A double sampling plan is specified below. \begin{array}{l|c|c|c} \hline \textbf{Stage} & n & c & r \\ \hline \text{First} & 80 & 1 & 4 \\ \text{Second} & 80 & 4 & 5 \\ \hline \end{array} The first sample contains 3 nonconforming units. What happens next?

A second sample of 80 is drawn before deciding

The lot is accepted, since 3 is below the rejection number

The lot is rejected, since 3 exceeds the acceptance number

The first sample is discarded and re-drawn

Are the questions aligned with the ASQ CQPA Body of Knowledge?

Yes. Each question is written around topics included in the published CQPA Body of Knowledge and is tagged to the relevant BoK area. These are original practice questions and are not copied from the actual ASQ exam.

In Review Mode, you receive the correct answer and explanation immediately after answering each question. It is designed for learning, not just scoring, so you can correct misunderstandings before moving to the next question.

Does the quiz include calculations?

Yes. The free set includes a balanced mix of conceptual questions, applied scenarios and short calculations. The goal is to help you experience several common CQPA question styles.

What is included in the full CQPA practice-question package?

The complete package provides additional CQPA-style practice sets with broader Body of Knowledge coverage, detailed explanations and more opportunities to work on calculations, scenarios and commonly confused concepts.

Does purchasing the practice tests include the ASQ examination?

No. These are independent exam-preparation materials. Registration, eligibility review and the official certification examination are handled separately by ASQ.

ASQ CQPA Sampling Practice Quiz

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Free sample questions

1 questions from this set, shown in full with the correct answer and the reasoning behind it. Read them as a study resource.

Q1.A double sampling plan is specified below.

$\begin{array}{l|c|c|c} \hline \textbf{Stage} & n & c & r \\ \hline \text{First} & 80 & 1 & 4 \\ \text{Second} & 80 & 4 & 5 \\ \hline \end{array}$

The first sample contains 3 nonconforming units. What happens next?
- A.A second sample of 80 is drawn before deciding✓ Correct answer
- B.The lot is accepted, since 3 is below the rejection number
- C.The lot is rejected, since 3 exceeds the acceptance number
- D.The first sample is discarded and re-drawn
Explanation
In a double plan the first stage has three outcomes: accept at or below $c$ , reject at or above $r$ , and take a second sample in between. With 3 nonconforming, the count sits above the acceptance number of 1 and below the rejection number of 4, so the second sample is drawn and the combined total is judged against the second-stage numbers.
Reference: CQPA BoK III

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This paid 25-question practice quiz focuses specifically on Sampling, Section III.C of the CQPA Body of Knowledge.

The questions include a practical mix of:

Population versus sample
Random sampling
Simple random sampling
Systematic sampling
Stratified sampling
Cluster sampling
Sampling bias
Representative samples
Sample size considerations
Sampling error
Sources of sampling variation
Acceptance sampling concepts
Lot and sample terminology
Producer's risk and consumer's risk
Acceptable Quality Limit (AQL)
Interpreting sampling results
Workplace-based scenarios
Short calculations
Plausible distractors based on common misunderstandings

Learn from Every Question

This quiz is offered in Review Mode, so you will see the correct answer and a clear explanation immediately after each response.

Each explanation helps you understand:

Why the correct answer is right
Which sampling concept is being tested
Why the other options are less appropriate
How to select an appropriate sampling approach
How similar concepts may appear in a CQPA-style question

The goal is not simply to check your score. It is to help you understand how sampling is used to collect representative data, evaluate quality, and support sound process decisions.

Part of the Paid CQPA Practice Package

This 25-question quiz is included in the complete CQPA Practice Test Package.

Use it to:

Strengthen your understanding of sampling fundamentals
Distinguish between common sampling methods
Recognize sources of sampling bias and error
Improve your understanding of representative samples
Practise acceptance sampling concepts
Apply sampling principles to workplace situations
Identify gaps in your sampling knowledge
Improve your readiness for the CQPA exam

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What this quiz covers

Data Analysis

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CQPA - 7. Sampling