2026 Provide Updated AEE CEM Dumps as Practice Test and PDF [Q15-Q32]

QUESTION 15
What is a common cause of poor power quality?

QUESTION 16
Which of the following best describes a thermally-light building?

QUESTION 17
Some international electric utilities use ‘net metering” for customers with renewable energy equipment, such as photovoltaic power panels. Which of the following best describes net metering with regard to excess power generation and utility billing practices?
SELECT THE CORRECT ANSWER

问题 18
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?

问题 19
Calculate the monthly electric bill for a customer that used 400 kW and 75,000 kwh during one month. Use the following declining block structure for a monthly bill:

SELECT THE CORRECT ANSWER

问题 20
Which of the following steam turbines will likely not provide steam output at a useable temperature for industrial processes?

问题 21
What is a common method to reduce the impact of voltage imbalance?

问题 22
A 75-kW induction motor operates at 80% partial load and 88% efficiency. A new high-efficiency 75-kW motor can be installed that will operate at 95% efficiency (also at 80% partial load). What is the reduction in electric power demand?

问题 23
A hot-water boiler has a cut-in set point of 65°C on the hot water supply temperature and a differential set point of 10°C. What is the hot-water supply temperature that causes the boiler to turn off?

问题 24
How can commissioning reduce the life-cycle cost to owners and operators?

问题 25
A 3 MW rated wind-powered turbine has a rotor diameter of 113 meters. What is the efficiency of the wind turbine at rated power if it is operating in wind power calculated at 8.6 MW? Assume an air density of 1.225 kg/m³.

问题 26
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

问题 27
You can buy air compressor A for $15,000 or air compressor B for $6,000. Compressor A will cost $10,000 per year to operate. Compressor B will cost $11,500 per year to operate. If both air compressors have a 10- year life and your required return on investment is 12%, which air compressor has the lowest total life-cycle cost?

问题 28
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

问题 29
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.]

问题 30
A cooling tower is delivering water to a chilled-water plant. The cooling tower outlet temperature has a 6°C approach temperature to the ambient air, wet-bulb temperature. The outside air conditions are 20°C dry bulb,
60% relative humidity. Using the psychrometric chart, at what temperature can the cooling tower deliver water to the chilled-water plant?

问题 31
A building has a 100 m² wall with an R-value of 14.4 (m²-C/W) in a climate with 3,500 heating degree days (HDD). The building heater is 85% efficient [based on the fuel’s higher-heating value (HHV)]. The fuel cost is $5.00/GJ [based on the fuel’s higher-heating value (HHV)]. What is the annual cost of the heat loss through the wall?

问题 32
A motor operates with a normal and constant load. The electric current is measured to be 25% of the motor’s nameplate rating. What does this mean?