Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech IE (Industrial Engineering and Management) 2020 March 4th Sem Statistical Quality Control Previous Question Paper
Roll No. Total No. of Pages : 03
Total No. of Questions : 07
B.Tech. (Ind. Engg. & Mgt.) (Spl. in TQM) PT (Sem.?4)
STATISTICAL QUALITY CONTROL
Subject Code : IEM-403
M.Code : 61018
Time : 3 Hrs. Max. Marks : 40
INSTRUCTIONS TO CANDIDATES :
1. Attempt EIGHT out of TEN questions from SECTION-A carrying TWO marks
each.
2. Attempt any FOUR out of SIX questions from SECTION-B carrying SIX marks
each.
SECTION-A
1. Answer briefly :
a. Write importance of planning phase for quality control.
b. Discuss various objectives of inspection.
c. Write disadvantages of sampling.
d. What do you mean by sampling for variables?
e. What do you mean by acceptance control?
f. Write short note on operating characteristics curve.
g. What is Taguchi quadratic loss function? Discuss.
h. Write various stages in process capability studies.
i. Write objectives of statistical process control.
j. Discuss limitations of control charts.
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1 | M-61018 (S110)-2700
Roll No. Total No. of Pages : 03
Total No. of Questions : 07
B.Tech. (Ind. Engg. & Mgt.) (Spl. in TQM) PT (Sem.?4)
STATISTICAL QUALITY CONTROL
Subject Code : IEM-403
M.Code : 61018
Time : 3 Hrs. Max. Marks : 40
INSTRUCTIONS TO CANDIDATES :
1. Attempt EIGHT out of TEN questions from SECTION-A carrying TWO marks
each.
2. Attempt any FOUR out of SIX questions from SECTION-B carrying SIX marks
each.
SECTION-A
1. Answer briefly :
a. Write importance of planning phase for quality control.
b. Discuss various objectives of inspection.
c. Write disadvantages of sampling.
d. What do you mean by sampling for variables?
e. What do you mean by acceptance control?
f. Write short note on operating characteristics curve.
g. What is Taguchi quadratic loss function? Discuss.
h. Write various stages in process capability studies.
i. Write objectives of statistical process control.
j. Discuss limitations of control charts.
2 | M-61018 (S110)-2700
SECTION-B
2. The quality control inspector at Cocoa Fizz would like to develop a range (R) chart in order
to monitor volume dispersion in the bottling process. Use the data from Table 1 to develop
control limits for the sample range.
3. Compute the Cpk measure of process capability for the following machine and interpret the
findings. What value would you have obtained with the Cp measure?
Machine Data: USL = 80
LSL = 50
Process ? = 5
Process ? = 60
Sample
No.
Bottle volume in Ounces Average Range
1 2 3 4
X
R
1 15.85 16.02 15.83 15.93 15.91 .19
2 16.12 16.00 15.85 16.01 15.99 .27
3 16.00 15.91 15.94 15.83 15.92 .17
4 16.20 15.85 15.74 15.93 15.93 .46
5 15.74 15.86 16.21 16.10 15.98 .47
6 15.94 16.01 16.14 16.03 16.03 .20
7 15.75 16.21 16.01 15.86 15.86 .46
8 15.82 15.94 16.02 15.94 15.93 .20
9 16.04 15.98 15.83 15.98 15.86 .21
10 15.64 15.86 15.94 15.89 15.83 .30
11 16.11 16.00 16.01 15.82 15.99 .29
12 15.72 15.85 16.12 16.15 15.96 .43
13 15.85 15.76 15.74 15.98 15.83 .24
14 15.73 15.84 15.96 16.10 15.91 .37
15 16.20 16.01 16.10 15.89 16.05 .31
16 16.12 16.08 15.83 15.94 15.99 .29
17 16.01 15.93 15.81 15.68 15.86 .33
18 15.78 16.04 16.11 16.12 16.01 .34
19 15.84 15.92 16.05 16.12 15.98 .28
20 15.92 16.09 16.12 15.93 16.02 .20
21 16.11 16.02 16.00 15.88 16.00 .23
22 15.98 15.82 15.89 15.89 15.90 .16
23 16.05 15.73 15.73 15.93 15.86 .32
24 16.01 16.01 15.89 15.86 15.94 .15
25 16.08 15.78 15.92 15.98 15.94 .30
Total 398.75 7.17
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1 | M-61018 (S110)-2700
Roll No. Total No. of Pages : 03
Total No. of Questions : 07
B.Tech. (Ind. Engg. & Mgt.) (Spl. in TQM) PT (Sem.?4)
STATISTICAL QUALITY CONTROL
Subject Code : IEM-403
M.Code : 61018
Time : 3 Hrs. Max. Marks : 40
INSTRUCTIONS TO CANDIDATES :
1. Attempt EIGHT out of TEN questions from SECTION-A carrying TWO marks
each.
