問題1
A 100-kW packaged engine-generator combined heat and power (CHP) system has the specifications listed below. What is the annual purchased fuel cost for the CHP system, assuming that the CHP is electrical output limited and operates at full electrical load all year?
SELECT THE CORRECT ANSWER
A 100-kW packaged engine-generator combined heat and power (CHP) system has the specifications listed below. What is the annual purchased fuel cost for the CHP system, assuming that the CHP is electrical output limited and operates at full electrical load all year?
SELECT THE CORRECT ANSWER
正確答案: E
問題2
The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient (outside) air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that the cooler outside air is fed directly to the air compressor's intake, the compressor's energy requirement will now be expected to:
SELECT THE CORRECT ANSWER
The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient (outside) air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that the cooler outside air is fed directly to the air compressor's intake, the compressor's energy requirement will now be expected to:
SELECT THE CORRECT ANSWER
正確答案: B
問題3
How does an enthalpy-based economizer control operate?
How does an enthalpy-based economizer control operate?
正確答案: D
問題4
How can you tell if steam traps in a steam distribution system may NOT be working correctly?
How can you tell if steam traps in a steam distribution system may NOT be working correctly?
正確答案: C
問題5
A 75-kW induction motor operates at 80% partial load and 88% efficiency. A new high-efficiency 75-kW motor can be installed that will operate at 95% efficiency (also at 80% partial load). What is the reduction in electric power demand?
A 75-kW induction motor operates at 80% partial load and 88% efficiency. A new high-efficiency 75-kW motor can be installed that will operate at 95% efficiency (also at 80% partial load). What is the reduction in electric power demand?
正確答案: C
問題6
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?
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?
正確答案: D
問題7
If the initial design process includes group relamping, how can this reduce the number of lamps required to illuminate a space?
If the initial design process includes group relamping, how can this reduce the number of lamps required to illuminate a space?
正確答案: D