Free CEM Practice Test
Certified Energy Manager Exam Prep
Last updated: September 2026
The Certified Energy Manager (CEM) exam, administered by the Association of Energy Engineers, is a professional certification for energy engineers, facility managers, and consultants. It requires meeting specific education and experience eligibility requirements before you can register. Use these free practice questions to prepare for the exam's core content areas.
CEM Eligibility & Exam Format
Unlike many certification exams, CEM has strict eligibility requirements — you'll need a relevant four-year degree combined with several years of energy management experience (or a PE/RA license with relevant experience), plus completion of a mandatory AEE prep course before you can register. The exam itself has 130 multiple-choice questions with a 4-hour time limit and no scheduled breaks. Scoring is scaled from 0-1,040, with 700 needed to pass — there's no penalty for wrong answers, so answer every question. If you don't pass, you can retake after a 60-day waiting period.
- Prerequisites & Eligibility: Candidates must qualify under specific education and experience tiers (such as a 4-year engineering/architecture degree with 3+ years of energy experience, a 4-year science/business degree with 4+ years, a 2-year technical degree with 6+ years, or a PE/RA license with 3+ years), plus completion of a mandatory AEE prep seminar.
- 130 Multiple-Choice Questions: Administered in a single continuous 4-hour testing session without scheduled breaks.
- Scaled Scoring Scale (0–1,040): A minimum scaled score of 700 is required to achieve CEM certification.
- No Deduction for Wrong Answers: Scoring is based solely on total correct answers; test-takers should answer every single question without leaving blanks.
- Retake Policy: If a candidate does not pass on their initial attempt, a mandatory 60-day waiting period is required before retaking the examination.
The examination is computer-based and administered through authorized Pearson VUE testing centers or via remote proctoring.
What the CEM Exam Covers
Energy & Sustainability Policies, Codes & Standards
ASHRAE Standard 90.1, International Energy Conservation Code (IECC), ISO 50001 energy management systems, federal mandates, and utility decarbonization frameworks.
Energy Auditing & M&V Protocols
ASHRAE Level 1, 2, and 3 audit methodologies, data logging, utility tariff structures, weather normalization, and IPMVP Options A–D measurement and verification.
Energy Economics & Financial Analysis
Simple payback period (SPP), return on investment (ROI), Net Present Value (NPV), Internal Rate of Return (IRR), and Life-Cycle Cost Analysis (LCCA).
Electrical Systems & Power Distribution
Three-phase electrical calculations, power factor correction, demand charges, transformer loading, harmonic distortion, and motor efficiency.
Lighting Systems & Efficiency Upgrades
Luminous efficacy (lumens/watt), LED retrofits, lighting power density (LPD), daylight harvesting, and occupancy/photocell controls.
HVAC Systems & Equipment Optimization
Chillers, rooftop units (RTUs), economizers, variable refrigerant flow (VRF), COP/EER/SEER/kW-per-ton metrics, and psychrometric analysis.
Building Automation & Controls
Direct Digital Control (DDC) architectures, trim-and-respond setpoint resets, scheduled setbacks, demand-controlled ventilation (DCV), and BAS trending.
Boilers, Steam Systems & Thermal Energy
Combustion efficiency, flue gas analysis, boiler blowdown heat recovery, steam trap maintenance, and condensate return optimization.
Renewable Energy & Energy Storage Integration
Solar photovoltaic (PV) sizing, capacity factor calculations, battery energy storage systems (BESS), peak shaving, and demand response strategies.
Project Implementation & Program Development
Energy savings performance contracting (ESPC), commissioning and retro-commissioning (RCx), operations & maintenance (O&M), and organizational energy policy.
Why Financial Analysis Deserves Real Study Time
CEM candidates often come from strong technical and engineering backgrounds but have weaker financial backgrounds. Questions involving simple payback calculations, return on investment (ROI), net present value (NPV), and financial justification for energy projects carry equal weight to technical equipment questions and can be an unexpected weak spot worth deliberate practice.
