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AEE Certified Energy Manager (CEM) Sample Questions:
1. 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) 2,975 CDD/yr
B) 2,250 CDD/yr
C) 1,845 CDD/yr
D) 1,955 CDD/yr
E) 2,555 CDD/yr
2. What is the Energy Use index (EUl) for a 4,000 m2 building that uses the following amountsof energy each year?
A) 3,220,800 kg/m²-yr
B) 625,600 kJ/m²-yr
C) 1,612,000 kJ/m²-yr
D) 855,250 kJ/m²-yr
E) 403,311 kJ/m²-yr
3. In a PID control system, what is the purpose of the Proportional Gain?
A) Control point
B) Reacts to change
C) Reduces/eliminates offset
D) Senses high load rate
4. Electricity costs SO. 10 per kWh. if an electric water heater has an efficiency of 95*6. what is the equivalent price of natural gas per Gigajoule for a natural gas water heater? The natural gas water heater has an efficiency of 95*t based on lower-heating value.
[Natural gas has an energy content of 36.400 K|/m3 (higher-heating value) and 32-760 K/m3 (lower-heating value).] SELECT THE CORRECT ANSWER
A) $21 /GJ
B) $33 /GJ
C) $15/GJ
D) $25 /GJ
5. Exhaust gases from an industrial furnace flow through a heat-recovery steam generator, which generates medium-pressure steam. This steam is used in a steam turbine to generate shaft power driving a fan. Which type of combined heat and power (CHP) cycle does this process describe?
A) Combined cycle
B) Bottoming cycle
C) Topping cycle
D) This cycle is not a combined heat and power system
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: B | Question # 3 Answer: B | Question # 4 Answer: A | Question # 5 Answer: B |
By Clark
