Methods and Strategies Flashcards
7 cards from real CEM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Methods and Strategies flashcards as text
A CEM is tasked with reducing plug load energy consumption in an office building. Which strategy is MOST effective?
Answer: Deploying smart power strips and enforcing plug load management policies
Smart power strips eliminate phantom loads from peripherals, and a formal plug load policy addresses the behavioral and procurement aspects that hardware alone cannot solve.
Which strategy BEST supports continuous energy improvement under ISO 50001?
Answer: Establishing energy performance indicators (EnPIs) and monitoring them regularly
ISO 50001 requires ongoing tracking of EnPIs to demonstrate continual improvement and catch performance degradation before it becomes costly.
When evaluating lighting upgrade strategies, what is the advantage of using a lighting control system in addition to LED fixtures?
Answer: It captures additional savings through dimming, occupancy, and daylight harvesting controls
Controls layer additional savings on top of lamp efficiency by ensuring lights operate only when and at the level needed, often doubling the savings from lamp replacement alone.
A CEM discovers that a large fan system is operating at full speed continuously despite variable airflow needs. What is the BEST corrective strategy?
Answer: Install a variable frequency drive (VFD) on the fan motor
A VFD reduces fan speed to match actual demand; because fan power varies with the cube of speed, small speed reductions yield dramatic energy savings.
What is 'energy procurement strategy' and why is it important for large energy users?
Answer: Actively managing when, how, and from whom energy is purchased to minimize cost and risk
Large users can negotiate rates, choose contract structures, hedge against price volatility, and access green tariffs — all of which significantly impact energy costs beyond efficiency measures alone.
A CEM is evaluating a building envelope improvement project. Which metric BEST quantifies the energy benefit of adding roof insulation?
Answer: U-value reduction and resultant heating/cooling load reduction
U-value (thermal transmittance) directly measures heat flow through the assembly; reducing U-value lowers the heating and cooling energy required to maintain comfort.
Which approach BEST describes an 'energy treasure hunt' as used in industrial energy management?
Answer: A structured team walkthrough to identify operational waste and no-cost improvement opportunities
An energy treasure hunt is a focused, team-based event — popularized by Toyota and the DOE — where cross-functional staff walk the facility to spot waste, leaks, and behavioral fixes in real time.