A new lighting system costs $60,000. The new lighting system has a 15-year life and the minimum required rate of return (MARR) is 15%. How much must the new lighting system save to be life-cycle cost effective?

In an ammonia-water absorption chiller, what material is the refrigerant?

A facility owner is considering installing a new chiller. The installed project cost will be $300,000. The annual savings from the energy-saving project will be $45,000 for the 20-year life of the chiller. If an energy-service company requires a minimum 20% return on investment (pre-tax), will the energy-service company agree to finance this project?

A compressed air system has a total volume of 247,500 liters. During a 30-minute break in production (air compressor system turned off and no production demand for compressed air), the system pressure drops from 7 bar, gauge (700 kPa, gauge) to 5 bar, gauge (500 kPa, gauge). Calculate the leakage rate in the compressed air system.

Which of the following color temperatures looks more like daylight?

Which motor parameter is the most difficult to determine accurately?

SELECT THE CORRECT ANSWER

If the initial design process includes group relamping, how can this reduce the number of lamps required to illuminate a space?

A cooling tower delivers water to a chilled-water plant at 21°C. The outside ambient air conditions are 19°C dry bulb, 50% relative humidity. Using the psychrometric chart, what is the approach temperature of the cooling tower outlet water temperature to the ambient air wet-bulb temperature?

SELECT THE CORRECT ANSWER

Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).

Which of the following is NOT a typical benefit of performance contracting from the building owner ' s perspective?