2. Attempt any FOUR out of SIX questions from SECTION-B carrying SIX marks
each.
SECTION-A
1. Answer briefly :
a. Write importance of planning phase for quality control.
b. Discuss various objectives of inspection.
c. Write disadvantages of sampling.
d. What do you mean by sampling for variables?
e. What do you mean by acceptance control?
f. Write short note on operating characteristics curve.
g. What is Taguchi quadratic loss function? Discuss.
h. Write various stages in process capability studies.
i. Write objectives of statistical process control.
j. Discuss limitations of control charts.
2 | M-61018 (S110)-2700
SECTION-B
2. The quality control inspector at Cocoa Fizz would like to develop a range (R) chart in order
to monitor volume dispersion in the bottling process. Use the data from Table 1 to develop
control limits for the sample range.
3. Compute the Cpk measure of process capability for the following machine and interpret the
findings. What value would you have obtained with the Cp measure?
Machine Data: USL = 80
LSL = 50
Process ? = 5
Process ? = 60
Sample
No.
Bottle volume in Ounces Average Range
1 2 3 4
X
R
1 15.85 16.02 15.83 15.93 15.91 .19
2 16.12 16.00 15.85 16.01 15.99 .27
3 16.00 15.91 15.94 15.83 15.92 .17
4 16.20 15.85 15.74 15.93 15.93 .46
5 15.74 15.86 16.21 16.10 15.98 .47
6 15.94 16.01 16.14 16.03 16.03 .20
7 15.75 16.21 16.01 15.86 15.86 .46
8 15.82 15.94 16.02 15.94 15.93 .20
9 16.04 15.98 15.83 15.98 15.86 .21
10 15.64 15.86 15.94 15.89 15.83 .30
11 16.11 16.00 16.01 15.82 15.99 .29
12 15.72 15.85 16.12 16.15 15.96 .43
13 15.85 15.76 15.74 15.98 15.83 .24
14 15.73 15.84 15.96 16.10 15.91 .37
15 16.20 16.01 16.10 15.89 16.05 .31
16 16.12 16.08 15.83 15.94 15.99 .29
17 16.01 15.93 15.81 15.68 15.86 .33
18 15.78 16.04 16.11 16.12 16.01 .34
19 15.84 15.92 16.05 16.12 15.98 .28
20 15.92 16.09 16.12 15.93 16.02 .20
21 16.11 16.02 16.00 15.88 16.00 .23
22 15.98 15.82 15.89 15.89 15.90 .16
23 16.05 15.73 15.73 15.93 15.86 .32
24 16.01 16.01 15.89 15.86 15.94 .15
25 16.08 15.78 15.92 15.98 15.94 .30
Total 398.75 7.17
3 | M-61018 (S110)-2700
4. Control charts of X and R. ? are to be maintained on drawings from a bowl of chips the
distribution of which is approximately normal. The subgroup size is 5, X is 60 and ? is 8.
Assume that 3 sigma control limits are to be based on X and ?. Compute the value of the
upper control limit the centre line and the lower control limit for the X , R and ? charts
respectively.
5. The lot size N is 2,000 in a certain AOQL inspection procedure. The desired AOQL of 2%
can be obtained with any one of the three sampling plans. These are :
a. n = 65, c = 2
b. n = 41. c = 1 and
c. n = 18, c = 0.
If a large number of lots 0.3% defective are submitted for acceptance, .what will be the
average number of units inspected per lot under each of these sampling plans?
6. Write short notes on the following :
a. Systematic sampling plan
b. Producer?s risk and consumer?s risk
7. a. State the objectives of X and R charts.
b. Compare X chart with R charts. Discuss the circumstances in which either of the two
or a combination of these will be used for the purpose of control.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 21 March 2020