CRE Quality Control Procedures 3

Question 1

In a double sampling plan, when is a second sample required?

Accepted Answer

When the first sample result falls between the acceptance and rejection numbers

Answer

When the lot size exceeds 10,000 units

Answer

When the AQL is set below 1.0%

Answer

When the first sample contains zero defects

Question 2

Which statistical measure best describes process spread in a capability study?

Accepted Answer

Standard deviation (sigma)

Answer

Median

Answer

Mode

Answer

Range of the sample mean

Question 3

What is Average Outgoing Quality Limit (AOQL) in acceptance sampling?

Accepted Answer

The maximum average defective rate in accepted lots after inspection and replacement

Answer

The maximum acceptable incoming defect rate before rejection

Answer

The lowest achievable AQL for a given sample size

Answer

The average defect rate of rejected lots returned to the supplier

Question 4

A u-chart is used to monitor:

Accepted Answer

The number of defects per unit when sample size varies

Answer

The proportion defective in equal-size samples

Answer

The number of defective units in a fixed sample

Answer

The individual measurements from a continuous process

Question 5

Which approach to quality improvement focuses on reducing variation to achieve near-zero defects at 3.4 DPMO?

Accepted Answer

Six Sigma

Answer

ISO 9001

Answer

Total Quality Management

Answer

Zero Defects program

Question 6

In a Shainin DOE approach, what is the 'Red X' concept?

Accepted Answer

The dominant root cause variable responsible for most of the variation

Answer

The critical characteristic on an engineering drawing

Answer

The highest-risk failure mode in an FMEA

Answer

The first control chart limit exceeded

Question 7

What distinguishes a nonconformance from a defect in quality control terminology?

Accepted Answer

A nonconformance is any failure to meet a specified requirement; a defect additionally implies fitness-for-use failure or safety concern

Answer

A defect is a minor issue while a nonconformance is a major issue

Answer

Nonconformances apply only to documents while defects apply to products

Answer

They are interchangeable terms with no practical distinction