Question 1
A good lot can be rejected through the use of acceptance sampling.
A. TRUE
B. FALSE
View Answer
Answer: Option A
Explanation:
As acceptance sampling considers only a particular number of sample units, and does not make use of the data of other units, there is a slight possibility that it will reject the good lot.
Question 2
Acceptance sampling is not used when _____________
A. The test is destructive
B. The cost of 100% inspection is quite high
C. The supplier’s process capability is very high
D. Although the supplier process is satisfactory but a program is needed for continuous monitoring
View Answer
Answer: Option C
Explanation:
The acceptance sampling is used when the test is destructive, or the cost of 100% inspection is quite high, or when we need a continuous monitoring program.
Question 3
Decision making regarding the lot disposition is sometimes called _____________
A. Lot rejection
B. Lot acceptation
C. Lot sentencing
D. Lot wording
View Answer
Answer: Option C
Explanation:
Based on the acceptance sampling information, there is decision making regarding the lot information. This decision is either to accept or reject the lot. So it is called, the Lot Sentencing.
Question 4
Designed experiments may benefit the lot quality improvement process more than the Acceptance sampling.
A. TRUE
B. FALSE
View Answer
Answer: Option A
Explanation:
As Acceptance sampling is just a lot sentencing process, it can’t estimate the quality of products in the lot. But designed experiments ensure good quality of the process output before even production.
Question 5
How many sampling plans are there in the case of acceptance sampling?
A. 1
B. 2
C. 3
D. 5
View Answer
Answer: Option C
Explanation:
There are only 3 sampling plans available in the case acceptance sampling, namely: single-sampling plan, double-sampling plan, and multiple-sampling plan.
Question 6
Lots in the case of acceptance-sampling plan may not be homogeneous.
A. TRUE
B. FALSE
View Answer
Answer: Option B
Explanation:
It is necessary to have the lots to be homogenous in the case of acceptance sampling. This is done by producing them on same machines by same operators, and keeping the other environmental factors to be the same.
Question 7
Sequential sampling is an extension of ____________
A. Single sampling plan
B. Double-sampling plan
C. Multiple-sampling plan
D. 0% sampling
View Answer
Answer: Option C
Explanation:
As the multiple-sampling plan is associated with the case when N numbers of samples are taken of n units, it has an intimate extension as Sequential sampling.
Question 8
The no-inspection alternative of sampling is used when ______________
A. The supplier’s process is so good that defective units are never encountered
B. The supplier’s process is so bad that almost every unit is defective
C. The component is extremely critical
D. The component is moderately critical
View Answer
Answer: Option A
Explanation:
When the supplier’s process is so good that the defective units are never encountered. This shows that the supplier process capability is quite high.
Question 9
The purpose of Acceptance sampling is to _____________
A. Sentence lots
B. Estimate lot quality
C. Estimate lot defectives
D. Estimate lot conformity
View Answer
Answer: Option A
Explanation:
The Acceptance sampling procedure is necessarily a lot sentencing procedure. It cannot be used to estimate the lot quality or lot conformity to the standard specifications.
Question 10
There are necessarily 2 samples of n units taken and checked in the case of double sampling plan.
A. TRUE
B. FALSE
View Answer
Answer: Option B
Explanation:
In the Double sampling plan, it is not necessary to take two samples. Sometimes we can accept or reject the lot based upon the information from the first lot.
Question 11
What is done in single sampling plan?
A. Only one unit is checked
B. Only the first lot is checked 100%
C. Only n samples of 1 unit are checked
D. Only one sample of n units is checked
View Answer
Answer: Option D
Explanation:
Single-sampling plan is a lot sentencing procedure in which one sample of n units is selected and checked, at random from the lot. Lot is sentenced based upon only this sample.
Question 12
When is the 100% inspection done?
A. The supplier’s process is so good that defective units are never encountered
B. The supplier’s process is so bad that almost every unit is defective
C. The component is extremely critical
D. The component is moderately critical
View Answer
Answer: Option C
Explanation:
The option of full inspection is chosen only when the product component is extremely critical, and can affect the whole product performance when used defective, e.g. aircraft nuts and bolts.
Question 13
When the inspection error rate is sufficiently high, which of these is used as the sampling technique?
A. 0% inspection
B. 100% inspection
C. 50% inspection
D. Acceptance sampling
View Answer
Answer: Option D
Explanation:
When there are many items to be inspected and the inspection error rate is sufficiently high, that 100% inspection might cause a high % of defective units to be passed, the procedure of acceptance sampling is adopted.
Question 14
Which generates lesser information about the products and the manufacturing process, 100% sampling or Acceptance sampling?
A. 100% sampling
B. Acceptance sampling
C. Both generate equal amount of information
D. Can’t be predicted
View Answer
Answer: Option B
Explanation:
As we there are lesser number of units as samples in the case of acceptance sampling rather than the 100% sampling procedure, it generates lesser information about the process and the product.
Question 15
Which has the lowest number of manpower required?
A. Acceptance sampling
B. 0% inspection
C. 100% inspection
D. 50% inspection
View Answer
Answer: Option B
Explanation:
As 0% inspection does not need any equipment or personnel to check the product component supplied by the supplier, it has the lowest number of manpower required.
