1. Energy and Sustainability Policies, Codes and Standards
Key exam domainIdentify weak areas and improve with focused review.
Start PracticingPass your CEM certification
Free CEM Practice Test
Pass the Certified Energy Manager exam with confidence.
Start with a free CEM practice test and build exam-ready confidence for the Certified Energy Manager exam.
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1000+CEM Questions
14Exam Domains
10Free Questions
2026Updated
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Everything your CEM certification prep needs
Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.
Expert-vetted questions
Every question is reviewed by an experienced CEM professional for clarity, accuracy and practical exam relevance.
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Domain analytics show which parts of the exam blueprint are holding you back.
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Study by domain
Practice the CEM exam by domain
2. Energy Rates, Tariffs and Supply Options
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing3. Energy Audits and Instrumentation
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing4. Energy Accounting and Economics
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing5. Electrical Power Systems and Motors
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing6. Lighting Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing7. HVAC Systems and Building Envelope
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing8. Building Automation, Controls and Artificial Intelligence Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing9. Energy Storage Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing10. Boiler and Steam Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing11. Distributed Generation & Renewable Energy Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing12. Industrial Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing13. Operations, Maintenance and Commissioning
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing14. Energy Savings Performance Contracting and Measurement & Verification
Key exam domainIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the CEM exam, the questions, pricing, the free trial, and how this fits your prep.
The CEM exam spans 14 domains - Energy and Sustainability Policies, Codes and Standards, Energy Rates, Tariffs and Supply Options, Energy Audits and Instrumentation, Energy Accounting and Economics, Electrical Power Systems and Motors, Lighting Systems, HVAC Systems and Building Envelope, Building Automation, Controls and Artificial Intelligence Systems, Energy Storage Systems, Boiler and Steam Systems, Distributed Generation & Renewable Energy Systems, Industrial Systems, Operations, Maintenance and Commissioning, and Energy Savings Performance Contracting and Measurement & Verification. Every practice question maps to one of them, so you train on exactly what's tested.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the CEM exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. CEM Exam Prep is an independent study resource for Certified Energy Manager (CEM). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.
Every paid plan unlocks the full bank of 1,000+ practice questions covering all 14 CEM domains - Energy and Sustainability Policies, Codes and Standards, Energy Rates, Tariffs and Supply Options, Energy Audits and Instrumentation, Energy Accounting and Economics, Electrical Power Systems and Motors, Lighting Systems, HVAC Systems and Building Envelope, Building Automation, Controls and Artificial Intelligence Systems, Energy Storage Systems, Boiler and Steam Systems, Distributed Generation & Renewable Energy Systems, Industrial Systems, Operations, Maintenance and Commissioning, and Energy Savings Performance Contracting and Measurement & Verification. You can practice the whole bank, filter by domain, or run a timed, domain-balanced exam simulation.
Yes - the bank is maintained against the current exam outline, and questions are revised when the exam changes.
No honest practice platform can guarantee a pass. What realistic practice does is show you - before exam day - exactly which domains are weak, and give you the repetitions to fix them. That's the difference between hoping you're ready and knowing where you stand.
Yes. You get 10 free sample questions with instant feedback - no credit card and no account required.
The free sample shows you the question quality. Paid plans unlock the full 1,000+ question bank, exam-style practice modes, mistake review, and - on Fast Track and Pass Confidence - progress analytics that show your readiness by domain.
No. Every plan is a single one-time payment for a fixed access window - 48 hours, 7 days, or 6 weeks. There is no auto-renewal and no recurring billing.
Match it to your exam date: Final Review (2 days) for an exam in the next day or two, Fast Track (7 days) for an exam this week, Pass Confidence (6 weeks) for a structured run-up.
For most countries, the price you see is exactly what you pay - tax is already included. Where local law requires it to be added separately, it's shown clearly at checkout before you pay, so there are never any surprise fees.
Access is instant after payment and runs for your plan's full window from that moment. When the window ends, your local progress stays on your device - you can buy another window any time and pick up where you left off.
Yes - the whole platform is mobile-first: practice, mistake review, and analytics all work on any phone, tablet, or laptop with a browser. Nothing to install.
Every answer feeds your per-domain accuracy, readiness score, and weak-area list. Instead of re-reading everything, you drill the domains that are actually costing you points - that's what moves a score in days, not months.
Email us any time. The contact link is in the footer. Payments are processed securely by Polar, and active customers can download an invoice from their profile page.
Make sure you're signed in with the same email you used at checkout - access activates within a minute of payment. If it still doesn't appear, email us from the contact link in the footer and it'll be sorted out.
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Drill a single domain, run a mixed session, or sit a full timed exam simulation - pick the mode that fits your study window.
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Focus on one CEM domain at a time - pick it here, then choose a mode.
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Re-drill the questions you got wrong.
Review now →Review Weak Domains
Drill your lowest-scoring domains first.
Find weak spots →All Questions
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Trusted by CEM candidates
Real feedback from CEM candidates on Reddit.
"wasnt sure id pass but the practice questions on cemexam.web.app were pretty close to the real thing. boiler and steam stuff especially. did like two weeks of questions, felt decent going in. passed first try."
"honestly i put off studying for way longer than i should have and was definately behind by the time i got serious. what helped was being able to see which areas i kept getting wrong and just drilling those."
"skeptical of these exam prep sites in general but this one did the job. the mock exams felt realistic. m&v questions tripped me up at first but after a few rounds i stopped second-guessing myself."