Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 2171401 Food Standards And Quality Assurance Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2171401 Date:10/05/2019
Subject Name:Food Standards and Quality Assurance
Time:02:30 PM TO 05:00 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) Answer the following briefly:
i. Define gustation
ii. Calculate the degrees of freedom Poisson?s distribution.
iii. Define ? and ? risk
03
(b) Match the entities of Column-I with most appropriate entities of Column-II.
S.No. Column-I Column-II
1. Simple hypothesis is Prof. R.A Fisher
2. Addition law of probability Consistent
3. Olafaction Product difference
4. Theory of Estimation Smell
5. Triangle test Reject hypothesis
6. Sufficient estimator is H: {? = 6 & ?
2
= 16}
7. Critical region Mutually exclusive events
8. Normal distribution d.f. = 2
04
(c) What are seven principles of HACCP? Discuss each one with its importance. 07
Q.2 (a) Define Null Hypothesis. Explain the possible errors during testing of a statistical
hypothesis. Explain which type of error is considered as more risky in quality
control and why?
03
(b) What is critical region? Let ?(h) be the probability distribution function of
accepting the Null hypothesis Ho
when it is true;
Show that ?(h) = 1- ?(h) ;
where, ?(h) = P (x ? S- ? ?h) or P(S- ? ?h) and h ? H and ? is the region of
sample space S where Ho is rejected. Which function [? (h) or ? (h)] would you
maximize? Why and how?
04
(c) If Oi and Ei be the set of observed and expected frequencies (i = 1, 2, 3, 4??n)
for a data set of size N, prove that
?
?
?
?
?
?
?
?
? ?
n
i
i
i
N
E
O
1
2
2
? .
The expected and observed weekly sales data for a newly launched snack food
in a metropolitan city at five locations (L1, L2,L3,L4 and L5) is given below:
City L1 L 2 L 3 L 4 L 5
Expected sales in units/week 165 175 118 185 85
Observed sales in units/week 152 184 100 170 78
(i) What is the actual mean daily sale of the product?
(ii) Are observed and expected sales in significant agreement with each other?
Comment logically at 5% significance level.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2171401 Date:10/05/2019
Subject Name:Food Standards and Quality Assurance
Time:02:30 PM TO 05:00 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) Answer the following briefly:
i. Define gustation
ii. Calculate the degrees of freedom Poisson?s distribution.
iii. Define ? and ? risk
03
(b) Match the entities of Column-I with most appropriate entities of Column-II.
S.No. Column-I Column-II
1. Simple hypothesis is Prof. R.A Fisher
2. Addition law of probability Consistent
3. Olafaction Product difference
4. Theory of Estimation Smell
5. Triangle test Reject hypothesis
6. Sufficient estimator is H: {? = 6 & ?
2
= 16}
7. Critical region Mutually exclusive events
8. Normal distribution d.f. = 2
04
(c) What are seven principles of HACCP? Discuss each one with its importance. 07
Q.2 (a) Define Null Hypothesis. Explain the possible errors during testing of a statistical
hypothesis. Explain which type of error is considered as more risky in quality
control and why?
03
(b) What is critical region? Let ?(h) be the probability distribution function of
accepting the Null hypothesis Ho
when it is true;
Show that ?(h) = 1- ?(h) ;
where, ?(h) = P (x ? S- ? ?h) or P(S- ? ?h) and h ? H and ? is the region of
sample space S where Ho is rejected. Which function [? (h) or ? (h)] would you
maximize? Why and how?
04
(c) If Oi and Ei be the set of observed and expected frequencies (i = 1, 2, 3, 4??n)
for a data set of size N, prove that
?
?
?
?
?
?
?
?
? ?
n
i
i
i
N
E
O
1
2
2
? .
The expected and observed weekly sales data for a newly launched snack food
in a metropolitan city at five locations (L1, L2,L3,L4 and L5) is given below:
City L1 L 2 L 3 L 4 L 5
Expected sales in units/week 165 175 118 185 85
Observed sales in units/week 152 184 100 170 78
(i) What is the actual mean daily sale of the product?
(ii) Are observed and expected sales in significant agreement with each other?
Comment logically at 5% significance level.
