Motilal Nehru National Institute of Technology QUALITY ENGINEERING University model question papers



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Posted Date: 19 Jan 2010      Posted By:: kamal    Member Level: Bronze  Points: 5 (₹ 1)

2009 Motilal Nehru National Institute of Technology B.Tech. Industrial and Production Engineering QUALITY ENGINEERING University Question paper



Course: B.Tech. Industrial and Production Engineering   University/board: Motilal Nehru National Institute of Technology





NAME OF THE SUBJECT: QUALITY ENGINEERING

Q1) Answer the following [marks 4*6]

a)Draw an OC curve for n=100 and c=3 ?[marks 6]

b)Draw the corresponding AOQ curve.Identify the AOQL.[marks 6]

c)Also briefly describe the procedure of drawing the OC and AOQL curves[marks 6]

d)For the previous problem,if you chnage n=200 and c=6 how the shape of the curve will chnage? comment?[marks 6]




Q2) a) Define reliability [marks 5]

b)what will be the reliability of the system shown below the when the reliability of components are given as ra=0.8 , rb=0.8 , rc= 0.8 and rd=0.6[marks 5]

c)if you keep all the components in series what will be the equivalent reliability?[marks 3]



Q3) Answer all questions;

a)Explain why the cost of the manufacturing varies with tolerance[marks 5]

b)Explain how the optimal quality is decided in any system for quality of design [marks 5]

c)Explain quality of conformance.What is optimal quality of conformance?Explain in brief with the help of suitable diagram[marks 5]

d)Draw a bath tub curve used in the context of reliability,with labeling[marks 5]


Q4)answer all

a)Ten samples of parts were taken from a production line for 100% inspection,each sample containing 300 parts.The total number of defectives was 350.Compute the upper and lower control limits.What type of chart you may draw[marks 4]


b)Ten castings were inspected in order to locate defects in them.After inspection total 37 defects were found.compute appropriate limits[marks 4]


Q5)answer any four

a)Double sampling plan[marks 5]

b)OC curve for variable[marks 5]

c)Use of P chart[marks 5]

d)Costs of quality[marks 5]

e)Producers risk and Consumers risk[marks 5]





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