EMP Remediation & Mitigation Strategies 3

Question 1

A facility manager wants to reduce demand charges by mitigating peak load. Which strategy uses load shifting rather than load shedding?

Accepted Answer

Pre-cooling the building before peak rate periods begin

Answer

Pre-cooling shifts the cooling load to off-peak hours using the building's thermal mass, avoiding demand charges without curtailing comfort.

Question 2

Which remediation action most directly addresses motor system over-sizing, a common source of industrial energy waste?

Accepted Answer

Right-sizing motors during scheduled replacement or adding a VFD to reduce effective load

Answer

Right-sizing eliminates the efficiency penalty of operating motors at low load, and VFDs allow speed reduction to match actual load requirements.

Question 3

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?

Accepted Answer

Live steam blowing directly to the condensate return, wasting latent heat

Answer

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.

Question 4

A grocery store's refrigeration system shows high discharge superheat. Which mitigation measure addresses this root cause?

Accepted Answer

Cleaning evaporator coils and checking expansion valve superheat setpoint

Answer

Dirty evaporator coils reduce heat transfer and can cause improper expansion valve operation, both of which elevate discharge superheat and reduce system efficiency.

Question 5

Which mitigation measure best addresses lighting energy waste caused by daylight availability in a perimeter office zone?

Accepted Answer

Installing photosensor-based dimming controls linked to luminaires in the daylit zone

Answer

Photosensor dimming continuously modulates electric light output in response to available daylight, capturing daylighting savings automatically throughout the day.

(EMP) Energy Management Professional Practice Test

(EMP) Energy Management Professional Practice Test

EMP Remediation & Mitigation Strategies 3