07
2
[Take % 5 , 4 . . 49 . 9
2
? ? ? ? ? f d for ]
OR
(c) Define Hedonic Evaluation. Three test samples S1, S2, & S3 of a soft drink were
compared with a market control sample (C) of the same type to ascertain the
relative overall acceptability. A standard 9-point hedonic scale was employed
and 12 untrained panelists were engaged. The obtained data is given below:
Panelists Test Sample
S 1
Test Sample
S 2
Test Sample
S 3
Control
Sample C
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
1
2
2
2
2
3
1
4
2
6
7
4
7
7
5
5
3
5
8
8
6
4
4
5
5
4
8
6
5
5
6
6
5
4
3
2
3
2
3
3
2
2
3
1
4
1. Determine Fiducial Limits for the control sample at ? = 5% & 1%
2. Which test sample is superior to control at 5% and 1% significance level?
3. Which test sample(s) is/are inferior to control at 1% significance level?
t (df = 11 & ? = 5%) 2.20
t (df = 11 & ? = 1%) 3.11
Give reasons for your answers.
07
Q.3 (a) The standard plate count in a canned fruit pulp is to be limited to 15 after 9-
months under normal storage conditions at NTP. After 9-months, 10 samples
were randomly picked up from a large population and their SPC was estimated
in lab. The mean SPC of the 10 samples was calculated as 16 and variance was
1.2544. Name and perform a suitable statistical test to demonstrate if the
estimated SPC is in agreement with the specified limit. Comment on ? = 5% and
1%.
t-value at d.f.= 9
? = 5% ? = 1%
2.26 3.25
03
(b) How will you characterize normal distribution? State its application in quality
control? Examine the following probability distribution function:
50
) 3 (
2
) (
x
e x g
?
? ? , - ?
standard deviation, variance and value of ?.
04
(c) State the conditions of good estimators of a point estimate? Explain the criteria
for efficiency and sufficiency of point estimate of a population parameter? A
random sample of 650 bottles of strawberry squash was drawn from a large
consignment meant for export. Out of these 170 were found infected beyond the
specified limits. Determine 95% & 99 % confidence limits for the proportion of
infected cans in the consignment.
Level of significance (?) Critical value of statistic
1% 2.58
5% 1.96
07
OR
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2171401 Date:10/05/2019
Subject Name:Food Standards and Quality Assurance
Time:02:30 PM TO 05:00 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) Answer the following briefly:
i. Define gustation
ii. Calculate the degrees of freedom Poisson?s distribution.
iii. Define ? and ? risk
03
(b) Match the entities of Column-I with most appropriate entities of Column-II.
S.No. Column-I Column-II
1. Simple hypothesis is Prof. R.A Fisher
2. Addition law of probability Consistent
3. Olafaction Product difference
4. Theory of Estimation Smell
5. Triangle test Reject hypothesis
6. Sufficient estimator is H: {? = 6 & ?
2
= 16}
7. Critical region Mutually exclusive events
8. Normal distribution d.f. = 2
04
(c) What are seven principles of HACCP? Discuss each one with its importance. 07
Q.2 (a) Define Null Hypothesis. Explain the possible errors during testing of a statistical
hypothesis. Explain which type of error is considered as more risky in quality
control and why?
03
(b) What is critical region? Let ?(h) be the probability distribution function of
accepting the Null hypothesis Ho
when it is true;
Show that ?(h) = 1- ?(h) ;
where, ?(h) = P (x ? S- ? ?h) or P(S- ? ?h) and h ? H and ? is the region of
sample space S where Ho is rejected. Which function [? (h) or ? (h)] would you
maximize? Why and how?
04
(c) If Oi and Ei be the set of observed and expected frequencies (i = 1, 2, 3, 4??n)
for a data set of size N, prove that
?
?
?
?
?
?
?
?
? ?
n
i
i
i
N
E
O
1
2
2
? .
The expected and observed weekly sales data for a newly launched snack food
in a metropolitan city at five locations (L1, L2,L3,L4 and L5) is given below:
City L1 L 2 L 3 L 4 L 5
Expected sales in units/week 165 175 118 185 85
Observed sales in units/week 152 184 100 170 78
(i) What is the actual mean daily sale of the product?
(ii) Are observed and expected sales in significant agreement with each other?
Comment logically at 5% significance level.
