CPE Energy Management & Efficiency Flashcards
6 cards from real CPE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPE Energy Management & Efficiency flashcards as text
Which metric is used to measure the efficiency of a boiler system?
Answer: Combustion efficiency
Combustion efficiency measures how effectively a boiler converts fuel energy into heat by analyzing flue gas composition.
What is the primary purpose of a variable frequency drive (VFD) in an HVAC system?
Answer: Reduce motor speed to match load demand and save energy
VFDs reduce motor speed proportionally to load demand, cutting energy consumption significantly since power varies with the cube of speed.
An ISO 50001 energy management system certification is best described as:
Answer: A framework for continually improving energy performance and reducing consumption
ISO 50001 provides organizations with a systematic framework for managing energy use and continuously improving energy performance.
What does the term 'demand charge' refer to on a commercial electricity bill?
Answer: A fee based on the peak power draw during a billing period
Demand charges are fees based on the highest power demand (kW) recorded during any interval in the billing period, incentivizing load leveling.
Which type of lighting upgrade typically provides the greatest energy savings in an industrial facility?
Answer: Replacing HID fixtures with LED fixtures
Replacing high-intensity discharge (HID) lamps with LEDs can reduce lighting energy consumption by 40–70% while improving light quality.
In steam system energy management, what is 'flash steam'?
Answer: Low-pressure steam generated when high-pressure condensate is released to a lower pressure
Flash steam forms when high-temperature condensate at high pressure is discharged to a lower pressure, with a portion of the liquid instantly vaporizing.