Free CEM Questions for AEE Certified Energy Manager (CEM) CEM Exam as PDF & Practice Test Engine
Which heat recovery device listed below can be used to preheat boiler make-up water using the heat energy from skimming blowdown?
Correct Answer: C
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A 50-kW induction motor (1,500 rpm synchronous speed) has a nameplate full-load rotational speed of 1,455 rpm. Field measurements show the actual rotational speed is 1,475 rpm. Using the slip method, calculate the partial load factor of the motor.
Correct Answer: C
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If the initial design process includes group relamping, how can this reduce the number of lamps required to illuminate a space?
Correct Answer: E
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A controlled valve is full closed when it gets a signal of 4 mA. The valve is full open when it gets a signal of
20 mA. With a control signal of 8 mA, what is the valve position?
20 mA. With a control signal of 8 mA, what is the valve position?
Correct Answer: C
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How can commissioning reduce the life-cycle cost to owners and operators?
Correct Answer: E
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An energy project implemented today saves $10,000 per year for the next 20 years. Using the 5% interest table, determine the total value of savings at the end of the 20th year?
Correct Answer: E
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What type of heat exchanger is commonly built into AHU's or large RTU's, can be used to recover heat from exhaust air, and may cause cross-contamination between heat exchange fluids?
Select the Correct Answer
Select the Correct Answer
Correct Answer: E
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An office building is illuminated with T8 fluorescent lamps. Which of the following is the best schedule for group relamping (total replacement of all the T8 fluorescent lamps in the building)?
Correct Answer: D
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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?
Correct Answer: C
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Natural gas costs $4.80/GJ. How much does it cost to heat 500 liters of water from 18°C to 50°C using a natural gas water heater with an efficiency of 85%? [The efficiency and fuel price are both based on HHV.
The specific heat of water (C) is 4.2 kJ/kg-°C.]
The specific heat of water (C) is 4.2 kJ/kg-°C.]
Correct Answer: C
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