Metrology and Quality Control : Question Paper Dec 2014 - Mechanical Engineering (Semester 5)

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Metrology and Quality Control - Dec 2014

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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