CERTIFIED ENERGY MANAGER (CEM)
PRACTICE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
1. What is the primary goal of energy management?
A. Increase equipment size
B. Reduce maintenance operations
C. Minimize energy cost while maintaining performance
D. Eliminate energy use completely
Rationale: Energy management focuses on reducing cost and consumption
without degrading system performance.
2. Which unit is commonly used to measure electrical energy?
A. Volt
B. Ampere
C. Kilowatt-hour
D. Ohm
Rationale: kWh is the standard billing unit for electrical energy.
3. Power factor is defined as the ratio of:
A. Real power / Apparent resistance
B. Real voltage / Apparent power
C. Real power / Apparent power
D. Reactive power / Real power
Rationale: PF compares useful power to total supplied power.
,4. A device used to correct low power factor is a:
A. Transformer
B. Capacitor bank
C. Induction motor
D. Converter
Rationale: Capacitors offset inductive loads and improve PF.
5. Which HVAC system is most energy efficient for large buildings?
A. Window AC units
B. Gas-fired furnaces
C. Variable Air Volume systems
D. Electric resistance heaters
Rationale: VAV systems minimize airflow and reduce fan energy.
6. The baseline in energy benchmarking refers to:
A. Environmental regulation
B. Reference performance before improvements
C. Tax incentives
D. Future performance projection
Rationale: Baseline is the starting point for evaluating savings.
7. A therm is equivalent to approximately:
A. 10,000 BTU
B. 50,000 BTU
C. 100,000 BTU
D. 1,000,000 BTU
Rationale: A therm is defined as 100,000 BTU.
8. The purpose of an energy audit is to:
A. Replace all existing equipment
B. Identify energy savings opportunities
C. Increase utility bills
, D. Rewire electrical circuits
Rationale: Audits aim to pinpoint inefficiencies and savings.
9. Which lighting technology typically has the highest efficacy?
A. Incandescent
B. Halogen
C. CFL
D. LED
Rationale: LEDs provide high lumens per watt and long life.
10. A building’s thermal envelope includes:
A. Furniture
B. Appliances
C. Walls, roof, windows, foundation
D. Plumbing
Rationale: The envelope separates conditioned and unconditioned spaces.
11. What type of energy audit provides the most detailed analysis?
A. Walk-through audit
B. Preliminary audit
C. Level 1 audit
D. Level 3 audit
Rationale: A Level 3 audit includes detailed engineering analysis and cost
modeling.
12. The law that states energy cannot be created or destroyed is:
A. Second law of thermodynamics
B. First law of thermodynamics
C. Newton’s first law
D. Joule’s law
Rationale: The first law explains conservation of energy.
13. Demand charges on utility bills are based on:
PRACTICE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
1. What is the primary goal of energy management?
A. Increase equipment size
B. Reduce maintenance operations
C. Minimize energy cost while maintaining performance
D. Eliminate energy use completely
Rationale: Energy management focuses on reducing cost and consumption
without degrading system performance.
2. Which unit is commonly used to measure electrical energy?
A. Volt
B. Ampere
C. Kilowatt-hour
D. Ohm
Rationale: kWh is the standard billing unit for electrical energy.
3. Power factor is defined as the ratio of:
A. Real power / Apparent resistance
B. Real voltage / Apparent power
C. Real power / Apparent power
D. Reactive power / Real power
Rationale: PF compares useful power to total supplied power.
,4. A device used to correct low power factor is a:
A. Transformer
B. Capacitor bank
C. Induction motor
D. Converter
Rationale: Capacitors offset inductive loads and improve PF.
5. Which HVAC system is most energy efficient for large buildings?
A. Window AC units
B. Gas-fired furnaces
C. Variable Air Volume systems
D. Electric resistance heaters
Rationale: VAV systems minimize airflow and reduce fan energy.
6. The baseline in energy benchmarking refers to:
A. Environmental regulation
B. Reference performance before improvements
C. Tax incentives
D. Future performance projection
Rationale: Baseline is the starting point for evaluating savings.
7. A therm is equivalent to approximately:
A. 10,000 BTU
B. 50,000 BTU
C. 100,000 BTU
D. 1,000,000 BTU
Rationale: A therm is defined as 100,000 BTU.
8. The purpose of an energy audit is to:
A. Replace all existing equipment
B. Identify energy savings opportunities
C. Increase utility bills
, D. Rewire electrical circuits
Rationale: Audits aim to pinpoint inefficiencies and savings.
9. Which lighting technology typically has the highest efficacy?
A. Incandescent
B. Halogen
C. CFL
D. LED
Rationale: LEDs provide high lumens per watt and long life.
10. A building’s thermal envelope includes:
A. Furniture
B. Appliances
C. Walls, roof, windows, foundation
D. Plumbing
Rationale: The envelope separates conditioned and unconditioned spaces.
11. What type of energy audit provides the most detailed analysis?
A. Walk-through audit
B. Preliminary audit
C. Level 1 audit
D. Level 3 audit
Rationale: A Level 3 audit includes detailed engineering analysis and cost
modeling.
12. The law that states energy cannot be created or destroyed is:
A. Second law of thermodynamics
B. First law of thermodynamics
C. Newton’s first law
D. Joule’s law
Rationale: The first law explains conservation of energy.
13. Demand charges on utility bills are based on:
