Remediation & Mitigation Strategies Flashcards
7 cards from real EMP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Remediation & Mitigation Strategies flashcards as text
A facility manager wants to reduce demand charges by mitigating peak load. Which strategy uses load shifting rather than load shedding?
Answer: Pre-cooling the building before peak rate periods begin
Pre-cooling shifts the cooling load to off-peak hours using the building's thermal mass, avoiding demand charges without curtailing comfort.
Which remediation action most directly addresses motor system over-sizing, a common source of industrial energy waste?
Answer: Right-sizing motors during scheduled replacement or adding a VFD to reduce effective load
Right-sizing eliminates the efficiency penalty of operating motors at low load, and VFDs allow speed reduction to match actual load requirements.
An energy audit identifies that a facility's steam traps have a 25% failure rate. What is the primary energy impact of failed-open steam traps?
Answer: Live steam blowing directly to the condensate return, wasting latent heat
Failed-open traps pass live steam into the condensate system, wasting the latent heat of vaporization that represents the bulk of steam's energy content.
A grocery store's refrigeration system shows high discharge superheat. Which mitigation measure addresses this root cause?
Answer: Cleaning evaporator coils and checking expansion valve superheat setpoint
Dirty evaporator coils reduce heat transfer and can cause improper expansion valve operation, both of which elevate discharge superheat and reduce system efficiency.
Which mitigation measure best addresses lighting energy waste caused by daylight availability in a perimeter office zone?
Answer: Installing photosensor-based dimming controls linked to luminaires in the daylit zone
Photosensor dimming continuously modulates electric light output in response to available daylight, capturing daylighting savings automatically throughout the day.
A boiler stack analysis shows 15% excess air and 400°F flue gas temperature. Which remediation measure has the highest energy savings potential?
Answer: Installing an economizer to preheat combustion air or feedwater
At 400°F stack temperature, an economizer recovering heat from flue gases provides the greatest absolute energy recovery, though combustion tuning should accompany it.
Which approach is the correct sequence for applying the energy efficiency hierarchy when remediating a facility?
Answer: Eliminate waste first, then optimize operations, then upgrade equipment
The efficiency hierarchy prioritizes eliminating waste (behavior/scheduling), then operational optimization, then capital upgrades to avoid over-sizing efficient equipment for wasteful loads.