Energy Management & Utilities Flashcards
7 cards from real CPM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Energy Management & Utilities flashcards as text
What is the primary purpose of implementing ISO 50001 in a manufacturing facility?
Answer: Establish a systematic framework for improving energy performance
ISO 50001 provides a systematic framework for organizations to establish energy policies, set targets, and continually improve energy performance.
Which metric is most commonly used to measure energy efficiency in a manufacturing plant?
Answer: Energy intensity (energy consumed per unit of output)
Energy intensity normalizes energy consumption against production output, making it a meaningful efficiency metric across varying production volumes.
What is the primary purpose of power factor correction in industrial facilities?
Answer: Reduce reactive power and lower utility demand charges
Power factor correction reduces reactive power (kVAR), which lowers apparent power demand and associated utility charges while improving system efficiency.
Variable frequency drives (VFDs) deliver the greatest energy savings in which type of application?
Answer: Centrifugal pumps and fans operating at partial load
Centrifugal pumps and fans follow the affinity laws where power consumption drops with the cube of speed reduction, making VFDs extremely effective at partial loads.
In electrical utility billing, a 'demand charge' is based on:
Answer: The highest 15- or 30-minute average power draw recorded in the period
Demand charges are based on peak power demand (highest average over a 15- or 30-minute interval), reflecting the utility's cost to maintain capacity for peak usage.
Which level of ASHRAE energy audit provides detailed equipment-level measurements and ROI calculations for capital-intensive modifications?
Answer: Level 3 – Detailed Analysis of Capital Intensive Modifications
A Level 3 audit provides detailed engineering analysis including equipment measurements, energy models, and financial analysis required to justify major capital investments.
Failed-open steam traps in industrial facilities most commonly result in:
Answer: Energy waste through direct steam leakage to condensate return
Failed-open steam traps allow live steam to pass into the condensate return line, wasting significant energy that should have been used for process heating.