07
2
[Take % 5 , 4 . . 49 . 9
2
? ? ? ? ? f d for ]
OR
(c) Define Hedonic Evaluation. Three test samples S1, S2, & S3 of a soft drink were
compared with a market control sample (C) of the same type to ascertain the
relative overall acceptability. A standard 9-point hedonic scale was employed
and 12 untrained panelists were engaged. The obtained data is given below:
Panelists Test Sample
S 1
Test Sample
S 2
Test Sample
S 3
Control
Sample C
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
1
2
2
2
2
3
1
4
2
6
7
4
7
7
5
5
3
5
8
8
6
4
4
5
5
4
8
6
5
5
6
6
5
4
3
2
3
2
3
3
2
2
3
1
4
1. Determine Fiducial Limits for the control sample at ? = 5% & 1%
2. Which test sample is superior to control at 5% and 1% significance level?
3. Which test sample(s) is/are inferior to control at 1% significance level?
t (df = 11 & ? = 5%) 2.20
t (df = 11 & ? = 1%) 3.11
Give reasons for your answers.
07
Q.3 (a) The standard plate count in a canned fruit pulp is to be limited to 15 after 9-
months under normal storage conditions at NTP. After 9-months, 10 samples
were randomly picked up from a large population and their SPC was estimated
in lab. The mean SPC of the 10 samples was calculated as 16 and variance was
1.2544. Name and perform a suitable statistical test to demonstrate if the
estimated SPC is in agreement with the specified limit. Comment on ? = 5% and
1%.
t-value at d.f.= 9
? = 5% ? = 1%
2.26 3.25
03
(b) How will you characterize normal distribution? State its application in quality
control? Examine the following probability distribution function:
50
) 3 (
2
) (
x
e x g
?
? ? , - ?
standard deviation, variance and value of ?.
04
(c) State the conditions of good estimators of a point estimate? Explain the criteria
for efficiency and sufficiency of point estimate of a population parameter? A
random sample of 650 bottles of strawberry squash was drawn from a large
consignment meant for export. Out of these 170 were found infected beyond the
specified limits. Determine 95% & 99 % confidence limits for the proportion of
infected cans in the consignment.
Level of significance (?) Critical value of statistic
1% 2.58
5% 1.96
07
OR
3
Q.3 (a) Define Normal distribution?
Plot the distribution f(x) =
? ?
18
10
2
18
1
?
?
x
e
?
for - ? < x < ? and demonstrate
that it represents probability distribution function of a Normal distribution.
Calculate its mean and variance.
03
(b) State the limiting conditions in applying ?Student t-test?. The sales data of a RTD
beverage from five different points of sale before and after a promotional
campaign are given below:
Examine if the promotional campaign be termed as effective at ? = 1%
[ t = 1.86 at d.f.= 4 and ? = 1%]
Points of Sale I II III IV V
Sales before 106 56 62 96 100
Sales after 116 58 60 110 112
04
(c) Explain the following briefly:
(i) Regression analysis
(ii) Unbiased estimator
(iii) Dilution test
(iv) Composite scoring test
(v) UMVUE
(vi) Law of conditional probability
(vii) ANOVA technique
07
Q.4 (a) Differentiate between Yesteryear?s and Today?s Quality Era. 03
(b) Briefly explain strategic grid and SWOT Analysis. 04
(c) Define Quality control and Quality Assurance. Discuss the interface of Quality
control department with other departments in a food industry.
07
OR
Q.4 (a)
Define the following terms:
i) Benchmarking
ii) Rubber Bondage
iii) Surveillance Audit
03
(b)
How value addition can change customer?s satisfaction level?
04
(c)
Explain Transition TQM Model with its diagrammatic representation.
07
Q.5 (a)
What do you understand by Good Manufacturing Practices?
03
(b)
Highlight on the followings.
i) American Public Health Association (APHA)
ii) Bureau of Indian Standards (BIS)
04
(c)
Enlist clauses of ISO 9001:2015 standard. What are benefits of Quality Management
System?
07
OR
Q.5 (a)
Introduce briefly FSSAI and its mandate.
03
(b)
What is a six sigma accuracy? How the process can be characterized with Cp and Cpk
value?
04
(c)
Discuss the drivers for quality initiatives in today?s scenario.
07
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This post was last modified on 20 February 2020