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100+ Free PECB Six Sigma Green Belt Practice Questions

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Key Facts: PECB Six Sigma Green Belt Exam

150 MCQ

Official exam length

PECB Candidate Handbook – Six Sigma Green Belt

3 hours

Exam duration

PECB training partners / exam listings

70%

Passing score

PECB Candidate Handbook – Six Sigma Green Belt

Open-book

Exam type

PECB Candidate Handbook – Six Sigma Green Belt

29%

Heaviest domain: planning & completing projects

PECB Candidate Handbook domain blueprint

3 years

Certification validity cycle

PECB certification maintenance policy

300 hours

Project experience for full Green Belt (handbook)

PECB Candidate Handbook v1.5

Day 5

Certification exam day in 5-day course agenda

PECB Six Sigma Green Belt course page

PECB Six Sigma Green Belt: 150 open-book MCQs in 3 hours, 70% pass. Domains cover fundamentals (12%), DMAIC (16%), data-based decisions (13%), project planning/completion (29%), statistical tools (13%), and process improvement/problem solving (17%). Full credential also requires experience and project hours after the exam.

Sample PECB Six Sigma Green Belt Practice Questions

Try these sample questions to test your PECB Six Sigma Green Belt exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary aim of Six Sigma as applied by a PECB Green Belt?
A.Reduce process variation and defects using a disciplined, data-driven method
B.Eliminate all quality inspection activities
C.Maximize headcount on every improvement project
D.Replace process metrics with opinion-based prioritization
Explanation: Six Sigma focuses on reducing variation and defects through structured, data-driven improvement (typically DMAIC) so processes better meet customer requirements.
2DMAIC stands for which sequence?
A.Define, Measure, Analyze, Improve, Control
B.Design, Manufacture, Assemble, Inspect, Correct
C.Define, Model, Assess, Implement, Close
D.Diagnose, Measure, Audit, Improve, Certify
Explanation: DMAIC is Define, Measure, Analyze, Improve, and Control—the core Six Sigma project roadmap for existing processes.
3Which role typically sponsors Six Sigma projects, removes organizational barriers, and aligns projects to strategy?
A.Champion (or Sponsor)
B.Yellow Belt only
C.Process operator exclusively
D.External customer auditor
Explanation: Champions (sponsors) select and support projects, allocate resources, remove barriers, and ensure strategic alignment. Green Belts and Black Belts execute; Yellow Belts support team work.
4What is the typical focus of a Green Belt compared with a Black Belt?
A.Lead mid-scope projects part-time and support Black Belt projects within their function
B.Own enterprise Six Sigma strategy and coach all Black Belts full-time
C.Only collect data with no analysis responsibility
D.Certify other Green Belts as a primary full-time job
Explanation: Green Belts usually lead moderately complex projects (often part-time in their area) and assist Black Belts. Master Black Belts coach strategy and the belt network; Black Belts lead larger or more complex efforts.
5In Six Sigma, a CTQ (Critical to Quality) characteristic is best described as:
A.A measurable product or process attribute that is critical to meeting customer requirements
B.Any cost metric reported on the income statement
C.The name of the project charter template
D.A non-measurable customer complaint theme only
Explanation: CTQs translate customer needs (VOC) into measurable requirements the process must satisfy. They drive metrics, specifications, and project goals.
6Which document typically captures problem statement, scope, goals, stakeholders, timeline, and team for a Green Belt project?
A.Project charter
B.Control chart only
C.Final invoice
D.Employee handbook
Explanation: The project charter (Define phase) authorizes and frames the project: problem, business case, scope, goals, team, stakeholders, and high-level schedule.
7SIPOC is primarily used to:
A.Map Suppliers, Inputs, Process, Outputs, and Customers at a high level
B.Calculate process capability indices only
C.Replace root-cause analysis entirely
D.Set control chart limits automatically
Explanation: SIPOC is a high-level process map used early (Define/Measure) to align on boundaries, inputs/outputs, and customers before detailed mapping or data collection.
8Which of the following best describes common-cause variation?
A.Natural, inherent process variation present when the process is stable
B.A one-time machine breakdown that should always be ignored
C.Only variation caused by operator sabotage
D.Variation that always requires stopping the line immediately
Explanation: Common-cause (systemic) variation is the stable, everyday noise of a process in statistical control. Special causes are assignable events that need investigation; treating common cause as special can worsen performance (tampering).
9A Yellow Belt’s primary contribution on a Six Sigma team is typically to:
A.Support data collection and participate in local improvement activities
B.Act as executive sponsor for the portfolio
C.Replace the Master Black Belt as coach of all Black Belts
D.Solely approve capital expenditures for all plants
Explanation: Yellow Belts have introductory training and contribute as team members—collecting data, applying basic tools, and supporting local improvements—not sponsorship or enterprise coaching.
10Which statement correctly distinguishes Lean and Six Sigma?
A.Lean primarily attacks waste and flow; Six Sigma primarily attacks variation and defects—together they improve speed and quality
B.Lean only uses advanced DOE; Six Sigma only uses 5S
C.Lean forbids data; Six Sigma forbids process maps
D.They are identical methodologies with different belt colors only
Explanation: Lean emphasizes waste removal, flow, and cycle time; Six Sigma emphasizes statistical rigor to reduce variation and defects. Integrated Lean Six Sigma uses both toolsets within DMAIC.

