notes on followings; (07)

1. Significance of specific gravity measurement.
2. Different types of flow.
3. Partially immersed thermometer

(b) Discuss the working of Efflux viscometer with diagram. (07)

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Q.2

(a) Discuss the working of following instrument; (07)

1. Vapour pressure thermometer
2. Constant volume thermometer

(b) Draw only neat diagram of the followings (07)

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1. Magnetic Flow meter
2. Target flow meter

Q.3

(a) Explain different types of flow. Describe the working of Rotameter. (07)

(b) What do you understand by direct and indirect method of liquid level measurement? Discuss float gauge and purge method in detail with diagram. (07)

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OR

(b) A McLeod gauge has volume of bulb, capillary and tube down to its opening equal to 95cm³ and a capillary diameter of 1.5mm. Calculate the pressure indicated by a reading of 55cm. (07)

Q.4

(a) Justify with facts that why platinum is used in RTD. (07)

(b) Describe the working of LVDT type hydrometer with diagram. (07)

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OR

(a) Discuss resistance strain gauge. Show with diagram about balance and unbalance bridge. (07)

(b) (i) Explain the working principle of bimetallic strip with detailed diagram. (04)

(ii) Draw the diagram of different elements used in pressure measurement. (03)

Q.5

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(a) Discuss inclined manometer with diagram. (07)

(b) Discuss the See Beck and Peltier effect. Explain the laws of thermocouple with diagram. (07)

OR

(a) Define the following terms: (07)

1. Sensitivity drift

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2. Range
3. Span

(b) Explain Feedback control loop in detail. (07)

Q.6

(a) Solve the following: 2y"+3y'-2y=te^-2t ,where y(0)=0, y'(0)=—2 (07)

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(b) Draw ratio control loop for a reactor having two reactant and the proportion of both is to be maintained 1:3. (07)

OR

(a) Define the terms: (07)

1. Error
2. Resolution

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3. Sensitivity

(b) Explain step by step approach of drawing Bode diagram by taking any one example. (07)

Q.7

(a) What is a transfer function? Explain the term in detail by taking any one system as an example. (07)

(b) Write a short note on cascade control loop by taking one example. (07)

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OR

(a) Explain the system of two interacting tanks in detail with transfer function. (07)

(b) Define Laplace transform of function f(t). What would be the Laplace of d²x/dt²? (03)

(c) Find Laplace transform of f(t)= cos kt*u(t) , t>0, Where, u(t) is a unit step function (04)

Q.8

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(a) What are the importance of temperature measurement in food industry. Find transfer function for mercury in glass thermometer system. (07)