Certified Energy Manager Audit & Billing 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 Certified Energy Manager Audit & Billing flashcards as text
During a walk-through audit, an auditor observes that lighting in a warehouse remains on 24/7 despite occupancy only during two 8-hour shifts. The FIRST recommendation should be:
Answer: Install occupancy sensors or timers to match operating hours
Occupancy sensors or timers are typically low-cost operational measures that immediately eliminate lighting waste during unoccupied periods.
Which instrument is MOST appropriate for measuring true power (kW) and power factor simultaneously in a facility audit?
Answer: Power quality analyzer
A power quality analyzer measures voltage, current, true power (kW), apparent power (kVA), and power factor simultaneously.
A simple payback period (SPP) is calculated as:
Answer: Installed cost divided by annual energy cost savings
Simple payback period equals the total installed cost divided by the annual energy cost savings, giving years to recover the investment.
What does the term 'demand ratchet' most directly affect on a commercial electricity bill?
Answer: The minimum billable demand for future months
A demand ratchet sets a minimum billable demand (e.g., 75% of peak) for subsequent months, even if actual demand is lower.
An M&V plan following IPMVP Option B (Retrofit Isolation with Short-Term Measurement) requires:
Answer: Metering only the retrofitted system using short-term post-retrofit measurements
IPMVP Option B isolates and meters only the retrofitted equipment, using short-term post-installation measurements to verify savings.
In an energy audit report, which financial metric accounts for the time value of money?
Answer: Net Present Value (NPV)
NPV discounts future cash flows to present value, properly accounting for the time value of money unlike simple payback.
A CEM finds that a facility's monthly bills include a 'customer charge' that remains constant regardless of consumption. This charge primarily covers:
Answer: Fixed utility infrastructure and administrative costs
The customer charge is a fixed monthly fee covering the utility's cost of metering, billing, and maintaining the service connection.