Statistical Quality Control
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In acceptance sampling, when there is a finite probability that the lot may be accepted even if the quality is not really good, is called as __________.
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Consumer’s risk
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Operator’s risk
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Owner’s risk
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Producer’s risk
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Explore key concepts of Statistical Quality Control through this engaging quiz. It covers topics like acceptance sampling, consumer's and producer's risks, and sampling plans. Ideal for learners interested in enhancing their understanding of quality assurance processes in industrial settings.
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- 2.
In acceptance sampling, when there is a finite probability that the lot may be rejected even if the quality is actually good, is called as __________.
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Consumer’s risk
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Operator’s risk
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Producer’s risk
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Operator’s risk
Correct Answer
A. Producer’s riskExplanation
Producer's risk refers to the risk that a producer or supplier of goods or services faces when a lot is rejected even though the quality is actually good. It is also known as Type I error or alpha risk. This means that the producer may incur costs or penalties due to the rejection of a lot, even if the quality of the products is acceptable.Rate this question:
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- 3.
In double sampling plan, if the numbers of defects is in between the two cut off numbers C1 and C2 then ______________.
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Accept the lot
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Take another sample
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none of these
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Reject the lot d)
Correct Answer
A. Take another sampleExplanation
If the number of defects in a double sampling plan falls between the two cut off numbers C1 and C2, it means that the initial sample did not provide a clear indication of the quality of the lot. In this case, taking another sample would be necessary in order to obtain a more accurate assessment of the lot's quality.Rate this question:
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- 4.
In double sampling plan ____________.
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Maximum one sample is taken
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Maximum two sample is taken
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Maximum three sample is taken
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None of these
Correct Answer
A. Maximum two sample is takenExplanation
In a double sampling plan, the maximum number of samples taken is two. This means that during the inspection process, the inspector will take a first sample and evaluate it. If the first sample fails to meet the required criteria, a second sample will be taken to make a final decision on the acceptance or rejection of the entire lot. This approach allows for a more efficient and cost-effective inspection process while still ensuring the quality of the products.Rate this question:
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- 5.
Which of the following is not a sampling plan?
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Single sampling plan
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Triple sampling plan
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Double sampling plan
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Sequential sampling plan
Correct Answer
A. Triple sampling planExplanation
A triple sampling plan is not a sampling plan because it is not a recognized or commonly used method of sampling. Single, double, and sequential sampling plans are all well-established and widely used techniques in sampling. However, triple sampling plan is not commonly used or recognized, making it the correct answer.Rate this question:
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- 6.
Which of the following statements are true regarding single sampling plans?
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The lot under test will be rejected if the total defective items in the sample exceed an acceptance number “C”
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All items of a random sample of size”n” must be defined and tested.
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A rejected sample results in 100% sampling or return of the lot to the producer
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All the above
Correct Answer
A. All the aboveExplanation
All the statements provided are true regarding single sampling plans. In single sampling plans, the lot under test will be rejected if the total defective items in the sample exceed an acceptance number "C". Additionally, all items of a random sample of size "n" must be defined and tested. If a sample is rejected, it results in either 100% sampling or the return of the lot to the producer. Therefore, all the statements mentioned are correct.Rate this question:
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- 7.
The maximum value of the average outgoing quality over all possible values of the proportion defective is called _____________.
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Lot tolerance proportion defective (LTPD)
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Average outgoing quality limit (AOQL)
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Average outgoing quality (AOQ)
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Acceptable quality level (AQL)
Correct Answer
A. Average outgoing quality limit (AOQL)Explanation
The average outgoing quality limit (AOQL) refers to the maximum value of the average outgoing quality across all possible values of the proportion defective. This means that it represents the highest average quality level that can be expected for a given proportion of defective items. AOQL is used as a benchmark to ensure that the outgoing quality of a product or process does not exceed a certain acceptable limit.Rate this question:
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- 8.
The producer’s risk means the probability that the consumer will ______.
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Accept a good lot c) accept a bad lot
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Accept a bad lot
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reject a bad lot
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Reject a good lot
Correct Answer
A. Reject a good lotExplanation
The producer's risk refers to the probability that the consumer will reject a good lot. This means that there is a chance that the consumer may not accept a lot of products that are actually of good quality.Rate this question:
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- 9.
The consumer’s risk means the probability that the consumer will ______.
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Accept a good lot
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Accept a bad lot
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Reject a bad lot
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Reject a good lot
Correct Answer
A. Accept a bad lotExplanation
The consumer's risk refers to the likelihood that the consumer will accept a bad lot. This means that there is a chance that the consumer will receive and agree to purchase a batch of products that do not meet their expectations or standards. This could result in the consumer being dissatisfied with the quality or performance of the goods they receive.Rate this question:
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- 10.
A decision rule to accept or reject a lot based on the results of one random sample is called a __.
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Single sampling plan
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Sequential sampling plan
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Random sampling plan
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Double sampling plan d)
Correct Answer
A. Single sampling planExplanation
A single sampling plan is a decision rule that determines whether to accept or reject a lot based on the results of one random sample. This means that only one sample is taken from the lot, and based on its results, a decision is made. This is in contrast to sequential sampling plans, where multiple samples are taken and decisions are made based on the cumulative results. Random sampling plan refers to the method of selecting the sample, while double sampling plan involves taking two samples and making a decision based on their combined results.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
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Apr 05, 2020Quiz Created by
Prakashchougule3
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