Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2161401 Food Process Equipment Design Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2161401 Date:10/05/2019
Subject Name:Food Process Equipment Design
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Draw the diagram of plate with all notations.
03
(b) List out different material handling equipments. Discuss the working of any one of
them.
04
(c) What is power number? Develop its equation and discuss its significance in the process
of agitation.
07
Q.2 (a) Discuss the followings;
1. Rising film evaporator with advantages and disadvantages
2. Falling film evaporator with advantages and disadvantages
03
(b) When two fluids of the heat exchanger are separated by a plane wall, then derive the
following equation.
o i
h k h
U
1 1
1
? ?
?
?
04
(c) Derive the equation of effectiveness for parallel flow. 07
OR
(c) Why counter flow arrangement is more effective than parallel flow? Prove that
?
?
?
?
?
?
?
?
? ? ? ?
?
h c
UA
c h c h
C C
e T T T T
1 1
) (
2 1 1 2
07
Q.3 (a) What do you understand by factor of safety? Explain with example?
03
(b) Ambient air (dry bulb 27
o
C and wet bulb 18
0
C) is heated to 70
o
C and fed in to the
drying chamber of LSU dryer to dry parboiled paddy. If the air coming out of the dryer
has temperature of 54
o
C and its wet bulb temperature is 37
o
C. Evaluate the LSU dryer
performance? How it can be improved.
04
(c) Discuss possible material hazards in fruits and vegetable processing industry. Suggest
precautions should be taken to overcome the same.
07
OR
Q.3 (a) Differentiate between AMTD and LMTD. Give the limitations of AMTD
03
(b) What are factors affecting overall heat transfer coefficient?
04
(c) A solution containing 5% solute by weight is to be concentrated to 15% at the rate of
2000 kg/hr. The feed solution is introduced in the evaporator at 40
0
C and steam at
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2161401 Date:10/05/2019
Subject Name:Food Process Equipment Design
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Draw the diagram of plate with all notations.
03
(b) List out different material handling equipments. Discuss the working of any one of
them.
04
(c) What is power number? Develop its equation and discuss its significance in the process
of agitation.
07
Q.2 (a) Discuss the followings;
1. Rising film evaporator with advantages and disadvantages
2. Falling film evaporator with advantages and disadvantages
03
(b) When two fluids of the heat exchanger are separated by a plane wall, then derive the
following equation.
o i
h k h
U
1 1
1
? ?
?
?
04
(c) Derive the equation of effectiveness for parallel flow. 07
OR
(c) Why counter flow arrangement is more effective than parallel flow? Prove that
?
?
?
?
?
?
?
?
? ? ? ?
?
h c
UA
c h c h
C C
e T T T T
1 1
) (
2 1 1 2
07
Q.3 (a) What do you understand by factor of safety? Explain with example?
03
(b) Ambient air (dry bulb 27
o
C and wet bulb 18
0
C) is heated to 70
o
C and fed in to the
drying chamber of LSU dryer to dry parboiled paddy. If the air coming out of the dryer
has temperature of 54
o
C and its wet bulb temperature is 37
o
C. Evaluate the LSU dryer
performance? How it can be improved.
04
(c) Discuss possible material hazards in fruits and vegetable processing industry. Suggest
precautions should be taken to overcome the same.
07
OR
Q.3 (a) Differentiate between AMTD and LMTD. Give the limitations of AMTD
03
(b) What are factors affecting overall heat transfer coefficient?
04
(c) A solution containing 5% solute by weight is to be concentrated to 15% at the rate of
2000 kg/hr. The feed solution is introduced in the evaporator at 40
0
C and steam at
07
2
110
0
C. Product boils in the evaporator at 100
0
C. Determine heat transfer area of the
evaporator. The overall heat transfer is 1220.63 kCal/m
2 0
C.
Q.4 (a) What are different subsidiary loads considered while designing pressure vessels? What
is their influence in Indian condition?
03
(b) Discuss turbine agitator and what are its dimensional limitations?
04
(c) What are the different types of an agitator used in the food industry? Which type of
agitator you will recommend for the bakery kneading purpose and why?
07
OR
Q.4 (a) Sketch different types of pressure vessel heads used for low pressure.
03
(b) Why boiling point elevation is? Describe the Duhring lines with help of diagram.
04
(c) In an open heart surgery under hypothermic conditions, the patient?s blood is cooled
before the surgery and rewarmed afterwards. The task is accomplished by a concentric
tube counter flow heat exchanger of length 500mm with a thin walled inner tube of
60mm diameter. The blood entering the heat exchanger at 20
0
C and 0.05 kg/s is
warmed by water at 60
0
C and 0.12 kg/s. Determine the temperature of blood at exit
from the heat exchanger and the heat flow rate. Assume the following data;
C
p
of blood = 3500 J/KgK , C
p
of water = 4186 J/KgK, U
0
= 475 W/m
2
K
07
Q.5 (a) Discuss the followings
1. Temperature profile for crossed flow (mixed type)
2. Steam economy
03
(b) Discuss U and Z arrangement of Plate heat exchanger with diagram.
04
(c) Derive the energy balance equation for single effect evaporators.
cs s p p v v vs s f f
H m H m H m H m H m ? ? ? ? ? ?
1 1
07
OR
Q.5 (a) Describe Heat Capacity ratio, Steam economy and Fouling factor.
03
(b) Calculate the safe stress for stainless steel operated at 106
o
C with randomly checked
butt joint and safety factor of 1.8. The material has allowable stress at 25, 70 and 120
o
C
as 200, 142 and 106 N/mm
2
respectively.
04
(c) A steel pipe of 25mm of internal diameter and 30mm outer diameter is carrying a steam
at 121
0
C. The convective heat transfer coefficient due to steam flow is 5000 w/m
2
K.
The steel pipe has a glass wool insulation of 10mm thickness on the outer side. The
near stagnant air is at 30
0
C on the outer side insulation provides a heat transfer
coefficient of 10W/m
2
K. The thermal conductivity of steel and insulation are 43 and
0.031 W/mk respectively. Calculate the overall heat transfer resistance based on inside
surface area of pipe at every meter length.
07
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This post was last modified on 20 February 2020