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AEE Certified Energy Manager (CEM) Sample Questions:

1. Which of the following statements best describe Demand Control Ventilation (DVC) in Building Automation Systems?

A) It's a prescriptive procedure in which outdoor air intake rates are calculated based on the energy cost method that compares a proposed building design to a base annual energy cost design
B) It's a building standard for enclosed spaces in which biological, chemical, and physical contaminants are considered to meet thermal comfort requirements
C) It's an active evaluation of outdoor and indoor space conditions to determine the amount of thermal, mechanical and natural conditioning that is required
D) It satisfies indoor ventilation rates by preconditioning outdoor air with the exhaust air to decrease energy cost during cold, warm, or humid weather

2. Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).

A) 1,845 CDD/yr
B) 1,955 CDD/yr
C) 2,250 CDD/yr
D) 2,555 CDD/yr
E) 2,975 CDD/yr

3. In an ammonia-water absorption chiller, what material is the refrigerant?

A) Water
B) Some form of fluorocarbon
C) Lithium bromide
D) Ammonia

4. In a chilled water thermal energy storage system, chilled water is stored at 4°C and used for supply water.
Chilled water return is 14°C. Calculate the storage capacity required to hold 50 GJ of thermal cooling. (The specific heat of water (C) is 4.2 kJ/kg-°C. Assume no system losses.)

A) 1,356 m³
B) 766 m³
C) 2,618 m³
D) 4,180 m³
E) 1,191 m³

5. According to ISO 50001. when performing internal audits on the energy management system in an organization the internal auditor should do which of the following?
SELECT THE CORRECT ANSWER

A) Review the written procedures related to the area under audit
B) Focus on the areas of significant energy use
C) Assess actual activities as practiced against what the written procedures state
D) Look for opportunities for energy improvement and to minimize bureaucracy inthe energy management system
E) All of the above

Solutions: