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AEE Certified Energy Manager (CEM) Sample Questions:

1. In a PID control system, what is the purpose of the Proportional Gain?

A) Reduces/eliminates offset
B) Reacts to change
C) Control point
D) Senses high load rate

2. Which of the following International Performance Measurement and Verification Protocol (IPMVP) options would you use to verify annual energy savings in a project that upgraded lighting in a large manufacturing plant?

A) Option D - Calibrated simulation
B) Option B - Retrofit isolation: all parameter measurement
C) Option A - Retrofit isolation: key parameter measurement
D) Option E - Stipulated savings
E) Option C - Whole facility measurement

3. Using the lumen method, calculate the number of luminaires (fixtures) required to light a room to 200 lux.
Each luminaire has 2 fluorescent lamps, 3,000 lumens per lamp. The room is 20 meters by 30 meters. The total light loss factor (LLF) is 0.70 and the luminaire coefficient of utilization (CU) is 0.80.

A) 36 luminaires
B) 12 luminaires
C) 48 luminaires
D) 24 luminaires
E) 60 luminaires

4. Which pump system listed below is most likely the best application for converting to variable-speed drive?

A) Pump system with on-off control transferring liquid vertically from a low tank to a higher tank
B) Pump system with parallel rotary lobe pumps in a rebar quenching application with a static head of 80m
C) Pump system with bypass control transferring liquid from an intake dam to a process in production
D) Pump system with throttle fully open circulating liquid in a closed loop cooling system

5. Which motor parameter is the most difficult to measure with precision?

A) Operating load factor
B) Alternating current (AC) frequency
C) Output power capacity
D) Input power
E) Operating (rotating) speed

Solutions: