CQE Inspection and Testing Methods 2

Question 1

What is 'destructive testing' and when is it typically used?

Accepted Answer

Testing that renders the tested specimen unusable, typically used to determine material properties or failure modes

Answer

Testing that damages the test equipment

Answer

Testing performed on scrapped parts only

Answer

Testing that exceeds regulatory safety limits

Question 2

When establishing a calibration interval for measurement equipment, which factor is most important to consider?

Accepted Answer

Usage frequency, measurement criticality, and historical calibration stability

Answer

Equipment purchase price

Answer

Storage location of the equipment

Answer

Equipment manufacturer's country of origin

Question 3

In acceptance sampling, the Lot Tolerance Percent Defective (LTPD) represents:

Accepted Answer

The quality level at which lots should be rejected with a high probability (consumer's risk protection)

Answer

The target quality level for a supplier's process

Answer

The average outgoing quality after rectifying inspection

Answer

The AQL specified in the purchase order

Question 4

What is the key difference between precision and accuracy in measurement?

Accepted Answer

Precision refers to repeatability of measurements; accuracy refers to closeness to the true value

Answer

Accuracy refers to repeatability; precision refers to closeness to truth

Answer

They are synonymous in metrology

Answer

Precision applies to attributes; accuracy applies to variables

Question 5

Which sampling plan standard is most commonly referenced for attribute inspection in US manufacturing?

Accepted Answer

ANSI/ASQ Z1.4

Answer

ISO 3951

Answer

MIL-STD-1916

Answer

ASTM E2234

Question 6

What does Average Outgoing Quality (AOQ) represent in acceptance sampling with rectifying inspection?

Accepted Answer

The average quality of accepted lots after defectives are replaced during rejected lot screening

Answer

The incoming quality level submitted by the supplier

Answer

The total defects found during all inspections

Answer

The AQL achieved over a year of production