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AEE Certified Energy Manager (CEM) Sample Questions:

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

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

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

3. What is the main reason for using instrumentation in energy audits?

A) Validate utility energy bills
B) Save energy
C) Support the local economy
D) Determine energy flows

4. The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that ambient air is fed directly to the air compressor's intake, what impact can be expected on the air compressor's energy requirement?

A) Increase energy use by 3.8%
B) Decrease energy use by 3.8%
C) Increase energy use by 7.6%
D) Decrease energy use by 7.6%
E) No measureable change in energy use

5. Which of the advantages listed below, makes an ice TES system more preferred over a water TES system, when a load shifting strategy is considered?

A) Ice-storage systems require lower maintenance due to lower pumping volume
B) Ice-storage systems operate with a higher coefficient of performance (COP)
C) Ice-storage systems require smaller storage tanks since ice has a higher energy storage density
D) Water-storage systems require smaller storage tanks since water has a higher density than ice

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