Practice Test Geeks(EMP) Energy Management Professional Practice Test
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Energy Efficiency & Conservation Techniques Flashcards

7 cards from real EMP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Energy Efficiency & Conservation Techniques flashcards as text

  1. Which building envelope measure provides the greatest energy benefit in a climate with both hot summers and cold winters?

    Answer: Installing low-emissivity (low-e) window glazing

    Low-e coatings reduce both solar heat gain in summer and radiant heat loss in winter, benefiting mixed climates year-round.

  2. A process heating system uses natural gas. The energy manager proposes heat recovery from exhaust gases. What device is typically installed for this purpose?

    Answer: Recuperator or regenerator heat exchanger

    Recuperators and regenerators transfer heat from hot exhaust gases to incoming combustion air, improving furnace efficiency.

  3. According to DOE guidelines, what is the recommended setpoint range for server room cooling to maximize energy efficiency without risking equipment damage?

    Answer: 80–95°F (27–35°C)

    ASHRAE A1 class equipment allows inlet temperatures up to 80.6°F (27°C), and raising setpoints toward this range cuts cooling energy significantly.

  4. What is the primary advantage of a ground-source heat pump (GSHP) over an air-source heat pump in cold climates?

    Answer: Access to a more stable heat source that remains above freezing

    Ground temperatures remain relatively constant year-round, allowing GSHPs to maintain high efficiency even when outdoor air temperatures are very low.

  5. An energy manager calculates the 'simple payback period' for an efficiency upgrade. Which formula is correct?

    Answer: Project Cost ÷ Annual Energy Cost Savings

    Simple payback period equals the initial investment divided by the annual cost savings, expressed in years.

  6. A facility switches from T12 fluorescent lamps to T8 LED tubes. Besides energy savings, what operational benefit is gained?

    Answer: Longer lamp life reducing maintenance and replacement costs

    LED lamps typically last 50,000+ hours compared to 20,000 hours for T8 fluorescents, significantly reducing maintenance labor and lamp costs.

  7. What does 'retro-commissioning' (RCx) mean in the context of building energy efficiency?

    Answer: Systematically investigating and optimizing existing building systems to restore or improve performance

    Retro-commissioning optimizes existing building systems that were never commissioned or have drifted from optimal performance over time.