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
When auditing a steam system, a CEM uses an ultrasonic leak detector and identifies multiple steam trap failures. Failed-open traps primarily cause:
Answer: Continuous steam blowthrough and wasted fuel
A steam trap that fails open allows live steam to pass continuously into the condensate return system, directly wasting fuel.
Which energy audit deliverable documents the scope of work, audit boundaries, and data collection methodology agreed upon before fieldwork begins?
Answer: Audit work plan or scope of work document
The audit work plan or scope of work document defines boundaries, objectives, and methods before the auditor begins data collection.
A CEM is reviewing a compressed air system and finds the system operates at 120 psi but end-use equipment only requires 90 psi. Reducing system pressure to 95 psi would primarily:
Answer: Reduce compressor energy consumption and leakage losses
Reducing compressed air system pressure lowers compressor power consumption and reduces air leakage rates, which are pressure-dependent.
On a utility bill, the 'fuel adjustment clause' or 'fuel cost adjustment' represents:
Answer: A variable charge that passes fuel cost fluctuations to customers
Fuel adjustment clauses allow utilities to pass variable fuel procurement costs directly to customers, adjusting monthly as fuel prices change.
During an ASHRAE Level II audit, which of the following is typically NOT included?
Answer: Detailed engineering calculations for each ECM
Detailed engineering calculations for each ECM are characteristic of a Level III audit, not Level II, which uses estimates rather than rigorous engineering analysis.
A CEM calculates an Internal Rate of Return (IRR) of 22% for an energy project. This means:
Answer: The project's discount rate at which NPV equals zero is 22%
IRR is the discount rate that makes the net present value of all cash flows equal to zero; a 22% IRR is typically considered attractive for energy projects.
When evaluating electricity bills for demand charge reduction opportunities, which interval data granularity provides the MOST actionable insight?
Answer: 15-minute interval demand data
15-minute interval data reveals the exact timing and duration of demand spikes, enabling targeted load control strategies.