Free AEE CEM Exam Dumps Questions & Answers

A 25-kW motor, at full load, drives a centrifugal fan that produces 160,000 liters per second (l/s) of ventilation air. If the fan speed is reduced to a flow rate of 150,000 l/s, what is the new load on the motor?

• A.  15.2 kW
• B.  24.2 kW
• C.  30.3 kW
• D.  25.0 kW
• E.  20.6 kW

A new energy-efficient boiler costs $60,890 to buy and install. The new energy-efficient boiler will save
$15,400 per year and last for 20 years. What is the internal rate of return (IRR) of the project?

• A.  20%
• B.  25%
• C.  15%
• D.  30%
• E.  10%

Using the lumen method, calculate the number of luminaires (fixtures) required to light a room to 200 lux.
Each luminaire has 2 fluorescent lamps, 3,000 lumens per lamp. The room is 20 meters by 30 meters. The total light loss factor (LLF) is 0.70 and the luminaire coefficient of utilization (CU) is 0.80.

• A.  48 luminaires
• B.  36 luminaires
• C.  60 luminaires
• D.  24 luminaires
• E.  12 luminaires

Which motor parameter is the most difficult to measure with precision?

• A.  Operating (rotating) speed
• B.  Input power
• C.  Alternating current (AC) frequency
• D.  Output power capacity
• E.  Operating load factor

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

• A.  Back-pressure turbine
• B.  Condensing turbine
• C.  Extraction turbine
• D.  Answers A and B