QUESTION 22
The following measurements for a sample with dimension X are representative of a process known to be in statistical control
42, 52, 64, 45, 53, 56, 70, 57, 49, 62
Which of the following values BEST approximates the upper and lower control limits of the process capability.

QUESTION 23
Of the problem solving categories below, what is the usual sequence?
1. Select a problem needing improvement.
2. Collect data.
3. Implement the solution.
4. Determine if project is appropriate.
5. Study current procedures.
6. Determine candidates for data collection.
7. Analyze data.
8. Solve the problem.

QUESTION 24
Periodically, a sample of 20 items are randomly selected from a population that is normally distributed, the average is computed, and plotted. Which of the following statements is correct?
. The average of the logarithms of the values is lognormally distributed.
. The standard deviation of the averages is equal to the standard deviation of the individuals divided by the square root of 20.
. The variance of the averages is equal to the variance of the individuals divided by the square root of 20.

QUESTION 25
When using a control chart, a point plotting within the limits on the chart is

QUESTION 26
Which of the following distributions have the set of all real numbers as their domain?

QUESTION 27
The Shewhart or Deming cycle is often referred to as

QUESTION 28
The design function which assigns probability of failures between components or subsystems is called

QUESTION 29
A graph of a data set, composed of a series of rectangles, each proportional in width to the range of values in a class and proportional in height to the number of items or fraction of items falling in these classes, is called which of the following?

QUESTION 30
Which of the following are the MOST logical reasons for providing source inspection?
I. The supplier has consistently shown poor out-going quality.
II. The key inspection points are hidden after assembly at the suppliers’ plant.
III. The supplier requests the inspection to save them potential shipping expenses.
IV. The criticality of the product warrants it.

QUESTION 31
When trying to find all possible causes of a problem, which of the following tools would be useful?
I. Systematic troubleshooting and brainstorming.
II. Fishbone diagrams and histograms.
III. Checklists and scatter diagrams.
IV. Control charts and graphs.

QUESTION 32
When requesting “worst case” design analysis, you expect the reliability group to

QUESTION 33
The maximum allowable percent defective for the process average is the

QUESTION 34
Inspection operations typically

QUESTION 35
The maximum allowable percent defective for the process average is the

QUESTION 36
You have been asked to sample a lot of 500 units from vendor whose past quality has been about 2% defective. A sample of 40 pieces is drawn from the lot and you have been told to reject the lot if you find two or more parts defective. What is the probability of finding two or more parts defective?

QUESTION 37
What is the probability of an item failing in less than 5 hours if it has a constant failure rate of 1/hour?

QUESTION 38
Corrective action requests are primarily

QUESTION 39
A box contains 27 black and 3 red balls. A random sample of 5 balls is drawn without replacement. What is the probability that the sample contains one red ball?

QUESTION 40
A purchase order for subassemblies classified as critical must include a review by
I. Quality engineering.
II. The procurement department.
III. Design engineering.

QUESTION 41
Applications for surface plate includes which of the following?
I. Referencing plane for length measurements.
II. Referencing plane for parallelism measurements.
III. Establishing a datum plane for dimensional layout.
IV. Waiting place for delicate parts.
V. Keeping extra gages when not in use.

QUESTION 42
A lot is known to be 1.2% defective. Five units are randomly selected from the lot, and the lot is accepted if 1 or fewer defects are found. What is the probability of the lot being rejected?

QUESTION 43
Failure mode, effect, and criticality analysis, (FMECA) is primarily for the purpose of

QUESTION 44
An experiment with two factors, in which all levels of one variable are run at each level of the second variable, is called a

QUESTION 45
The first and most important step, in establishing a good corporate quality plan is