Free CEM Practice Questions
An energy auditor is conducting an ASHRAE Level 2 energy audit of a 120,000 sq ft commercial office building. According to ASHRAE energy audit procedures and standard facility evaluation protocols, what fundamentally distinguishes an ASHRAE Level 2 audit from an ASHRAE Level 1 audit?
Under the International Performance Measurement and Verification Protocol (IPMVP), an energy manager installs variable frequency drives (VFDs) on two 50-hp chilled water pumps. Savings are determined by measuring continuous electrical power (kW) on the pump motors before and after installation while stipulating constant annual operating hours based on building scheduling. Which IPMVP option is being utilized?
A facility proposes replacing 400 existing metal halide high-bay fixtures (458 W each including ballast) with high-efficiency LED high-bay fixtures (150 W each). The facility operates 4,000 hours per year, and the blended electricity rate is $0.10 per kWh. The total turnkey cost for equipment and installation is $74,000. What is the simple payback period (SPP) for this energy conservation project?
An energy engineer is evaluating two HVAC replacement options for an institutional facility over a 15-year life cycle with an 8% discount rate. System A has a lower initial capital cost ($120,000) but higher annual energy and maintenance costs ($18,000/year). System B costs $180,000 initially but requires only $9,000/year in energy and maintenance. Given the Present Worth Factor for a uniform annual series (P/A, 8%, 15 yrs) = 8.5595, what is the Net Present Cost (Life-Cycle Cost) of System B compared to System A?
A 500-ton water-cooled centrifugal chiller operates with an efficiency rating of 0.56 kW/ton at full load. What is the equivalent full-load Coefficient of Performance (COP) for this chiller? (Note: 1 ton of refrigeration = 12,000 Btu/hr; 1 kW = 3,412 Btu/hr).
An industrial facility has an uncorrected average electrical load of 800 kW with an uncorrected power factor (PF) of 0.72 lagging. The utility charges a monthly power factor penalty for any billing power factor below 0.95. Approximately how many kilovars (kVAR) of capacitive power factor correction are required to improve the facility's power factor from 0.72 to 0.95?
A commercial building installs a 250 kW-DC rooftop solar photovoltaic (PV) array. Over the course of a 365-day year, the system generates 383,250 kWh of alternating current (AC) electricity delivered to the building's electrical switchgear. What is the annual capacity factor (CF) of this solar PV system?
In a modern Variable Air Volume (VAV) air handling system governed by a Direct Digital Control (DDC) building automation system, which advanced control strategy dynamically resets the supply duct static pressure setpoint to minimize supply fan energy while ensuring occupant comfort?
How to Prepare for the CEM Exam
Confirm Eligibility & Complete the AEE Course Early
Unlike open registration exams, CEM requires specific education and energy management experience credentials, plus completion of a mandatory AEE preparatory course before sitting for the exam. Verify your eligibility pathway and schedule your prep seminar well in advance.
Dedicate Focused Practice to Financial Analysis & Cash Flow Math
Many engineering and facility candidates have deep technical expertise in HVAC or electrical gear but stumble on financial justification questions. Thoroughly practice simple payback, Net Present Value (NPV), Life-Cycle Cost Analysis (LCCA), and savings-to-investment ratio calculations.
Manage the 4-Hour Time Limit Strategically
With 130 questions in 240 minutes, you have roughly 1.8 minutes per question. Flag complex multi-step thermal and electrical calculation problems on your first pass, secure points on conceptual questions quickly, and return to calculation-heavy questions with your remaining time.
Identify Your Industry Sub-Specialty Gaps
If your career is lighting- or building-envelope-heavy, dedicate extra study time to boilers, steam systems, and psychrometrics. If you are an HVAC specialist, invest time into three-phase electrical power factor correction and renewable energy storage.
Study AEE's Official Body of Knowledge & Reference Guides
The CEM exam questions map directly to the Association of Energy Engineers official body of knowledge domains. Use official formulas, practice handbooks, and reference tables to ensure familiarity with AEE's standard problem phrasing.
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