CERTIFIED ENERGY MANAGER
EXAMINATION Practice Exam Questions
with Answers and Rationales Question
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A |Instant
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Q1.
Which unit is commonly used to measure electrical energy consumption?
A. Watt
B. Kilowatt-hour
C. Volt
D. Ampere
Rationale: Energy consumption over time is measured in kWh, not watts.
Q2.
The largest energy use in commercial buildings typically comes from:
A. Office equipment
B. HVAC systems
C. Exterior lighting
D. Plumbing
Rationale: HVAC accounts for the greatest share of energy use in most
commercial facilities.
Q3.
,Which law states that energy cannot be created or destroyed?
A. Newton’s First Law
B. First Law of Thermodynamics
C. Second Law of Thermodynamics
D. Carnot’s Law
Rationale: The First Law defines conservation of energy.
Q4.
Power factor is defined as the ratio of:
A. Real power to reactive power
B. Apparent power to reactive power
C. Real power to apparent power
D. Real power to voltage
Rationale: PF = kW ÷ kVA.
Q5.
Which lighting technology is the most energy efficient?
A. Incandescent
B. Halogen
C. CFL
D. LED
Rationale: LEDs offer highest efficacy and longest life.
Q6.
A therm’s energy content is approximately:
A. 10,000 BTU
B. 50,000 BTU
C. 100,000 BTU
D. 250,000 BTU
Rationale: One therm equals roughly 100,000 BTU.
Q7.
, What device measures airflow in HVAC systems?
A. Psychrometer
B. Manometer
C. Anemometer
D. Hygrometer
Rationale: Anemometers measure air velocity and airflow.
Q8.
Baseload energy consumption refers to:
A. Seasonal loads
B. Peak loads
C. Minimum continuous loads
D. Weekend-only loads
Rationale: Baseload is the constant, unavoidable energy use.
Q9.
Which fuel has the highest CO₂ emissions per unit energy?
A. Natural gas
B. Propane
C. Gasoline
D. Coal
Rationale: Coal is the most carbon-intensive major fuel.
Q10.
A VFD is used primarily to control:
A. Voltage
B. Temperature
C. Electrical safety
D. Motor speed
Rationale: Variable Frequency Drives adjust motor speed to match load.
Q11.
EXAMINATION Practice Exam Questions
with Answers and Rationales Question
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A |Instant
Download Pdf
Q1.
Which unit is commonly used to measure electrical energy consumption?
A. Watt
B. Kilowatt-hour
C. Volt
D. Ampere
Rationale: Energy consumption over time is measured in kWh, not watts.
Q2.
The largest energy use in commercial buildings typically comes from:
A. Office equipment
B. HVAC systems
C. Exterior lighting
D. Plumbing
Rationale: HVAC accounts for the greatest share of energy use in most
commercial facilities.
Q3.
,Which law states that energy cannot be created or destroyed?
A. Newton’s First Law
B. First Law of Thermodynamics
C. Second Law of Thermodynamics
D. Carnot’s Law
Rationale: The First Law defines conservation of energy.
Q4.
Power factor is defined as the ratio of:
A. Real power to reactive power
B. Apparent power to reactive power
C. Real power to apparent power
D. Real power to voltage
Rationale: PF = kW ÷ kVA.
Q5.
Which lighting technology is the most energy efficient?
A. Incandescent
B. Halogen
C. CFL
D. LED
Rationale: LEDs offer highest efficacy and longest life.
Q6.
A therm’s energy content is approximately:
A. 10,000 BTU
B. 50,000 BTU
C. 100,000 BTU
D. 250,000 BTU
Rationale: One therm equals roughly 100,000 BTU.
Q7.
, What device measures airflow in HVAC systems?
A. Psychrometer
B. Manometer
C. Anemometer
D. Hygrometer
Rationale: Anemometers measure air velocity and airflow.
Q8.
Baseload energy consumption refers to:
A. Seasonal loads
B. Peak loads
C. Minimum continuous loads
D. Weekend-only loads
Rationale: Baseload is the constant, unavoidable energy use.
Q9.
Which fuel has the highest CO₂ emissions per unit energy?
A. Natural gas
B. Propane
C. Gasoline
D. Coal
Rationale: Coal is the most carbon-intensive major fuel.
Q10.
A VFD is used primarily to control:
A. Voltage
B. Temperature
C. Electrical safety
D. Motor speed
Rationale: Variable Frequency Drives adjust motor speed to match load.
Q11.
