CMM Energy Management & Sustainability 3

Question 1

Under ASHRAE Standard 90.1, what does the standard primarily govern?

Accepted Answer

Energy efficiency requirements for commercial buildings

Answer

Indoor air quality thresholds for occupied spaces

Answer

Refrigerant management and phase-out schedules

Answer

Water efficiency standards for plumbing fixtures

Question 2

What is 'submetering' in a multi-tenant building context?

Accepted Answer

Installing individual utility meters for each tenant to track their specific energy or water consumption

Answer

Measuring energy at sub-panel breakers to detect electrical faults

Answer

Using smart meters to bill tenants below the standard utility rate

Answer

Monitoring energy use in subbasements and mechanical rooms only

Question 3

Which building envelope component has the greatest impact on reducing heating and cooling loads in most U.S. climates?

Accepted Answer

Roof and ceiling insulation

Answer

Interior partition walls

Answer

Raised access flooring

Answer

Decorative exterior cladding

Question 4

A carbon footprint assessment for a building typically measures emissions in units of:

Accepted Answer

Metric tons of CO2 equivalent (MT CO2e)

Answer

Kilowatt-hours of energy consumed

Answer

British Thermal Units per square foot

Answer

Parts per million of greenhouse gases

Question 5

What is the primary function of an economizer cycle in an HVAC system?

Accepted Answer

To use outside air for free cooling when outdoor conditions are favorable, reducing mechanical cooling energy

Answer

To recover heat from exhaust air and transfer it to incoming supply air

Answer

To modulate compressor speed based on cooling demand

Answer

To reduce refrigerant charge by pre-cooling return air with outdoor air

Question 6

Which water conservation strategy involves capturing and treating rainwater from rooftops for non-potable uses such as toilet flushing or irrigation?

Accepted Answer

Rainwater harvesting

Answer

Greywater recycling

Answer

Blackwater treatment

Answer

Condensate recovery

Question 7

When evaluating energy efficiency projects, the 'simple payback period' is calculated as:

Accepted Answer

Initial cost divided by annual energy cost savings

Answer

Annual energy cost savings divided by initial cost

Answer

Net present value divided by annual savings

Answer

Total lifecycle cost minus salvage value