ANU B.Sc 5th Sem Quality and Reliability Important Questions are now available. Acharya Nagarjuna University B.Sc statistics 6th paper important questions and previous year paper questions. Get all ANU UPDATES on facebook at www.facebook.com/anuupdates

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UNIT-I (Importance of SQC in Industry)

**10 Marks questions**

- What do you understand by SQC? Explain its importance in industry.[ANU-17]
- Discuss the importance of SQC in industry and also define process control and product control.[ANU-18,19]
- Explain the statistical basis of control charts and discuss their interpretation.
- Explain in brief shewart control charts.
- Distinguish between natural tolerance limits and specification limits.[ANU-17]
- Explain the natural tolerance limits and specification limits.
- Discuss basic principles underlying control charts. What is process capability? Explain.[ANU-18,19]
- what do you understand by SQC? Discuss briefly its need and its utility in industry.

**5 Marks Questions**

- Discuss the causes of variation in quality. What are the uses of control charts.[ANU-17]
- What are specification limits? Give their interpretation.
- Explain the statistical quality control.
- Explain the specification limits.
- Explain the statistical basis of control charts.[ANU-17]
- Explain 3Ïƒ control limits.
- Explain the process control and product control.
- what the advantages of Shewart's control charts?
- Explain the concept of six sigma.
- Explain the importance of normal distribution in SQC.
- How SQC play in manufacturing the quality of product? [ANU-19]
- Explain natural tolerance limits.[ANU-19]
- Explain the construction and uses of np-chart.

UNIT-II ( Variable control chart)

**10 Marks questions **

- Explain the construction of R-Chart and Ïƒ-Charts?
- Explain the control chart for the number of defects.
- Explain the construction of P-Chart and C-Chart and discuss their interpretation.[ANU-19]
- Explain the construction of mean and standard deviation chart and discuss their interpretation.
- Explain how to construct control charts of variables.[ANU-19]
- Explain the construction of number of defective and fraction of defectives control charts.
- The following data shows the number of defectives in 20 lost. Each lot containing 2000 units. Draw a control chart for the number of defectives and examine the nature if the production process: 250,230,350,406,397,268,350,447,430,300,353,296,150,190,220,130,320,250.
- Explain the mean and range chart.
- What are the charts for attributes? Explain the p, np charts.
- Explain the construction of X(Bar) and R-Charts.[ANU-18,17]
- What are control chart? How do you construct p and np charts.[ANU-18,17]

**5 Marks Questions**

- What are the limitations of the control charts?
- Distinguish between variable and attribute charts.
- Explain NP-Chart.[ANU-19]
- Write applications of C-Chart.
- Define control chart. Explain the components and of control charts for attributes.
- Explain the S.D chart.

UNIT-III ( Acceptance sampling plans)

**10 Marks Questions**

- Explain the scope of acceptance sampling plans.[ANU-17,18,19]
- Explain (i) consumer's risk (ii) producer's risk (iii) AQL and (iv) LTPD [ANU-17,18]
- Explain the situation where 100% inspection is needed. Explain the need for sampling inspection plan.
- Explain the concept of A.Q.I and L.T.P.D
- Explain producer's risk and consumer's risk in acceptance sampling.
- Explain the advantages and disadvantages of sampling inspection.
- Explain acceptance sampling plan. What are the advantages of acceptance sampling plan. what is meant of process and product control.
- Explain the concept of acceptance sampling plans and write its applications.

**5 Marks Questions**

- What do you understand by acceptance sampling procedure? what are its uses? [ANU-19]
- Explain consumer risk.
- What do you understand by acceptance sampling plans? what are its uses?[ANU-17]
- Define the term Acceptance Quality Level(AQL).
- What is meant by product control.
- Define the characteristics of a good sampling plan.

UNIT-IV (Sampling Plans)

**10 Marks Questions**

- Explain single sampling plan. Obtain its OC and ASN functions.[ANU-18,17]
- Explain double sampling plan. Obtain its OC and ASN functions.[ANU-17]
- Explain double sampling plan. Obtain its OC, ASN and ATI functions for double sampling plan for attributes.
- Define single and double sampling plans and distinguish between single and double sampling.[ANU-18]
- Using binomial distribution. Explain single and double sampling for attributes and merits and demerits of single and double sampling plan.[ANU-19,18]
- Define a single sampling plan. Explain its construction and interpretation.
- Define a single sampling plan and explain their construction by using hyper geometric distribution .
- Define a double sampling plan and draw a flow diagram to construct it.

**5 Marks Questions**

- Explain A.S.N? why is it calculated?
- Explain OC curves.
- write a nite on double sampling plans.
- Discuss the merits and demerits of single and double sampling plans.[ANU-17]

UNIT-V (reliability)

**10 Marks Questions**

- Explain (i) failure notes (ii) hazard function and (iii) reliability. Sate and prove memory less property of exponential distribution.[ANU-17]
- Obtain the reliability estimate of exponential distribution.
- Find the reliability function in case of (i) series-parallel (ii) parallel-series system.
- Explain exponential distribution as life model and give its memory less property.
- Obtain reliability in terms of hazard rate and failure density.[ANU17]
- State and prove memoeryless property of exponential distribution. Obtain the estimate the reliability in the case of exponential failure model.[ANU-17]
- Explain the different modes of failure with help of both tub curve.[ANU-19]
- Describe exponential distribution as life model.
- Define Reliability. Explain the importance of hazard function in a computation of failure rate.
- Explain the lack of memory property of exponential in the light of reliability theory.[ANU-18
- Define Hazard. Explain the lack of memory property of exponential distribution.[ANU-19]
- Obtain the reliability estimate of exponential distribution. Also explain reliability function of give given estimation.[ANU-18]

**5 Marks Questions**

- Explain the importance of life test in reliability theory.[ANU-18]
- Explain k-out of n system and also find its reliability function.
- Explain the meaning and concept of reliability.
- Explain the importance of exponential distribution in reliability theory.[ANU-17]
- Explain Failure Notes.[ANU-19]