Mechanical Engineering (Semester 5)
TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
Answer any one question from Q1 and Q2
1 (a) Define standards. Explain 'Line Standard' and 'End Standard' of measurement with two examples.(6 marks)
1 (b) Explain Laser Interferometer and its application.(4 marks)
Write short notes on (any 3);
10 (a) ISO 9000.(6 marks)
10 (b) Quality audit(6 marks)
10 (c) FMECA(6 marks)
10 (d) Six sigma(6 marks)
10 (e) 5S.(6 marks)
2 (a) Explain autocollimator with ray diagram and application.(6 marks)
2 (b) Explain Hole basis system and Shaft basis system.(4 marks)
Answer any one question from Q3 and Q4
3 (a) Explain the method of measuring effective diameter using three wires with neat sketch.(8 marks)
3 (b) Differentiate between Allowance and Tolerance.(2 marks)
4 (a) Explain:
1) Base tangent method of gear measurement.
2) Constant Chord method.(8 marks)
4 (b) Draw Go and NO Go plug gauge.(2 marks)
Answer any one question from Q5 and Q6
5 (a) Explain Deming's cycle and 14 points.(8 marks)
5 (b) What is cost of quality ? Explain its types.(8 marks)
6 (a) Explain old 7 quality tools.(8 marks)
6 (b) Explain Juran's trilogy approach.(8 marks)
Answer any one question from Q7 and Q8
7 (a) Explain with OC curve followings : Producer's Risk, Consumers Risk, AOQL and LTPD.(8 marks)
7 (b) The following data shows number of defectives in inspection of 10 lots of 100 sample size each for a connecting rods. Determine the control limits. And the revision made, in case the chart is 'out of limits'.
|
Lot No |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
|
Defectives |
4 |
5 |
6 |
7 |
11 |
1 |
5 |
9 |
5 |
4 |
(8 marks)
8 (a) Explain multiple sampling plan with flowchart.(8 marks)
8 (b) Define AOQL and AOQ. For the given data calculate sample size and AOQ for single sampling plan.
1) probability of acceptance for 0.3% defectives in a lot is 0.558.
2) lot size N=10000 units.
3) np = 1.5, c = 1.
4) Detectives found in the sample are not to be replaced.(8 marks)
Answer any one question from Q9 and Q10
9 (a) Explain Quality Function Development and its benefits.(6 marks)
9 (b) Explain JIT concept in industry.(6 marks)
9 (c) Explain KAIZEN and KANBAN system.(6 marks)
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