EXAM 3 OPSM 3830 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

EXAM 3 OPSM 3830 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS

Question:
1. When the results of quality control are unacceptable, what is the next step?
Answer:
corrective action

Question:
2. Statistical process control is ______.
Answer:
quality control efforts that occur during production

Question:
3. What is the best synonym for inspection from the below list?
Answer:
Appraisal

Question:
4. Inspection during transformation is called what?
Answer:
process control

Question:
5. What are the basic issues of quality control inspection? (Check all that apply.)
Answer:
How much and how often to inspect At what stage of the process inspection should occur Where
inspection should take place Whether to inspect attributes or variables

Question:
6. Select the best definition of Quality Control.
Answer:
A process that measures output relative to a standard and takes action when discrepancies occur.

Question:
7. Which product characteristics would prompt the most intensive inspection?
Answer:
Low-volume, high-cost

Question:
8. Which is/are examples of Acceptance Sampling? (Select all that apply.)
Answer:
Inspection of raw material batches before production Inspection of final assembly lots after production

,Question:
9. What are some examples of inspection points in the service sector? (Select all applicable answers.)
Answer:
Outgoing patient billing accuracy at medical clinic. Kitchen cleanliness at fast food restaurant at shift start.

Question:
10. Which of the following statements is/are correct about Inspection?
Answer:
Inspection involves checking for conformance against a quality standard. Inspection can occur before,
during or after production.

Question:
11. Which type of inspection occurs before and after production?
Answer:
acceptance sampling

Question:
12. One basic issue of inspection is what type of data to collect. If we can measure the value of a
characteristic, we are collecting ______ data.
Answer:
variable

Question:
13. Which of the following statements about inspection frequency are is/are correct?
Answer:
The more lots being produced the more inspections are needed. A stable process will require less frequent
checks than an unstable process.

Question:
14. What are the different inspection points in manufacturing? (Select all correct answers.)
Answer:
Raw materials & purchased parts before production Before a costly, irreversible or covering
operation/process. Finished goods after production

Question:
15. Under which conditions would on-site inspection be better than off-site at a specialized test lab?
Answer:
Need for quick inspection results due to delivery schedule Alteration or contamination of samples during
transfer to lab

Question:
16. True or false: In acceptance sampling, a type of quality control inspection, 100% of product in a given
lot are checked for conformance.
Answer:
false

,Question:
17. What is the rationale and basis for statistical process control?
Answer:
Acceptable variation within probability limits

Question:
18. Given a stable process, we must ask the question whether the ______ of process output is within an
acceptable range.
Answer:
inherent variability

Question:
19. Select the best definition of assignable variation.
Answer:
Special, non-random variation traceable to a definite cause.

Question:
20. Which scenario would indicate the need for off-site testing at a centralized testing facility?
Answer:
Customer specifications for satellite component require dust-free, no vibration test

Question:
21. What is the best definition of statistical process control?
Answer:
Analyze data from some point in the process to determine if the process is likely to be in or out of control.

Question:
22. When comparing a sampling to a process distribution, what are the most important things to note?
Answer:
They have the same means, are normally distributed, and sampling has less variability.

Question:
23. Random variation in a process indicates __________; whereas non-random variation indicates process
__________.
Answer:
stability/instability

Question:
24. What does the central limit theorem tell us about the sampling distribution?
Answer:
It approaches a normal distribution as sample size increases.

Question:
25. Select the best definition of random variation.
Answer:
Common variation inherent in a process occurring by chance.

, Question:
26. What is the first step in the control process?
Answer:
Define in sufficient detail what is to be controlled.

Question:
27. Select the best definition of a control chart.
Answer:
A time-ordered plot of sample statistics used to determine randomness or non-randomness.

Question:
28. Which of the following statements is/are correct about the sampling distribution? (Select all applicable
answers)
Answer:
Sampling distribution is a plot of many sample means. Sampling distribution is narrower than the process
distribution.

Question:
29. When +/- 2 standard deviation control limits are used in a process control chart, which of the below
statements are true?
Answer:
Approximately 95.5% of the time random data points will fall within (inside) the upper and lower control
limits.

Question:
30. Comparing a theoretical sampling distribution to the process distribution, which of the following is
true?
Answer:
The sampling distribution curve is narrower than the process distribution.

Question:
31. Which of the following statements about Type I error is/are correct?
Answer:
A Type I error is concluding non-randomness and being mistaken. A Type I error's alpha risk equals the
probability (area) in the two "tails."

Question:
32. True or false: In the control process, only those characteristics that can be counted or measured are
candidates for control.
Answer:
true

Question:
33. What is the difference between variable and attribute data? (Select the best answer.)
Answer:
Variable data is measured on a continuous scale and attribute data is counted using discrete numbers.