Certified Energy Manager (CEM – AEE)
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1.
In a building energy audit, which instrument is MOST appropriate for measuring
air velocity in ductwork?
A. Anemometer
B. Hygrometer
C. Manometer
D. Infrared camera
Answer: A
Rationale: An anemometer directly measures air velocity, which is essential for
determining airflow rates in HVAC duct systems. Hygrometers measure humidity,
manometers measure pressure differences, and infrared cameras detect thermal
patterns, none of which directly measure air velocity.
2.
Which law governs the relationship between voltage, current, and resistance?
A. Newton’s Law
B. Ohm’s Law
,C. Kirchhoff’s Law
D. Boyle’s Law
Answer: B
Rationale: Ohm’s Law defines the relationship V = IR, where voltage equals
current multiplied by resistance. Kirchhoff’s Laws deal with circuit junctions and
loops, while Newton’s and Boyle’s laws apply to mechanics and gases
respectively.
3.
What is the primary purpose of a demand-side management (DSM) program?
A. Increase energy supply
B. Reduce peak energy demand
C. Increase voltage stability
D. Expand transmission lines
Answer: B
Rationale: DSM programs aim to reduce or shift peak electricity demand to
improve grid efficiency and reduce costs. They do not directly increase supply or
expand infrastructure.
4.
Which HVAC system component removes moisture from air?
A. Boiler
B. Chiller
C. Dehumidifier coil
D. Cooling tower
Answer: C
,Rationale: A dehumidifier coil removes moisture by cooling air below its dew
point, causing condensation. Boilers heat water, chillers cool fluids, and cooling
towers reject heat from water loops.
5.
Which metric is MOST useful for comparing building energy performance?
A. BTU
B. EUI
C. kW
D. Voltage
Answer: B
Rationale: Energy Use Intensity (EUI) normalizes energy consumption per square
foot or meter, allowing fair comparison between buildings. BTU, kW, and
voltage do not normalize usage across building size.
6.
What is the function of a variable frequency drive (VFD)?
A. Increase voltage
B. Control motor speed
C. Store energy
D. Measure current
Answer: B
Rationale: VFDs adjust motor speed by varying frequency and voltage,
improving efficiency in pumps and fans. They do not store energy or measure
current directly.
7.
, Which energy source is considered renewable?
A. Coal
B. Natural gas
C. Wind
D. Diesel
Answer: C
Rationale: Wind energy is renewable because it is naturally replenished. Coal,
gas, and diesel are fossil fuels and non-renewable.
8.
What is the primary function of a heat exchanger?
A. Generate electricity
B. Transfer heat between fluids
C. Compress refrigerant
D. Store thermal energy
Answer: B
Rationale: Heat exchangers transfer thermal energy between two fluids without
mixing them, improving HVAC efficiency.
9.
Which unit measures electrical energy consumption?
A. Volt
B. Ampere
C. kWh
D. Ohm
Answer: C
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1.
In a building energy audit, which instrument is MOST appropriate for measuring
air velocity in ductwork?
A. Anemometer
B. Hygrometer
C. Manometer
D. Infrared camera
Answer: A
Rationale: An anemometer directly measures air velocity, which is essential for
determining airflow rates in HVAC duct systems. Hygrometers measure humidity,
manometers measure pressure differences, and infrared cameras detect thermal
patterns, none of which directly measure air velocity.
2.
Which law governs the relationship between voltage, current, and resistance?
A. Newton’s Law
B. Ohm’s Law
,C. Kirchhoff’s Law
D. Boyle’s Law
Answer: B
Rationale: Ohm’s Law defines the relationship V = IR, where voltage equals
current multiplied by resistance. Kirchhoff’s Laws deal with circuit junctions and
loops, while Newton’s and Boyle’s laws apply to mechanics and gases
respectively.
3.
What is the primary purpose of a demand-side management (DSM) program?
A. Increase energy supply
B. Reduce peak energy demand
C. Increase voltage stability
D. Expand transmission lines
Answer: B
Rationale: DSM programs aim to reduce or shift peak electricity demand to
improve grid efficiency and reduce costs. They do not directly increase supply or
expand infrastructure.
4.
Which HVAC system component removes moisture from air?
A. Boiler
B. Chiller
C. Dehumidifier coil
D. Cooling tower
Answer: C
,Rationale: A dehumidifier coil removes moisture by cooling air below its dew
point, causing condensation. Boilers heat water, chillers cool fluids, and cooling
towers reject heat from water loops.
5.
Which metric is MOST useful for comparing building energy performance?
A. BTU
B. EUI
C. kW
D. Voltage
Answer: B
Rationale: Energy Use Intensity (EUI) normalizes energy consumption per square
foot or meter, allowing fair comparison between buildings. BTU, kW, and
voltage do not normalize usage across building size.
6.
What is the function of a variable frequency drive (VFD)?
A. Increase voltage
B. Control motor speed
C. Store energy
D. Measure current
Answer: B
Rationale: VFDs adjust motor speed by varying frequency and voltage,
improving efficiency in pumps and fans. They do not store energy or measure
current directly.
7.
, Which energy source is considered renewable?
A. Coal
B. Natural gas
C. Wind
D. Diesel
Answer: C
Rationale: Wind energy is renewable because it is naturally replenished. Coal,
gas, and diesel are fossil fuels and non-renewable.
8.
What is the primary function of a heat exchanger?
A. Generate electricity
B. Transfer heat between fluids
C. Compress refrigerant
D. Store thermal energy
Answer: B
Rationale: Heat exchangers transfer thermal energy between two fluids without
mixing them, improving HVAC efficiency.
9.
Which unit measures electrical energy consumption?
A. Volt
B. Ampere
C. kWh
D. Ohm
Answer: C
