Practice Test Geeks(EMP) Energy Management Professional Practice Test
← All EMP Flashcard Decks

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. A facility manager installs occupancy sensors in conference rooms that were previously lit 24/7. The rooms are occupied only 30% of the time. What is the approximate energy savings percentage for lighting in those rooms?

    Answer: 70%

    Sensors eliminate lighting during the 70% of time rooms are unoccupied, saving approximately 70% of lighting energy.

  2. Which metric is used to measure the energy efficiency of a chiller system?

    Answer: Coefficient of Performance (COP)

    COP measures the ratio of cooling output to electrical energy input for chiller systems.

  3. An energy manager wants to reduce peak demand charges. Which strategy is MOST effective for demand-side management?

    Answer: Load shifting using thermal energy storage

    Thermal energy storage shifts cooling loads to off-peak hours, directly reducing peak demand charges.

  4. What is the purpose of a Variable Frequency Drive (VFD) installed on a pump motor?

    Answer: To match motor speed to actual load requirements, reducing energy waste

    VFDs adjust motor speed to match actual demand, reducing energy consumption significantly at partial loads.

  5. A building's air handling unit operates at constant volume. Converting it to variable air volume (VAV) typically reduces fan energy by what percentage range?

    Answer: 30–60%

    VAV systems reduce fan energy by 30–60% because fan power varies with the cube of airflow volume.

  6. Which type of lighting control strategy is BEST suited for perimeter office spaces with significant daylight availability?

    Answer: Daylight harvesting with dimming controls

    Daylight harvesting dims electric lights in proportion to available natural light, maximizing savings in daylit zones.

  7. An energy manager reviews a compressed air system audit and finds the system leaks at a rate equivalent to 25% of total compressed air production. What is the recommended first action?

    Answer: Implement a leak detection and repair (LDAR) program

    A leak detection and repair program targets the source of waste, which is the most cost-effective compressed air conservation measure.