Free AEE CEM Practice Exam with Questions & Answers

A three phase, 380-volt system, has the following voltage measurements:

Va = 375 volts

Vb = 380 volts

Vc = 391 volts

Calculate the percent voltage imbalance.

If installed without ancillary equipment, photovoltaic power cells generate what type of power?

Insulation has a thermal conductivity of 0.04 Watt/(m-°C). What is the R-value for this insulation when it is 5-cm thick?

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.

Which of the following controls can optimize the operation of lighting systems?

The International Performance Measurement and Verification Protocol (IPMVP) has how many categories (method options) to determine the performance of an energy- or water-consuming system?

What type of passive heat exchanger can wrap around an evaporator coil to precool entering air and reheat the air after the cooling coil without adding more moisture to the supply air stream?

A building is conditioned by an air-conditioning and heating system. What technology can directly prevent simultaneous heating and cooling of the space?

A steam trap with a 6-mm orifice in an 0.8-MPa steam system has failed open. The steam system is pressurized8.760 hours/yr. The steam cost is $15.00 /GJ. Using thetable below, what is the annualcost of the vented steam through the failed steam trap? ignore any condensate return issues.

[The question from the previous image, which was about calculating the annual cost of heat loss through a wall, but had a discrepancy between the calculated cost and the provided answer choices]

Which of the following is NOT a typical benefit of performance contracting from the building owner's perspective?