Question

1. When identical parts are being manufactured. They vary from one another. If the variation is normally distributed if:

a) is natural and is to be expected

b) indicates the parts do not meet quality standards

c) indicates an unstable process is developing

2. Probability tells us:

a) how often something actually occurs

b) how often something is expected to occur

c) the number of random samples it takes for an event to occur

3. Unnatural variation is normally the result of:

a) expected variation in the process

b) assignable causes

c) product design choices

4. A histogram is a graph of:

a) the past history of the process

b) machine capability

c) how often events or measurements occur

5. The normal distribution curve:

a) is a picture of how products are distributed from a stable set of conditions

b) provides accurate information about specification limits

c) allows us to identify causes of variation

6. The mean of a sample taken from a population:

a) is written as x

b) is the result of measuring all the individuals

c) determines process capability

7. Range is:

a) the number of times an event occurs

b) the difference between highest and lowest values

c) shown on an x chart

8. The variability of a group is described by:

a) standard deviation

b) population totals

c) the value between the first and last piece produced

9. A “quality” product is one that:

a) is within the specification limits

b) meets the needs and expectations of the customer

c. uses geometric dimensioning and tolerancing

10. Statistical Process Control:

a) tracks the variability of products or services

b) will solve he majority of quality related problems

c) is most useful during 100% inspection

11. The normal distribution of average is:

a) larger than the distribution of individuals

b) narrower than the distribution of individuals

c) the same as the distribution of individuals

12) A product’s key quality characteristics are monitored:

a) during final inspection

b) within +- 0.001

c) using control chart

13. Control limits on an x are:

a) the statistical words for blueprint tolerances

b) based upon the distribution of sample averages

c) used to determine process capability

14) Process capability studies:

a. given information about how a process is behaving

b) are most effective in determining whether or not SPC works

c) require that a single machine be capable of producing at least 2 different parts

15) Values plotted as points on an x chart are:

a) individual values

b) specification limits

c) sample values

16. The pattern of points on an x chart should show a normal distribution that:

a) closely parallels individual measurement

b) shows percent defective

c) is within +- 3 sigma

Answer 1