Question 16
Which has the most probability of rejecting the good lot?
A. Acceptance sampling
B. 100% sampling
C. 0% sampling
D. Can’t be predicted
View Answer
Answer: Option A
Explanation:
As the 100% inspection accepts the lot after the inspection of whole lot, and there are rarely any defectives in the case of no-inspection, acceptance sampling is having the highest probability of rejecting the good lot.
Question 17
Which is most economical of these?
A. Single sampling plan
B. Double-sampling plan
C. Multiple-sampling plan
D. 100% sampling
View Answer
Answer: Option A
Explanation:
As single sampling plan necessarily requires only one sample of n units, we may say that it is the most economical of all the acceptance sampling plans.
Question 18
Which is the most expensive for the same testing process and product component to be tested?
A. Acceptance sampling
B. 100% sampling
C. 0% sampling
D. 50% sampling
View Answer
Answer: Option B
Explanation:
As the 100% sampling procedure requires the checking of whole lot, it requires more resources to be devoted towards the sampling process. This makes it the most expensive procedure of all.
Question 19
Which of these can be used as an audit tool to ensure the output of a process conforms to requirements?
A. Cusum charts
B. EWMA charts
C. Acceptance sampling
D. np-charts
View Answer
Answer: Option C
Explanation:
The most effective use of acceptance sampling is not to “inspect quality into the product”, but rather as an audit tool to ensure that the output is similar to the required specifications.
Question 20
Which of these does not require sampling documentation at all?
A. 0% sampling
B. 100% inspection
C. Acceptance inspection
D. 50% inspection
View Answer
Answer: Option A
Explanation:
As there is no sampling done in the case of 0% inspection or sampling, there is no need to do the documentation for the same. So it doesn’t require any sampling documentation at all.
Question 21
Which of these is not a correct statement for Acceptance Sampling?
A. Concerned with inspection of products
B. Concerned with decision making regarding products
C. One of the oldest aspects of quality assurance
D. One of the oldest aspects of quality control
View Answer
Answer: Option D
Explanation:
Acceptance sampling is a procedure used in quality assurance, which is concerned with inspection of manufactured products and the decision making regarding their state.
Question 22
Which of these is not an advantage of acceptance sampling over the 100% sampling plan?
A. Less expensive
B. Highly costly
C. Applicable to destructive testing
D. Lesser manpower is needed
View Answer
Answer: Option B
Explanation:
As lesser number of units are checked while using the acceptance sampling plan instead of the 100% sampling plan, it is less expensive, applicable to destructive testing, and needs lesser manpower.
Question 23
Which of these is not used for a lot quality inspection purposes?
A. EWMA Control chart
B. Cusum chart
C. Shewhart control charts
D. Acceptance Sampling
View Answer
Answer: Option D
Explanation:
The Acceptance sampling procedure is used for decision making of either acceptance or rejection of a lot. It can’t be used as a lot quality estimators.
Question 24
Which of these is not used in sampling?
A. 0% inspection
B. 100% inspection
C. Acceptance sampling
D. 5% inspection
View Answer
Answer: Option D
Explanation:
There are generally three techniques used in the inspection of a lot; first is 0% inspection, second is 100% inspection, and third is acceptance sampling.
Question 25
Which of these is used when the test of the component is non-destructive, cheap and fast?
A. 0% inspection
B. Acceptance sampling
C. 100% sampling
D. 50% sampling
View Answer
Answer: Option D
Explanation:
As it will give better results in the case of 100% inspection when the test procedure of a component is non-destructive, cheap, and fast, the full lot sampling procedure is adopted.
Question 26
Which of these procedures doesn’t provide a direct form of quality control?
A. Control charts
B. Acceptance sampling
C. Design of experiments
D. Cusum charts
View Answer
Answer: Option B
Explanation:
The Acceptance sampling procedure doesn’t provide a direct form of quality control. Acceptance sampling simply accepts and rejects lots; even if all lots are of same quality, some are accepted and some are not.
Question 27
Which of these requires planning and documentation of the sampling procedure?
A. Acceptance sampling
B. 100% sampling
C. 0% sampling
D. 50% sampling
View Answer
Answer: Option A
Explanation:
The 100% sampling checks the whole lot, so it does not require any planning or documentation, whereas the acceptance sampling requires it.
Question 28
Which technique was used majorly in 1930s and 1940s for incoming or receiving inspection?
A. SPC
B. Histogram
C. c-chart
D. Acceptance sampling
View Answer
Answer: Option D
Explanation:
Acceptance sampling was one of the major components of the field of statistical quality control, and was used primarily for incoming and receiving inspection, in the 1930s and 1940s.
Question 29
Why are larger lots preferred over smaller lots in the case of acceptance sampling?
A. Because it’s economical
B. Because it is costly
C. Because it is time consuming
D. Because it is complicated to sample larger lots
View Answer
Answer: Option A
Explanation:
The larger lots are preferred over smaller lots as it saves time, and it is very easy to sample larger lots. The larger lots are also mostly homogeneous.