AEE Certified Energy Manager (CEM) 認定 CEM 試験問題:

1. Which of the following instruments is most useful for tracking long-term boiler performance?

A) The feedwater temperature sensor
B) The exhaust stack temperature sensor
C) The drum water level gauge
D) The pressure gauge
E) The boiler room ambient temperature sensor

2. How much energy (kJ) is required to heat 2 kg of water from 25°C to 2 kg of water at 100°C? (The specific heat of water (C) is 4.2 kJ/kg-°C. Assume no system losses.)

A) 420 kJ
B) 840 kJ
C) 510 kJ
D) 630 kJ

3. What is the main cause of low power factor?

A) Harmonics
B) Computers and electronic equipment
C) Low-load induction motors
D) Fluorescent lighting
E) Solar flares

4. A desk lamp is located inside a windowless office. The office is heated during the winter and cooled during the summer. When the lamp is switched on, how much of the energy consumed by the lamp becomes heat in the office space?

A) 25%
B) 120%
C) 80%
D) 100%

5. An outdoor parking area has 25 light poles. Each pole has a 420 Watt (ballast included) high-pressure sodium (HPS) luminaire. The parking area lights are illuminated 4,500 hours per year and the electricity cost is $0.08
/kWh. What is the annual energy cost reduction if each luminaire is replaced with a 220-Watt (driver included) LED luminaire?

A) $1,800/yr
B) $2,200/yr
C) $2,600/yr
D) $1,500/yr
E) $1,200/yr

質問と回答：