PIC Quality Acceptance Sampling 2

Question 1

What is the primary purpose of a Lot in quality acceptance sampling for asphalt paving?

Accepted Answer

To group material for statistical evaluation of uniformity

Answer

A Lot is a defined quantity of material grouped together so that statistical sampling can evaluate whether the entire production meets specification.

Question 2

When a sublot sample fails a test, which action is most appropriate before rejecting the entire lot?

Accepted Answer

Increase the number of sublot samples and retest

Answer

Increasing sampling frequency and retesting gives a statistically more reliable picture before a full lot rejection decision is made.

Question 3

Which statistical term describes the spread of individual test results around the mean in acceptance sampling?

Accepted Answer

Standard deviation

Answer

Standard deviation quantifies how much individual measurements vary from the mean, directly affecting quality index calculations.

Question 4

A pavement inspector receives a mix with an asphalt binder content of 5.8% against a job mix formula target of 5.4% ± 0.3%. What is the correct assessment?

Accepted Answer

The mix is out of specification and should be flagged for rejection

Answer

5.8% exceeds the upper tolerance limit of 5.7% (5.4 + 0.3), so the material falls outside specification.

Question 5

In stratified random sampling, the pavement area is divided into segments primarily to:

Accepted Answer

Ensure samples represent the entire lot uniformly

Answer

Stratification ensures every section of the lot has an equal chance of being sampled, preventing bias toward one part of the job.

(PIC) Paving Inspector Certification Practice Test

(PIC) Paving Inspector Certification Practice Test

PIC Quality Acceptance Sampling 2