About the PECB Six Sigma Green Belt Exam

The PECB Certified Six Sigma Green Belt exam validates that candidates can lead and support process-improvement projects using DMAIC, apply basic statistical and lean tools, make data-based decisions, and sustain gains with control plans and metrics. The open-book assessment emphasizes applying Green Belt methods to organizational problems rather than pure memorization.

Assessment

150 multiple-choice items across six competency domains; mix of standalone and scenario-based questions. Cognitive mix roughly 41% comprehension/application/analysis and 59% evaluation per handbook blueprint.

Time Limit

3 hours

Passing Score

70%

Exam Fee

Included with PECB training package; exam-only Manager-level fee $700 USD (handbook); certification application $500 USD if not included (PECB (Professional Evaluation and Certification Board))

PECB Six Sigma Green Belt Exam Content Outline

12%

Fundamental Principles and Concepts of Six Sigma Green Belt

Six Sigma principles, Green Belt concepts and terminology, stakeholders, organizational structure, and project-management practices for Green Belt projects

16%

Implementation of Rigorous DMAIC Methodology

Problem definition, DMAIC step identification, methodology selection/justification, effectiveness monitoring, and continuing improvement mechanisms

13%

The Use of Data-Based Decision Making

Improvement tools, stratification/value-add/root-cause analysis, control and run charts, nonconformity treatment, Six Sigma metrics, and embedding solutions

29%

Planning and Completing Six Sigma Projects

Families of measures, control plans, roles, special vs common causes, runs rules, productivity/quality measures, and PFQT analysis

13%

Interpretation of Statistical Tools

Data collection, sampling, central tendency and variability, graphical displays (Pareto, bar, histogram), and validating improvement

17%

Improvement of Processes and How to Solve Organizational Problems

Solution development, structured idea methods, GRES methodology, structural vs attitudinal change, alignment, monitoring, and sustainment

How to Pass the PECB Six Sigma Green Belt Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: 150 multiple-choice items across six competency domains; mix of standalone and scenario-based questions. Cognitive mix roughly 41% comprehension/application/analysis and 59% evaluation per handbook blueprint.
  • Time limit: 3 hours
  • Exam fee: Included with PECB training package; exam-only Manager-level fee $700 USD (handbook); certification application $500 USD if not included

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

PECB Six Sigma Green Belt Study Tips from Top Performers

1Memorize core formulas (DPMO, yield, Cp, Cpk) so open-book time is spent on scenario interpretation, not looking up basics
2Map every tool to a DMAIC phase: charter/SIPOC/VOC in Define; MSA/sampling/baseline metrics in Measure; fishbone/5 Whys/Pareto/hypothesis in Analyze; FMEA/pilot/lean in Improve; control plan/charts/response plan in Control
3Drill special-cause vs common-cause variation and standard runs rules for out-of-control signals
4Practice distinguishing belt roles: Champions sponsor; MBBs coach strategy; Black Belts lead complex projects; Green Belts lead mid-scope projects and support Black Belts; Yellow Belts participate
5Use GRES and structured solution methods when the stem asks how to generate or prioritize improvements
6For open-book success, tab notes by domain (metrics, charts, lean wastes, project documents) rather than reading linearly during the exam
7Work mixed calculation sets under a 1.2-minute-per-question budget (150 items / 180 minutes)

Frequently Asked Questions

What is the PECB Six Sigma Green Belt exam format?

The official exam has 150 multiple-choice questions to complete in 3 hours. It is open-book: you may use training materials, personal notes from the course, and permitted references via the PECB Exams app and/or print. Official items have three options (one correct). The passing score is 70%. Online multiple-choice results are typically immediate.

Is the PECB Six Sigma Green Belt exam open-book or closed-book?

It is open-book per the PECB Six Sigma Green Belt Candidate Handbook. Allowed references include a copy of the standard (via the app and/or printed), training course materials, and personal notes from the training course.

What domains does the PECB Six Sigma Green Belt exam cover?

Six domains: (1) fundamental principles and concepts (12%, 18 Q), (2) rigorous DMAIC methodology (16%, 24 Q), (3) data-based decision making (13%, 19 Q), (4) planning and completing Six Sigma projects (29%, 43 Q), (5) interpretation of statistical tools (13%, 20 Q), and (6) process improvement and organizational problem solving (17%, 26 Q).

What experience is required for the full PECB Certified Six Sigma Green Belt credential?

After passing the exam, the full Green Belt credential (Candidate Handbook v1.5) requires at least secondary education, five years of professional experience including two years of process-improvement experience, Six Sigma project activities totaling 300 hours following best practices, two professional references, and signing the PECB Code of Ethics. A Provisional Green Belt path exists with no experience requirement for candidates who pass the exam.

How long is PECB Six Sigma Green Belt certification valid?

PECB certifications are valid for three years. Holders must meet continuing professional development (CPD) requirements for the credential and pay the annual maintenance fee (AMF) to keep the certification active.

What calculation skills should Green Belt candidates practice?

Expect defect metrics (DPU, DPO, DPMO), process yield and rolled throughput yield, basic process capability (Cp and Cpk), cycle/takt time concepts, defect rates, control-limit thinking (±3σ for common control charts), and basic probability. Bring strong formula fluency even though the exam is open-book—time pressure rewards fast, accurate application.