MSSC: Quality Intro to SPC

If a sampling plan required 5% of the parts to be inspected in 1000 parts? a. 5 b. 20 c. 50 d. 500

c. 50

If 200 parts are sampled from 3000 products, what is the sampling rate? a. 0.67 percent b. 67 percent c. 6.7 percent d. 0.067 percent

c. 6.7 percent

The Cpk is a statistical control process term that describes the ______. a. Standard outcome of a process b. Standard deviation of a process c. Capacity of a process d. Means of a process

c. Capacity of a process

A histogram is one type of tool that can be used to _______. a. Weigh material b. Network computers c. Measure process control d. Assure worker attendance

c. Measure process control

Production department develop a quality history database by __________. a. Working as a team to solve problems b. Stopping the line when the number of defects suddenly increase c. Recording inspection data d. Using concurrent engineering

c. Recording inspection data

Predicting the percentage of parts that will fall within a certain measurement if the data is distributed normally, is done by calculating the: a. Range b. Means c. Standard deviation d. Cell width

c. Standard deviation

Two types of variation are: a. regular cause and special case. b. common causes and regular caused. c. common cause and special cause. d. control cause an uncontrolled case.

c. common cause and special cause.

Workers perform _______ to control product quality, and develop SPC charts and determine its parts meet specification. a. Root cause analysis b. Predictive maintenance activity c. Team meetings d. Inspections

d. Inspections

Random part should be selected from a production run for inspection because ______. a. Selecting parts batches take too long for an operator to inspect b. The odds of finding one bad parts are increased c. To prevent the operator from only maintaining the machine when a sample is getting ready to be taken d. Its the best method to ensure the sample is representative of the characteristics of the production run

d. Its the best method to ensure the sample is representative of the characteristics of the production run

Once the Cpk of a process is determined, it can predict the ________ of a product as long as the process _______. a. Production; rate remains stable b. Life cycle; is within specification c. Quality; is not stopped d. Quality; remains in control

d. Quality; remains in control

Parts are inspected _______ to make sure the typical characteristics of a produced part are found. a. In small lots b. In large lots c. Only at one time each shift d. Randomly

d. Randomly

A bell shaped curve that results from a large group of measurements is the basic concept of _________. a. Central tendency b. Standard deviation c. Means d. Controlled variation

a. Central tendency

When construction a histogram, no value should ever fall on a ______. a. Baseline b. Boundary c. Axis d. Even number

b. Boundary

Statistical process control (SPC) is used to ________. a. Provide instruction for control equipment b. Determine when a process is going to produce bad parts before it actually does c. Provide high performance control of machines in process application d. Schedule preventative maintenance

b. Determine when a process is going to produce bad parts before it actually does

A _______ is a graphic method to show how the data is distributed across the range of values. a. Pareto diagram b. Histogram c. Scatter diagram d. Flow chart

b. Histogram

If the histogram of a process is not bell shaped, then the process is _________. a. Not centered b. Not stable c. Normal d. None of the above

b. Not stable

To save money using SPC, a factory determines if there is a ______ in a process. a. Defect b. Special cause variation c. Error d. Common cause variation

b. Special cause variation

SPC stands for ________. a. Standard practices and competencies b. Statistical process control c. Staffing protocol and cost d. Standard parts cost

b. Statistical process control