AFE Energy Management & Sustainability 3

Question 1

Under ASHRAE 90.1, which building system is addressed by the lighting power density (LPD) requirements?

Accepted Answer

Interior and exterior electrical lighting

Answer

ASHRAE 90.1 sets maximum lighting power density limits (W/sq ft) for interior and exterior lighting to ensure energy-efficient lighting design.

Question 2

What does a Power Purchase Agreement (PPA) allow a facility to do?

Accepted Answer

Buy electricity generated by a third-party renewable system at a fixed rate without owning the equipment

Answer

A PPA allows a facility to purchase renewable electricity from a third-party owner/developer at a predetermined rate, avoiding upfront capital costs for generation equipment.

Question 3

In the context of sustainable facilities management, what does 'embodied carbon' refer to?

Accepted Answer

Greenhouse gas emissions associated with material extraction, manufacturing, and construction

Answer

Embodied carbon encompasses all GHG emissions from the entire material lifecycle—extraction, processing, manufacturing, transport, and construction—before a building is occupied.

Question 4

A building's chiller plant has a measured COP of 4.5. What does this value indicate?

Accepted Answer

The chiller produces 4.5 kW of cooling for every 1 kW of electrical input

Answer

COP (Coefficient of Performance) is the ratio of useful cooling output to energy input; a COP of 4.5 means 4.5 units of cooling are delivered per unit of electricity consumed.

Question 5

Which strategy is most effective for reducing a facility's peak electrical demand during summer afternoons?

Accepted Answer

Pre-cooling the building during morning off-peak hours (thermal mass shifting)

Answer

Pre-cooling exploits lower overnight or morning electricity rates and shifts cooling load away from peak demand periods by storing 'coolth' in the building's thermal mass.

(AFE) Association for Facilities Engineering Certification Practice Test

(AFE) Association for Facilities Engineering Certification Practice Test

AFE Energy Management & Sustainability 3