The average value of the quality characteristic corresponding to in-control state is represented by _____ in the control charts.

a) CL

b) UCL

c) LCL

d) Sample number

2. The highest value that a quality characteristic can take before the process becomes out-of-control, is called ______

a) Center line

b) Upper control limit

c) Lower control limit

d) Control limit

3. The horizontal line in the control chart which shows the minimum value of a quality characteristic, before the process gets out-of-control, is called the _____

a) Upper control limit line

b) Lower control limit line

c) Desired value

d) Center line

4. In the horizontal axis of a control chart displays _______

a) Sample number

b) Time

c) Either sample number or time

d) Neither sample number or time

5. If for a process, 18 out of 20 points are plotted above the CL but below the upper control limit, and only 2 of 20 are plotted between the center line and the lower control limit, what can we say about the process state?

a) In-control

b) Out-of-control

c) Data is not enough to predict

d) Process state is not dependent over this data

6. Shifting of mean from the current value to a new value and remaining there, is called _____ shift of the mean.

a) Continuous

b) Abrupt

c) Random

d) Sustained

7. A process is said to be in the statistical control if it operates with ______ of variation.

a) Chance causes

b) Assignable causes

c) Both chance and assignable causes

d) Neither chance nor assignable causes

8. Which of these is not a part of SPC's 7 tools?

a) Pareto chart

b) Histogram

c) Design of Experiments

d) Check sheet

9. If a process has its operation with _________ causes of variation, it is said to be an out-of-control process.

a) Chance

b) Assignable

c) Neither chance nor assignable

d) Out-of-control